Upload Kmake

test/common/arraystream.js

@@ -0,0 +1,23 @@
+'use strict';
+
+const { Stream } = require('stream');
+function noop() {}
+
+// A stream to push an array into a REPL
+function ArrayStream() {
+  this.run = function(data) {
+    data.forEach((line) => {
+      this.emit('data', `${line}\n`);
+    });
+  };
+}
+
+Object.setPrototypeOf(ArrayStream.prototype, Stream.prototype);
+Object.setPrototypeOf(ArrayStream, Stream);
+ArrayStream.prototype.readable = true;
+ArrayStream.prototype.writable = true;
+ArrayStream.prototype.pause = noop;
+ArrayStream.prototype.resume = noop;
+ArrayStream.prototype.write = noop;
+
+module.exports = ArrayStream;

test/common/assertSnapshot.js

@@ -0,0 +1,112 @@
+'use strict';
+const common = require('.');
+const path = require('node:path');
+const test = require('node:test');
+const fs = require('node:fs/promises');
+const assert = require('node:assert/strict');
+
+const stackFramesRegexp = /(?<=\n)(\s+)((.+?)\s+\()?(?:\(?(.+?):(\d+)(?::(\d+))?)\)?(\s+\{)?(\[\d+m)?(\n|$)/g;
+const windowNewlineRegexp = /\r/g;
+
+function replaceNodeVersion(str) {
+  return str.replaceAll(process.version, '*');
+}
+
+function replaceStackTrace(str, replacement = '$1*$7$8\n') {
+  return str.replace(stackFramesRegexp, replacement);
+}
+
+function replaceInternalStackTrace(str) {
+  return str.replaceAll(/(\W+).*node:internal.*/g, '$1*');
+}
+
+function replaceWindowsLineEndings(str) {
+  return str.replace(windowNewlineRegexp, '');
+}
+
+function replaceWindowsPaths(str) {
+  return common.isWindows ? str.replaceAll(path.win32.sep, path.posix.sep) : str;
+}
+
+function transformProjectRoot(replacement = '') {
+  const projectRoot = path.resolve(__dirname, '../..');
+  return (str) => {
+    return str.replaceAll('\\\'', "'").replaceAll(projectRoot, replacement);
+  };
+}
+
+function transform(...args) {
+  return (str) => args.reduce((acc, fn) => fn(acc), str);
+}
+
+function getSnapshotPath(filename) {
+  const { name, dir } = path.parse(filename);
+  return path.resolve(dir, `${name}.snapshot`);
+}
+
+async function assertSnapshot(actual, filename = process.argv[1]) {
+  const snapshot = getSnapshotPath(filename);
+  if (process.env.NODE_REGENERATE_SNAPSHOTS) {
+    await fs.writeFile(snapshot, actual);
+  } else {
+    let expected;
+    try {
+      expected = await fs.readFile(snapshot, 'utf8');
+    } catch (e) {
+      if (e.code === 'ENOENT') {
+        console.log(
+          'Snapshot file does not exist. You can create a new one by running the test with NODE_REGENERATE_SNAPSHOTS=1',
+        );
+      }
+      throw e;
+    }
+    assert.strictEqual(actual, replaceWindowsLineEndings(expected));
+  }
+}
+
+/**
+ * Spawn a process and assert its output against a snapshot.
+ * if you want to automatically update the snapshot, run tests with NODE_REGENERATE_SNAPSHOTS=1
+ * transform is a function that takes the output and returns a string that will be compared against the snapshot
+ * this is useful for normalizing output such as stack traces
+ * there are some predefined transforms in this file such as replaceStackTrace and replaceWindowsLineEndings
+ * both of which can be used as an example for writing your own
+ * compose multiple transforms by passing them as arguments to the transform function:
+ * assertSnapshot.transform(assertSnapshot.replaceStackTrace, assertSnapshot.replaceWindowsLineEndings)
+ * @param {string} filename
+ * @param {function(string): string} [transform]
+ * @param {object} [options] - control how the child process is spawned
+ * @param {boolean} [options.tty] - whether to spawn the process in a pseudo-tty
+ * @returns {Promise<void>}
+ */
+async function spawnAndAssert(filename, transform = (x) => x, { tty = false, ...options } = {}) {
+  if (tty && common.isWindows) {
+    test({ skip: 'Skipping pseudo-tty tests, as pseudo terminals are not available on Windows.' });
+    return;
+  }
+  let flags = common.parseTestFlags(filename);
+  if (options.flags) {
+    flags = [...options.flags, ...flags];
+  }
+
+  const executable = tty ? (process.env.PYTHON || 'python3') : process.execPath;
+  const args =
+    tty ?
+      [path.join(__dirname, '../..', 'tools/pseudo-tty.py'), process.execPath, ...flags, filename] :
+      [...flags, filename];
+  const { stdout, stderr } = await common.spawnPromisified(executable, args, options);
+  await assertSnapshot(transform(`${stdout}${stderr}`), filename);
+}
+
+module.exports = {
+  assertSnapshot,
+  getSnapshotPath,
+  replaceNodeVersion,
+  replaceStackTrace,
+  replaceInternalStackTrace,
+  replaceWindowsLineEndings,
+  replaceWindowsPaths,
+  spawnAndAssert,
+  transform,
+  transformProjectRoot,
+};

test/common/benchmark.js

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+'use strict';
+
+const assert = require('assert');
+const fork = require('child_process').fork;
+const path = require('path');
+
+const runjs = path.join(__dirname, '..', '..', 'benchmark', 'run.js');
+
+function runBenchmark(name, env) {
+  const argv = ['test'];
+
+  argv.push(name);
+
+  const mergedEnv = { ...process.env, ...env };
+
+  const child = fork(runjs, argv, {
+    env: mergedEnv,
+    stdio: ['inherit', 'pipe', 'inherit', 'ipc'],
+  });
+  child.stdout.setEncoding('utf8');
+
+  let stdout = '';
+  child.stdout.on('data', (line) => {
+    stdout += line;
+  });
+
+  child.on('exit', (code, signal) => {
+    assert.strictEqual(code, 0);
+    assert.strictEqual(signal, null);
+
+    // This bit makes sure that each benchmark file is being sent settings such
+    // that the benchmark file runs just one set of options. This helps keep the
+    // benchmark tests from taking a long time to run. Therefore, stdout should be composed as follows:
+    // The first and last lines should be empty.
+    // Each test should be separated by a blank line.
+    // The first line of each test should contain the test's name.
+    // The second line of each test should contain the configuration for the test.
+    // If the test configuration is not a group, there should be exactly two lines.
+    // Otherwise, it is possible to have more than two lines.
+
+    const splitTests = stdout.split(/\n\s*\n/);
+
+    for (let testIdx = 1; testIdx < splitTests.length - 1; testIdx++) {
+      const lines = splitTests[testIdx].split('\n');
+      assert.ok(/.+/.test(lines[0]));
+
+      if (!lines[1].includes('group="')) {
+        assert.strictEqual(lines.length, 2, `benchmark file not running exactly one configuration in test: ${stdout}`);
+      }
+    }
+  });
+}
+
+module.exports = runBenchmark;

test/common/child_process.js

@@ -0,0 +1,156 @@
+'use strict';
+
+const assert = require('assert');
+const { spawnSync, execFileSync } = require('child_process');
+const common = require('./');
+const util = require('util');
+
+// Workaround for Windows Server 2008R2
+// When CMD is used to launch a process and CMD is killed too quickly, the
+// process can stay behind running in suspended state, never completing.
+function cleanupStaleProcess(filename) {
+  if (!common.isWindows) {
+    return;
+  }
+  process.once('beforeExit', () => {
+    const basename = filename.replace(/.*[/\\]/g, '');
+    try {
+      execFileSync(`${process.env.SystemRoot}\\System32\\wbem\\WMIC.exe`, [
+        'process',
+        'where',
+        `commandline like '%${basename}%child'`,
+        'delete',
+        '/nointeractive',
+      ]);
+    } catch {
+      // Ignore failures, there might not be any stale process to clean up.
+    }
+  });
+}
+
+// This should keep the child process running long enough to expire
+// the timeout.
+const kExpiringChildRunTime = common.platformTimeout(20 * 1000);
+const kExpiringParentTimer = 1;
+assert(kExpiringChildRunTime > kExpiringParentTimer);
+
+function logAfterTime(time) {
+  setTimeout(() => {
+    // The following console statements are part of the test.
+    console.log('child stdout');
+    console.error('child stderr');
+  }, time);
+}
+
+function checkOutput(str, check) {
+  if ((check instanceof RegExp && !check.test(str)) ||
+    (typeof check === 'string' && check !== str)) {
+    return { passed: false, reason: `did not match ${util.inspect(check)}` };
+  }
+  if (typeof check === 'function') {
+    try {
+      check(str);
+    } catch (error) {
+      return {
+        passed: false,
+        reason: `did not match expectation, checker throws:\n${util.inspect(error)}`,
+      };
+    }
+  }
+  return { passed: true };
+}
+
+function expectSyncExit(caller, spawnArgs, {
+  status,
+  signal,
+  stderr: stderrCheck,
+  stdout: stdoutCheck,
+  trim = false,
+}) {
+  const child = spawnSync(...spawnArgs);
+  const failures = [];
+  let stderrStr, stdoutStr;
+  if (status !== undefined && child.status !== status) {
+    failures.push(`- process terminated with status ${child.status}, expected ${status}`);
+  }
+  if (signal !== undefined && child.signal !== signal) {
+    failures.push(`- process terminated with signal ${child.signal}, expected ${signal}`);
+  }
+
+  function logAndThrow() {
+    const tag = `[process ${child.pid}]:`;
+    console.error(`${tag} --- stderr ---`);
+    console.error(stderrStr === undefined ? child.stderr.toString() : stderrStr);
+    console.error(`${tag} --- stdout ---`);
+    console.error(stdoutStr === undefined ? child.stdout.toString() : stdoutStr);
+    console.error(`${tag} status = ${child.status}, signal = ${child.signal}`);
+
+    const error = new Error(`${failures.join('\n')}`);
+    if (spawnArgs[2]) {
+      error.options = spawnArgs[2];
+    }
+    let command = spawnArgs[0];
+    if (Array.isArray(spawnArgs[1])) {
+      command += ' ' + spawnArgs[1].join(' ');
+    }
+    error.command = command;
+    Error.captureStackTrace(error, caller);
+    throw error;
+  }
+
+  // If status and signal are not matching expectations, fail early.
+  if (failures.length !== 0) {
+    logAndThrow();
+  }
+
+  if (stderrCheck !== undefined) {
+    stderrStr = child.stderr.toString();
+    const { passed, reason } = checkOutput(trim ? stderrStr.trim() : stderrStr, stderrCheck);
+    if (!passed) {
+      failures.push(`- stderr ${reason}`);
+    }
+  }
+  if (stdoutCheck !== undefined) {
+    stdoutStr = child.stdout.toString();
+    const { passed, reason } = checkOutput(trim ? stdoutStr.trim() : stdoutStr, stdoutCheck);
+    if (!passed) {
+      failures.push(`- stdout ${reason}`);
+    }
+  }
+  if (failures.length !== 0) {
+    logAndThrow();
+  }
+  return { child, stderr: stderrStr, stdout: stdoutStr };
+}
+
+function spawnSyncAndExit(...args) {
+  const spawnArgs = args.slice(0, args.length - 1);
+  const expectations = args[args.length - 1];
+  return expectSyncExit(spawnSyncAndExit, spawnArgs, expectations);
+}
+
+function spawnSyncAndExitWithoutError(...args) {
+  return expectSyncExit(spawnSyncAndExitWithoutError, [...args], {
+    status: 0,
+    signal: null,
+  });
+}
+
+function spawnSyncAndAssert(...args) {
+  const expectations = args.pop();
+  return expectSyncExit(spawnSyncAndAssert, [...args], {
+    status: 0,
+    signal: null,
+    ...expectations,
+  });
+}
+
+module.exports = {
+  cleanupStaleProcess,
+  logAfterTime,
+  kExpiringChildRunTime,
+  kExpiringParentTimer,
+  spawnSyncAndAssert,
+  spawnSyncAndExit,
+  spawnSyncAndExitWithoutError,
+};

test/common/countdown.js

@@ -0,0 +1,28 @@
+'use strict';
+
+const assert = require('assert');
+const kLimit = Symbol('limit');
+const kCallback = Symbol('callback');
+const common = require('./');
+
+class Countdown {
+  constructor(limit, cb) {
+    assert.strictEqual(typeof limit, 'number');
+    assert.strictEqual(typeof cb, 'function');
+    this[kLimit] = limit;
+    this[kCallback] = common.mustCall(cb);
+  }
+
+  dec() {
+    assert(this[kLimit] > 0, 'Countdown expired');
+    if (--this[kLimit] === 0)
+      this[kCallback]();
+    return this[kLimit];
+  }
+
+  get remaining() {
+    return this[kLimit];
+  }
+}
+
+module.exports = Countdown;

test/common/cpu-prof.js

@@ -0,0 +1,50 @@
+'use strict';
+
+require('./');
+const fs = require('fs');
+const path = require('path');
+const assert = require('assert');
+
+function getCpuProfiles(dir) {
+  const list = fs.readdirSync(dir);
+  return list
+    .filter((file) => file.endsWith('.cpuprofile'))
+    .map((file) => path.join(dir, file));
+}
+
+function getFrames(file, suffix) {
+  const data = fs.readFileSync(file, 'utf8');
+  const profile = JSON.parse(data);
+  const frames = profile.nodes.filter((i) => {
+    const frame = i.callFrame;
+    return frame.url.endsWith(suffix);
+  });
+  return { frames, nodes: profile.nodes };
+}
+
+function verifyFrames(output, file, suffix) {
+  const { frames, nodes } = getFrames(file, suffix);
+  if (frames.length === 0) {
+    // Show native debug output and the profile for debugging.
+    console.log(output.stderr.toString());
+    console.log(nodes);
+  }
+  assert.notDeepStrictEqual(frames, []);
+}
+
+// We need to set --cpu-interval to a smaller value to make sure we can
+// find our workload in the samples. 50us should be a small enough sampling
+// interval for this.
+const kCpuProfInterval = 50;
+const env = {
+  ...process.env,
+  NODE_DEBUG_NATIVE: 'INSPECTOR_PROFILER',
+};
+
+module.exports = {
+  getCpuProfiles,
+  kCpuProfInterval,
+  env,
+  getFrames,
+  verifyFrames,
+};

test/common/crypto.js

@@ -0,0 +1,164 @@
+'use strict';
+
+const common = require('../common');
+if (!common.hasCrypto) {
+  common.skip('missing crypto');
+}
+
+const assert = require('assert');
+const crypto = require('crypto');
+const {
+  createSign,
+  createVerify,
+  publicEncrypt,
+  privateDecrypt,
+  sign,
+  verify,
+} = crypto;
+
+// The values below (modp2/modp2buf) are for a 1024 bits long prime from
+// RFC 2412 E.2, see https://tools.ietf.org/html/rfc2412. */
+const modp2buf = Buffer.from([
+  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc9, 0x0f,
+  0xda, 0xa2, 0x21, 0x68, 0xc2, 0x34, 0xc4, 0xc6, 0x62, 0x8b,
+  0x80, 0xdc, 0x1c, 0xd1, 0x29, 0x02, 0x4e, 0x08, 0x8a, 0x67,
+  0xcc, 0x74, 0x02, 0x0b, 0xbe, 0xa6, 0x3b, 0x13, 0x9b, 0x22,
+  0x51, 0x4a, 0x08, 0x79, 0x8e, 0x34, 0x04, 0xdd, 0xef, 0x95,
+  0x19, 0xb3, 0xcd, 0x3a, 0x43, 0x1b, 0x30, 0x2b, 0x0a, 0x6d,
+  0xf2, 0x5f, 0x14, 0x37, 0x4f, 0xe1, 0x35, 0x6d, 0x6d, 0x51,
+  0xc2, 0x45, 0xe4, 0x85, 0xb5, 0x76, 0x62, 0x5e, 0x7e, 0xc6,
+  0xf4, 0x4c, 0x42, 0xe9, 0xa6, 0x37, 0xed, 0x6b, 0x0b, 0xff,
+  0x5c, 0xb6, 0xf4, 0x06, 0xb7, 0xed, 0xee, 0x38, 0x6b, 0xfb,
+  0x5a, 0x89, 0x9f, 0xa5, 0xae, 0x9f, 0x24, 0x11, 0x7c, 0x4b,
+  0x1f, 0xe6, 0x49, 0x28, 0x66, 0x51, 0xec, 0xe6, 0x53, 0x81,
+  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+]);
+
+// Asserts that the size of the given key (in chars or bytes) is within 10% of
+// the expected size.
+function assertApproximateSize(key, expectedSize) {
+  const u = typeof key === 'string' ? 'chars' : 'bytes';
+  const min = Math.floor(0.9 * expectedSize);
+  const max = Math.ceil(1.1 * expectedSize);
+  assert(key.length >= min,
+         `Key (${key.length} ${u}) is shorter than expected (${min} ${u})`);
+  assert(key.length <= max,
+         `Key (${key.length} ${u}) is longer than expected (${max} ${u})`);
+}
+
+// Tests that a key pair can be used for encryption / decryption.
+function testEncryptDecrypt(publicKey, privateKey) {
+  const message = 'Hello Node.js world!';
+  const plaintext = Buffer.from(message, 'utf8');
+  for (const key of [publicKey, privateKey]) {
+    const ciphertext = publicEncrypt(key, plaintext);
+    const received = privateDecrypt(privateKey, ciphertext);
+    assert.strictEqual(received.toString('utf8'), message);
+  }
+}
+
+// Tests that a key pair can be used for signing / verification.
+function testSignVerify(publicKey, privateKey) {
+  const message = Buffer.from('Hello Node.js world!');
+
+  function oldSign(algo, data, key) {
+    return createSign(algo).update(data).sign(key);
+  }
+
+  function oldVerify(algo, data, key, signature) {
+    return createVerify(algo).update(data).verify(key, signature);
+  }
+
+  for (const signFn of [sign, oldSign]) {
+    const signature = signFn('SHA256', message, privateKey);
+    for (const verifyFn of [verify, oldVerify]) {
+      for (const key of [publicKey, privateKey]) {
+        const okay = verifyFn('SHA256', message, key, signature);
+        assert(okay);
+      }
+    }
+  }
+}
+
+// Constructs a regular expression for a PEM-encoded key with the given label.
+function getRegExpForPEM(label, cipher) {
+  const head = `\\-\\-\\-\\-\\-BEGIN ${label}\\-\\-\\-\\-\\-`;
+  const rfc1421Header = cipher == null ? '' :
+    `\nProc-Type: 4,ENCRYPTED\nDEK-Info: ${cipher},[^\n]+\n`;
+  const body = '([a-zA-Z0-9\\+/=]{64}\n)*[a-zA-Z0-9\\+/=]{1,64}';
+  const end = `\\-\\-\\-\\-\\-END ${label}\\-\\-\\-\\-\\-`;
+  return new RegExp(`^${head}${rfc1421Header}\n${body}\n${end}\n$`);
+}
+
+const pkcs1PubExp = getRegExpForPEM('RSA PUBLIC KEY');
+const pkcs1PrivExp = getRegExpForPEM('RSA PRIVATE KEY');
+const pkcs1EncExp = (cipher) => getRegExpForPEM('RSA PRIVATE KEY', cipher);
+const spkiExp = getRegExpForPEM('PUBLIC KEY');
+const pkcs8Exp = getRegExpForPEM('PRIVATE KEY');
+const pkcs8EncExp = getRegExpForPEM('ENCRYPTED PRIVATE KEY');
+const sec1Exp = getRegExpForPEM('EC PRIVATE KEY');
+const sec1EncExp = (cipher) => getRegExpForPEM('EC PRIVATE KEY', cipher);
+
+// Synthesize OPENSSL_VERSION_NUMBER format with the layout 0xMNN00PPSL
+const opensslVersionNumber = (major = 0, minor = 0, patch = 0) => {
+  assert(major >= 0 && major <= 0xf);
+  assert(minor >= 0 && minor <= 0xff);
+  assert(patch >= 0 && patch <= 0xff);
+  return (major << 28) | (minor << 20) | (patch << 4);
+};
+
+let OPENSSL_VERSION_NUMBER;
+const hasOpenSSL = (major = 0, minor = 0, patch = 0) => {
+  if (!common.hasCrypto) return false;
+  if (OPENSSL_VERSION_NUMBER === undefined) {
+    const regexp = /(?<m>\d+)\.(?<n>\d+)\.(?<p>\d+)/;
+    const { m, n, p } = process.versions.openssl.match(regexp).groups;
+    OPENSSL_VERSION_NUMBER = opensslVersionNumber(m, n, p);
+  }
+  return OPENSSL_VERSION_NUMBER >= opensslVersionNumber(major, minor, patch);
+};
+
+let opensslCli = null;
+
+module.exports = {
+  modp2buf,
+  assertApproximateSize,
+  testEncryptDecrypt,
+  testSignVerify,
+  pkcs1PubExp,
+  pkcs1PrivExp,
+  pkcs1EncExp,  // used once
+  spkiExp,
+  pkcs8Exp, // used once
+  pkcs8EncExp,  // used once
+  sec1Exp,
+  sec1EncExp,
+  hasOpenSSL,
+  get hasOpenSSL3() {
+    return hasOpenSSL(3);
+  },
+  // opensslCli defined lazily to reduce overhead of spawnSync
+  get opensslCli() {
+    if (opensslCli !== null) return opensslCli;
+
+    if (process.config.variables.node_shared_openssl) {
+      // Use external command
+      opensslCli = 'openssl';
+    } else {
+      const path = require('path');
+      // Use command built from sources included in Node.js repository
+      opensslCli = path.join(path.dirname(process.execPath), 'openssl-cli');
+    }
+
+    if (exports.isWindows) opensslCli += '.exe';
+
+    const { spawnSync } = require('child_process');
+
+    const opensslCmd = spawnSync(opensslCli, ['version']);
+    if (opensslCmd.status !== 0 || opensslCmd.error !== undefined) {
+      // OpenSSL command cannot be executed
+      opensslCli = false;
+    }
+    return opensslCli;
+  },
+};

test/common/debugger.js

@@ -0,0 +1,184 @@
+'use strict';
+const common = require('../common');
+const spawn = require('child_process').spawn;
+
+const BREAK_MESSAGE = new RegExp('(?:' + [
+  'assert', 'break', 'break on start', 'debugCommand',
+  'exception', 'other', 'promiseRejection', 'step',
+].join('|') + ') in', 'i');
+
+// Some macOS machines require more time to receive the outputs from the client.
+let TIMEOUT = common.platformTimeout(10000);
+if (common.isWindows) {
+  // Some of the windows machines in the CI need more time to receive
+  // the outputs from the client.
+  // https://github.com/nodejs/build/issues/3014
+  TIMEOUT = common.platformTimeout(15000);
+}
+
+function isPreBreak(output) {
+  return /Break on start/.test(output) && /1 \(function \(exports/.test(output);
+}
+
+function startCLI(args, flags = [], spawnOpts = {}) {
+  let stderrOutput = '';
+  const child =
+    spawn(process.execPath, [...flags, 'inspect', ...args], spawnOpts);
+
+  const outputBuffer = [];
+  function bufferOutput(chunk) {
+    if (this === child.stderr) {
+      stderrOutput += chunk;
+    }
+    outputBuffer.push(chunk);
+  }
+
+  function getOutput() {
+    return outputBuffer.join('\n').replaceAll('\b', '');
+  }
+
+  child.stdout.setEncoding('utf8');
+  child.stdout.on('data', bufferOutput);
+  child.stderr.setEncoding('utf8');
+  child.stderr.on('data', bufferOutput);
+
+  if (process.env.VERBOSE === '1') {
+    child.stdout.pipe(process.stdout);
+    child.stderr.pipe(process.stderr);
+  }
+
+  return {
+    flushOutput() {
+      const output = this.output;
+      outputBuffer.length = 0;
+      return output;
+    },
+
+    waitFor(pattern) {
+      function checkPattern(str) {
+        if (Array.isArray(pattern)) {
+          return pattern.every((p) => p.test(str));
+        }
+        return pattern.test(str);
+      }
+
+      return new Promise((resolve, reject) => {
+        function checkOutput() {
+          if (checkPattern(getOutput())) {
+            tearDown();
+            resolve();
+          }
+        }
+
+        function onChildClose(code, signal) {
+          tearDown();
+          let message = 'Child exited';
+          if (code) {
+            message += `, code ${code}`;
+          }
+          if (signal) {
+            message += `, signal ${signal}`;
+          }
+          message += ` while waiting for ${pattern}; found: ${this.output}`;
+          if (stderrOutput) {
+            message += `\n STDERR: ${stderrOutput}`;
+          }
+          reject(new Error(message));
+        }
+
+        const timer = setTimeout(() => {
+          tearDown();
+          reject(new Error([
+            `Timeout (${TIMEOUT}) while waiting for ${pattern}`,
+            `found: ${this.output}`,
+          ].join('; ')));
+        }, TIMEOUT);
+
+        function tearDown() {
+          clearTimeout(timer);
+          child.stdout.removeListener('data', checkOutput);
+          child.removeListener('close', onChildClose);
+        }
+
+        child.on('close', onChildClose);
+        child.stdout.on('data', checkOutput);
+        checkOutput();
+      });
+    },
+
+    waitForPrompt() {
+      return this.waitFor(/>\s+$/);
+    },
+
+    async waitForInitialBreak() {
+      await this.waitFor(/break (?:on start )?in/i);
+
+      if (isPreBreak(this.output)) {
+        await this.command('next', false);
+        return this.waitFor(/break in/);
+      }
+    },
+
+    get breakInfo() {
+      const output = this.output;
+      const breakMatch =
+        output.match(/(step |break (?:on start )?)in ([^\n]+):(\d+)\n/i);
+
+      if (breakMatch === null) {
+        throw new Error(
+          `Could not find breakpoint info in ${JSON.stringify(output)}`);
+      }
+      return { filename: breakMatch[2], line: +breakMatch[3] };
+    },
+
+    ctrlC() {
+      return this.command('.interrupt');
+    },
+
+    get output() {
+      return getOutput();
+    },
+
+    get rawOutput() {
+      return outputBuffer.join('').toString();
+    },
+
+    parseSourceLines() {
+      return getOutput().split('\n')
+        .map((line) => line.match(/(?:\*|>)?\s*(\d+)/))
+        .filter((match) => match !== null)
+        .map((match) => +match[1]);
+    },
+
+    writeLine(input, flush = true) {
+      if (flush) {
+        this.flushOutput();
+      }
+      if (process.env.VERBOSE === '1') {
+        process.stderr.write(`< ${input}\n`);
+      }
+      child.stdin.write(input);
+      child.stdin.write('\n');
+    },
+
+    command(input, flush = true) {
+      this.writeLine(input, flush);
+      return this.waitForPrompt();
+    },
+
+    stepCommand(input) {
+      this.writeLine(input, true);
+      return this
+        .waitFor(BREAK_MESSAGE)
+        .then(() => this.waitForPrompt());
+    },
+
+    quit() {
+      return new Promise((resolve) => {
+        child.stdin.end();
+        child.on('close', resolve);
+      });
+    },
+  };
+}
+module.exports = startCLI;

test/common/dns.js

@@ -0,0 +1,341 @@
+'use strict';
+
+const assert = require('assert');
+const os = require('os');
+const { isIP } = require('net');
+
+const types = {
+  A: 1,
+  AAAA: 28,
+  NS: 2,
+  CNAME: 5,
+  SOA: 6,
+  PTR: 12,
+  MX: 15,
+  TXT: 16,
+  ANY: 255,
+  CAA: 257,
+};
+
+const classes = {
+  IN: 1,
+};
+
+// Naïve DNS parser/serializer.
+
+function readDomainFromPacket(buffer, offset) {
+  assert.ok(offset < buffer.length);
+  const length = buffer[offset];
+  if (length === 0) {
+    return { nread: 1, domain: '' };
+  } else if ((length & 0xC0) === 0) {
+    offset += 1;
+    const chunk = buffer.toString('ascii', offset, offset + length);
+    // Read the rest of the domain.
+    const { nread, domain } = readDomainFromPacket(buffer, offset + length);
+    return {
+      nread: 1 + length + nread,
+      domain: domain ? `${chunk}.${domain}` : chunk,
+    };
+  }
+  // Pointer to another part of the packet.
+  assert.strictEqual(length & 0xC0, 0xC0);
+  // eslint-disable-next-line @stylistic/js/space-infix-ops, @stylistic/js/space-unary-ops
+  const pointeeOffset = buffer.readUInt16BE(offset) &~ 0xC000;
+  return {
+    nread: 2,
+    domain: readDomainFromPacket(buffer, pointeeOffset),
+  };
+}
+
+function parseDNSPacket(buffer) {
+  assert.ok(buffer.length > 12);
+
+  const parsed = {
+    id: buffer.readUInt16BE(0),
+    flags: buffer.readUInt16BE(2),
+  };
+
+  const counts = [
+    ['questions', buffer.readUInt16BE(4)],
+    ['answers', buffer.readUInt16BE(6)],
+    ['authorityAnswers', buffer.readUInt16BE(8)],
+    ['additionalRecords', buffer.readUInt16BE(10)],
+  ];
+
+  let offset = 12;
+  for (const [ sectionName, count ] of counts) {
+    parsed[sectionName] = [];
+    for (let i = 0; i < count; ++i) {
+      const { nread, domain } = readDomainFromPacket(buffer, offset);
+      offset += nread;
+
+      const type = buffer.readUInt16BE(offset);
+
+      const rr = {
+        domain,
+        cls: buffer.readUInt16BE(offset + 2),
+      };
+      offset += 4;
+
+      for (const name in types) {
+        if (types[name] === type)
+          rr.type = name;
+      }
+
+      if (sectionName !== 'questions') {
+        rr.ttl = buffer.readInt32BE(offset);
+        const dataLength = buffer.readUInt16BE(offset);
+        offset += 6;
+
+        switch (type) {
+          case types.A:
+            assert.strictEqual(dataLength, 4);
+            rr.address = `${buffer[offset + 0]}.${buffer[offset + 1]}.` +
+                         `${buffer[offset + 2]}.${buffer[offset + 3]}`;
+            break;
+          case types.AAAA:
+            assert.strictEqual(dataLength, 16);
+            rr.address = buffer.toString('hex', offset, offset + 16)
+                               .replace(/(.{4}(?!$))/g, '$1:');
+            break;
+          case types.TXT:
+          {
+            let position = offset;
+            rr.entries = [];
+            while (position < offset + dataLength) {
+              const txtLength = buffer[offset];
+              rr.entries.push(buffer.toString('utf8',
+                                              position + 1,
+                                              position + 1 + txtLength));
+              position += 1 + txtLength;
+            }
+            assert.strictEqual(position, offset + dataLength);
+            break;
+          }
+          case types.MX:
+          {
+            rr.priority = buffer.readInt16BE(buffer, offset);
+            offset += 2;
+            const { nread, domain } = readDomainFromPacket(buffer, offset);
+            rr.exchange = domain;
+            assert.strictEqual(nread, dataLength);
+            break;
+          }
+          case types.NS:
+          case types.CNAME:
+          case types.PTR:
+          {
+            const { nread, domain } = readDomainFromPacket(buffer, offset);
+            rr.value = domain;
+            assert.strictEqual(nread, dataLength);
+            break;
+          }
+          case types.SOA:
+          {
+            const mname = readDomainFromPacket(buffer, offset);
+            const rname = readDomainFromPacket(buffer, offset + mname.nread);
+            rr.nsname = mname.domain;
+            rr.hostmaster = rname.domain;
+            const trailerOffset = offset + mname.nread + rname.nread;
+            rr.serial = buffer.readUInt32BE(trailerOffset);
+            rr.refresh = buffer.readUInt32BE(trailerOffset + 4);
+            rr.retry = buffer.readUInt32BE(trailerOffset + 8);
+            rr.expire = buffer.readUInt32BE(trailerOffset + 12);
+            rr.minttl = buffer.readUInt32BE(trailerOffset + 16);
+
+            assert.strictEqual(trailerOffset + 20, dataLength);
+            break;
+          }
+          default:
+            throw new Error(`Unknown RR type ${rr.type}`);
+        }
+        offset += dataLength;
+      }
+
+      parsed[sectionName].push(rr);
+
+      assert.ok(offset <= buffer.length);
+    }
+  }
+
+  assert.strictEqual(offset, buffer.length);
+  return parsed;
+}
+
+function writeIPv6(ip) {
+  const parts = ip.replace(/^:|:$/g, '').split(':');
+  const buf = Buffer.alloc(16);
+
+  let offset = 0;
+  for (const part of parts) {
+    if (part === '') {
+      offset += 16 - 2 * (parts.length - 1);
+    } else {
+      buf.writeUInt16BE(parseInt(part, 16), offset);
+      offset += 2;
+    }
+  }
+
+  return buf;
+}
+
+function writeDomainName(domain) {
+  return Buffer.concat(domain.split('.').map((label) => {
+    assert(label.length < 64);
+    return Buffer.concat([
+      Buffer.from([label.length]),
+      Buffer.from(label, 'ascii'),
+    ]);
+  }).concat([Buffer.alloc(1)]));
+}
+
+function writeDNSPacket(parsed) {
+  const buffers = [];
+  const kStandardResponseFlags = 0x8180;
+
+  buffers.push(new Uint16Array([
+    parsed.id,
+    parsed.flags ?? kStandardResponseFlags,
+    parsed.questions?.length,
+    parsed.answers?.length,
+    parsed.authorityAnswers?.length,
+    parsed.additionalRecords?.length,
+  ]));
+
+  for (const q of parsed.questions) {
+    assert(types[q.type]);
+    buffers.push(writeDomainName(q.domain));
+    buffers.push(new Uint16Array([
+      types[q.type],
+      q.cls === undefined ? classes.IN : q.cls,
+    ]));
+  }
+
+  for (const rr of [].concat(parsed.answers,
+                             parsed.authorityAnswers,
+                             parsed.additionalRecords)) {
+    if (!rr) continue;
+
+    assert(types[rr.type]);
+    buffers.push(writeDomainName(rr.domain));
+    buffers.push(new Uint16Array([
+      types[rr.type],
+      rr.cls === undefined ? classes.IN : rr.cls,
+    ]));
+    buffers.push(new Int32Array([rr.ttl]));
+
+    const rdLengthBuf = new Uint16Array(1);
+    buffers.push(rdLengthBuf);
+
+    switch (rr.type) {
+      case 'A':
+        rdLengthBuf[0] = 4;
+        buffers.push(new Uint8Array(rr.address.split('.')));
+        break;
+      case 'AAAA':
+        rdLengthBuf[0] = 16;
+        buffers.push(writeIPv6(rr.address));
+        break;
+      case 'TXT': {
+        const total = rr.entries.map((s) => s.length).reduce((a, b) => a + b);
+        // Total length of all strings + 1 byte each for their lengths.
+        rdLengthBuf[0] = rr.entries.length + total;
+        for (const txt of rr.entries) {
+          buffers.push(new Uint8Array([Buffer.byteLength(txt)]));
+          buffers.push(Buffer.from(txt));
+        }
+        break;
+      }
+      case 'MX':
+        rdLengthBuf[0] = 2;
+        buffers.push(new Uint16Array([rr.priority]));
+        // fall through
+      case 'NS':
+      case 'CNAME':
+      case 'PTR':
+      {
+        const domain = writeDomainName(rr.exchange || rr.value);
+        rdLengthBuf[0] += domain.length;
+        buffers.push(domain);
+        break;
+      }
+      case 'SOA':
+      {
+        const mname = writeDomainName(rr.nsname);
+        const rname = writeDomainName(rr.hostmaster);
+        rdLengthBuf[0] = mname.length + rname.length + 20;
+        buffers.push(mname, rname);
+        buffers.push(new Uint32Array([
+          rr.serial, rr.refresh, rr.retry, rr.expire, rr.minttl,
+        ]));
+        break;
+      }
+      case 'CAA':
+      {
+        rdLengthBuf[0] = 5 + rr.issue.length + 2;
+        buffers.push(Buffer.from([Number(rr.critical)]));
+        buffers.push(Buffer.from([Number(5)]));
+        buffers.push(Buffer.from('issue' + rr.issue));
+        break;
+      }
+      default:
+        throw new Error(`Unknown RR type ${rr.type}`);
+    }
+  }
+
+  return Buffer.concat(buffers.map((typedArray) => {
+    const buf = Buffer.from(typedArray.buffer,
+                            typedArray.byteOffset,
+                            typedArray.byteLength);
+    if (os.endianness() === 'LE') {
+      if (typedArray.BYTES_PER_ELEMENT === 2) buf.swap16();
+      if (typedArray.BYTES_PER_ELEMENT === 4) buf.swap32();
+    }
+    return buf;
+  }));
+}
+
+const mockedErrorCode = 'ENOTFOUND';
+const mockedSysCall = 'getaddrinfo';
+
+function errorLookupMock(code = mockedErrorCode, syscall = mockedSysCall) {
+  return function lookupWithError(hostname, dnsopts, cb) {
+    const err = new Error(`${syscall} ${code} ${hostname}`);
+    err.code = code;
+    err.errno = code;
+    err.syscall = syscall;
+    err.hostname = hostname;
+    cb(err);
+  };
+}
+
+function createMockedLookup(...addresses) {
+  addresses = addresses.map((address) => ({ address: address, family: isIP(address) }));
+
+  // Create a DNS server which replies with a AAAA and a A record for the same host
+  return function lookup(hostname, options, cb) {
+    if (options.all === true) {
+      process.nextTick(() => {
+        cb(null, addresses);
+      });
+
+      return;
+    }
+
+    process.nextTick(() => {
+      cb(null, addresses[0].address, addresses[0].family);
+    });
+  };
+}
+
+module.exports = {
+  types,
+  classes,
+  writeDNSPacket,
+  parseDNSPacket,
+  errorLookupMock,
+  mockedErrorCode,
+  mockedSysCall,
+  createMockedLookup,
+};

test/common/fixtures.js

@@ -0,0 +1,59 @@
+'use strict';
+
+const path = require('path');
+const fs = require('fs');
+const { pathToFileURL } = require('url');
+
+const fixturesDir = path.join(__dirname, '..', 'fixtures');
+
+function fixturesPath(...args) {
+  return path.join(fixturesDir, ...args);
+}
+
+function fixturesFileURL(...args) {
+  return pathToFileURL(fixturesPath(...args));
+}
+
+function readFixtureSync(args, enc) {
+  if (Array.isArray(args))
+    return fs.readFileSync(fixturesPath(...args), enc);
+  return fs.readFileSync(fixturesPath(args), enc);
+}
+
+function readFixtureKey(name, enc) {
+  return fs.readFileSync(fixturesPath('keys', name), enc);
+}
+
+function readFixtureKeys(enc, ...names) {
+  return names.map((name) => readFixtureKey(name, enc));
+}
+
+// This should be in sync with test/fixtures/utf8_test_text.txt.
+// We copy them here as a string because this is supposed to be used
+// in fs API tests.
+const utf8TestText = '永和九年，嵗在癸丑，暮春之初，會於會稽山隂之蘭亭，脩稧事也。' +
+                     '羣賢畢至，少長咸集。此地有崇山峻領，茂林脩竹；又有清流激湍，' +
+                     '暎帶左右。引以為流觴曲水，列坐其次。雖無絲竹管弦之盛，一觴一詠，' +
+                     '亦足以暢敘幽情。是日也，天朗氣清，恵風和暢；仰觀宇宙之大，' +
+                     '俯察品類之盛；所以遊目騁懐，足以極視聽之娛，信可樂也。夫人之相與，' +
+                     '俯仰一世，或取諸懐抱，悟言一室之內，或因寄所託，放浪形骸之外。' +
+                     '雖趣舎萬殊，靜躁不同，當其欣扵所遇，暫得扵己，怏然自足，' +
+                     '不知老之將至。及其所之既惓，情隨事遷，感慨係之矣。向之所欣，' +
+                     '俛仰之閒以為陳跡，猶不能不以之興懐；況脩短隨化，終期扵盡。' +
+                     '古人云：「死生亦大矣。」豈不痛哉！每攬昔人興感之由，若合一契，' +
+                     '未嘗不臨文嗟悼，不能喻之扵懐。固知一死生為虛誕，齊彭殤為妄作。' +
+                     '後之視今，亦由今之視昔，悲夫！故列敘時人，錄其所述，雖世殊事異，' +
+                     '所以興懐，其致一也。後之攬者，亦將有感扵斯文。';
+
+module.exports = {
+  fixturesDir,
+  path: fixturesPath,
+  fileURL: fixturesFileURL,
+  readSync: readFixtureSync,
+  readKey: readFixtureKey,
+  readKeys: readFixtureKeys,
+  utf8TestText,
+  get utf8TestTextPath() {
+    return fixturesPath('utf8_test_text.txt');
+  },
+};

test/common/fixtures.mjs

@@ -0,0 +1,17 @@
+import fixtures from './fixtures.js';
+
+const {
+  fixturesDir,
+  path,
+  fileURL,
+  readSync,
+  readKey,
+} = fixtures;
+
+export {
+  fixturesDir,
+  path,
+  fileURL,
+  readSync,
+  readKey,
+};

test/common/gc.js

@@ -0,0 +1,188 @@
+'use strict';
+
+const wait = require('timers/promises').setTimeout;
+const assert = require('assert');
+const common = require('../common');
+// TODO(joyeecheung): rewrite checkIfCollectable to use this too.
+const { setImmediate: setImmediatePromisified } = require('timers/promises');
+const gcTrackerMap = new WeakMap();
+const gcTrackerTag = 'NODE_TEST_COMMON_GC_TRACKER';
+
+/**
+ * Installs a garbage collection listener for the specified object.
+ * Uses async_hooks for GC tracking, which may affect test functionality.
+ * A full setImmediate() invocation passes between a global.gc() call and the listener being invoked.
+ * @param {object} obj - The target object to track for garbage collection.
+ * @param {object} gcListener - The listener object containing the ongc callback.
+ * @param {Function} gcListener.ongc - The function to call when the target object is garbage collected.
+ */
+function onGC(obj, gcListener) {
+  const async_hooks = require('async_hooks');
+
+  const onGcAsyncHook = async_hooks.createHook({
+    init: common.mustCallAtLeast(function(id, type) {
+      if (this.trackedId === undefined) {
+        assert.strictEqual(type, gcTrackerTag);
+        this.trackedId = id;
+      }
+    }),
+    destroy(id) {
+      assert.notStrictEqual(this.trackedId, -1);
+      if (id === this.trackedId) {
+        this.gcListener.ongc();
+        onGcAsyncHook.disable();
+      }
+    },
+  }).enable();
+  onGcAsyncHook.gcListener = gcListener;
+
+  gcTrackerMap.set(obj, new async_hooks.AsyncResource(gcTrackerTag));
+  obj = null;
+}
+
+/**
+ * Repeatedly triggers garbage collection until a specified condition is met or a maximum number of attempts is reached.
+ * This utillity must be run in a Node.js instance that enables --expose-gc.
+ * @param {string|Function} [name] - Optional name, used in the rejection message if the condition is not met.
+ * @param {Function} condition - A function that returns true when the desired condition is met.
+ * @param {number} maxCount - Maximum number of garbage collections that should be tried.
+ * @param {object} gcOptions - Options to pass into the global gc() function.
+ * @returns {Promise} A promise that resolves when the condition is met, or rejects after 10 failed attempts.
+ */
+async function gcUntil(name, condition, maxCount = 10, gcOptions) {
+  for (let count = 0; count < maxCount; ++count) {
+    await setImmediatePromisified();
+    if (gcOptions) {
+      await global.gc(gcOptions);
+    } else {
+      await global.gc();  // Passing in undefined is not the same as empty.
+    }
+    if (condition()) {
+      return;
+    }
+  }
+  throw new Error(`Test ${name} failed`);
+}
+
+// This function can be used to check if an object factor leaks or not,
+// but it needs to be used with care:
+// 1. The test should be set up with an ideally small
+//   --max-old-space-size or --max-heap-size, which combined with
+//   the maxCount parameter can reproduce a leak of the objects
+//   created by fn().
+// 2. This works under the assumption that if *none* of the objects
+//   created by fn() can be garbage-collected, the test would crash due
+//   to OOM.
+// 3. If *any* of the objects created by fn() can be garbage-collected,
+//   it is considered leak-free. The FinalizationRegistry is used to
+//   terminate the test early once we detect any of the object is
+//   garbage-collected to make the test less prone to false positives.
+//   This may be especially important for memory management relying on
+//   emphemeron GC which can be inefficient to deal with extremely fast
+//   heap growth.
+// Note that this can still produce false positives. When the test using
+// this function still crashes due to OOM, inspect the heap to confirm
+// if a leak is present (e.g. using heap snapshots).
+// The generateSnapshotAt parameter can be used to specify a count
+// interval to create the heap snapshot which may enforce a more thorough GC.
+// This can be tried for code paths that require it for the GC to catch up
+// with heap growth. However this type of forced GC can be in conflict with
+// other logic in V8 such as bytecode aging, and it can slow down the test
+// significantly, so it should be used scarcely and only as a last resort.
+async function checkIfCollectable(
+  fn, maxCount = 4096, generateSnapshotAt = Infinity, logEvery = 128) {
+  let anyFinalized = false;
+  let count = 0;
+
+  const f = new FinalizationRegistry(() => {
+    anyFinalized = true;
+  });
+
+  async function createObject() {
+    const obj = await fn();
+    f.register(obj);
+    if (count++ < maxCount && !anyFinalized) {
+      setImmediate(createObject, 1);
+    }
+    // This can force a more thorough GC, but can slow the test down
+    // significantly in a big heap. Use it with care.
+    if (count % generateSnapshotAt === 0) {
+      // XXX(joyeecheung): This itself can consume a bit of JS heap memory,
+      // but the other alternative writeHeapSnapshot can run into disk space
+      // not enough problems in the CI & be slower depending on file system.
+      // Just do this for now as long as it works and only invent some
+      // internal voodoo when we absolutely have no other choice.
+      require('v8').getHeapSnapshot().pause().read();
+      console.log(`Generated heap snapshot at ${count}`);
+    }
+    if (count % logEvery === 0) {
+      console.log(`Created ${count} objects`);
+    }
+    if (anyFinalized) {
+      console.log(`Found finalized object at ${count}, stop testing`);
+    }
+  }
+
+  createObject();
+}
+
+// Repeat an operation and give GC some breathing room at every iteration.
+async function runAndBreathe(fn, repeat, waitTime = 20) {
+  for (let i = 0; i < repeat; i++) {
+    await fn();
+    await wait(waitTime);
+  }
+}
+
+/**
+ * This requires --expose-internals.
+ * This function can be used to check if an object factory leaks or not by
+ * iterating over the heap and count objects with the specified class
+ * (which is checked by looking up the prototype chain).
+ * @param {(i: number) => number} fn The factory receiving iteration count
+ *   and returning number of objects created. The return value should be
+ *   precise otherwise false negatives can be produced.
+ * @param {Function} ctor The constructor of the objects being counted.
+ * @param {number} count Number of iterations that this check should be done
+ * @param {number} waitTime Optional breathing time for GC.
+ */
+async function checkIfCollectableByCounting(fn, ctor, count, waitTime = 20) {
+  const { queryObjects } = require('v8');
+  const { name } = ctor;
+  const initialCount = queryObjects(ctor, { format: 'count' });
+  console.log(`Initial count of ${name}: ${initialCount}`);
+  let totalCreated = 0;
+  for (let i = 0; i < count; ++i) {
+    const created = await fn(i);
+    totalCreated += created;
+    console.log(`#${i}: created ${created} ${name}, total ${totalCreated}`);
+    await wait(waitTime);  // give GC some breathing room.
+    const currentCount = queryObjects(ctor, { format: 'count' });
+    const collected = totalCreated - (currentCount - initialCount);
+    console.log(`#${i}: counted ${currentCount} ${name}, collected ${collected}`);
+    if (collected > 0) {
+      console.log(`Detected ${collected} collected ${name}, finish early`);
+      return;
+    }
+  }
+
+  await wait(waitTime);  // give GC some breathing room.
+  const currentCount = queryObjects(ctor, { format: 'count' });
+  const collected = totalCreated - (currentCount - initialCount);
+  console.log(`Last count: counted ${currentCount} ${name}, collected ${collected}`);
+  // Some objects with the prototype can be collected.
+  if (collected > 0) {
+    console.log(`Detected ${collected} collected ${name}`);
+    return;
+  }
+
+  throw new Error(`${name} cannot be collected`);
+}
+
+module.exports = {
+  checkIfCollectable,
+  runAndBreathe,
+  checkIfCollectableByCounting,
+  onGC,
+  gcUntil,
+};

test/common/globals.js

@@ -0,0 +1,150 @@
+'use strict';
+
+const intrinsics = new Set([
+  'Object',
+  'Function',
+  'Array',
+  'Number',
+  'parseFloat',
+  'parseInt',
+  'Infinity',
+  'NaN',
+  'undefined',
+  'Boolean',
+  'String',
+  'Symbol',
+  'Date',
+  'Promise',
+  'RegExp',
+  'Error',
+  'AggregateError',
+  'EvalError',
+  'RangeError',
+  'ReferenceError',
+  'SyntaxError',
+  'TypeError',
+  'URIError',
+  'globalThis',
+  'JSON',
+  'Math',
+  'Intl',
+  'ArrayBuffer',
+  'Uint8Array',
+  'Int8Array',
+  'Uint16Array',
+  'Int16Array',
+  'Float16Array',
+  'Uint32Array',
+  'Int32Array',
+  'Float32Array',
+  'Float64Array',
+  'Uint8ClampedArray',
+  'BigUint64Array',
+  'BigInt64Array',
+  'DataView',
+  'Map',
+  'BigInt',
+  'Set',
+  'WeakMap',
+  'WeakSet',
+  'Proxy',
+  'Reflect',
+  'ShadowRealm',
+  'FinalizationRegistry',
+  'WeakRef',
+  'decodeURI',
+  'decodeURIComponent',
+  'encodeURI',
+  'encodeURIComponent',
+  'escape',
+  'unescape',
+  'eval',
+  'isFinite',
+  'isNaN',
+  'SharedArrayBuffer',
+  'Atomics',
+  'WebAssembly',
+  'Iterator',
+  'SuppressedError',
+  'DisposableStack',
+  'AsyncDisposableStack',
+]);
+
+if (global.gc) {
+  intrinsics.add('gc');
+}
+
+// v8 exposes console in the global scope.
+intrinsics.add('console');
+
+const webIdlExposedWildcard = new Set([
+  'DOMException',
+  'TextEncoder',
+  'TextDecoder',
+  'AbortController',
+  'AbortSignal',
+  'CustomEvent',
+  'EventTarget',
+  'Event',
+  'URL',
+  'URLSearchParams',
+  'ReadableStream',
+  'ReadableStreamDefaultReader',
+  'ReadableStreamBYOBReader',
+  'ReadableStreamBYOBRequest',
+  'ReadableByteStreamController',
+  'ReadableStreamDefaultController',
+  'TransformStream',
+  'TransformStreamDefaultController',
+  'WritableStream',
+  'WritableStreamDefaultWriter',
+  'WritableStreamDefaultController',
+  'ByteLengthQueuingStrategy',
+  'CountQueuingStrategy',
+  'TextEncoderStream',
+  'TextDecoderStream',
+  'CompressionStream',
+  'DecompressionStream',
+]);
+
+const webIdlExposedWindow = new Set([
+  'console',
+  'BroadcastChannel',
+  'queueMicrotask',
+  'structuredClone',
+  'MessageChannel',
+  'MessagePort',
+  'MessageEvent',
+  'clearInterval',
+  'clearTimeout',
+  'setInterval',
+  'setTimeout',
+  'atob',
+  'btoa',
+  'Blob',
+  'Performance',
+  'performance',
+  'fetch',
+  'FormData',
+  'Headers',
+  'Request',
+  'Response',
+  'WebSocket',
+  'EventSource',
+  'CloseEvent',
+]);
+
+const nodeGlobals = new Set([
+  'process',
+  'global',
+  'Buffer',
+  'clearImmediate',
+  'setImmediate',
+]);
+
+module.exports = {
+  intrinsics,
+  webIdlExposedWildcard,
+  webIdlExposedWindow,
+  nodeGlobals,
+};

test/common/heap.js

@@ -0,0 +1,344 @@
+'use strict';
+const assert = require('assert');
+const util = require('util');
+
+let _buildEmbedderGraph;
+function buildEmbedderGraph() {
+  if (_buildEmbedderGraph) { return _buildEmbedderGraph(); }
+  let internalBinding;
+  try {
+    internalBinding = require('internal/test/binding').internalBinding;
+  } catch (e) {
+    console.error('The test must be run with `--expose-internals`');
+    throw e;
+  }
+
+  ({ buildEmbedderGraph: _buildEmbedderGraph } = internalBinding('heap_utils'));
+  return _buildEmbedderGraph();
+}
+
+const { getHeapSnapshot } = require('v8');
+
+function createJSHeapSnapshot(stream = getHeapSnapshot()) {
+  stream.pause();
+  const dump = JSON.parse(stream.read());
+  const meta = dump.snapshot.meta;
+
+  const nodes =
+    readHeapInfo(dump.nodes, meta.node_fields, meta.node_types, dump.strings);
+  const edges =
+    readHeapInfo(dump.edges, meta.edge_fields, meta.edge_types, dump.strings);
+
+  for (const node of nodes) {
+    node.incomingEdges = [];
+    node.outgoingEdges = [];
+  }
+
+  let fromNodeIndex = 0;
+  let edgeIndex = 0;
+  for (const { type, name_or_index, to_node } of edges) {
+    while (edgeIndex === nodes[fromNodeIndex].edge_count) {
+      edgeIndex = 0;
+      fromNodeIndex++;
+    }
+    const toNode = nodes[to_node / meta.node_fields.length];
+    const fromNode = nodes[fromNodeIndex];
+    const edge = {
+      type,
+      to: toNode,
+      from: fromNode,
+      name: typeof name_or_index === 'string' ? name_or_index : null,
+    };
+    toNode.incomingEdges.push(edge);
+    fromNode.outgoingEdges.push(edge);
+    edgeIndex++;
+  }
+
+  for (const node of nodes) {
+    assert.strictEqual(node.edge_count, node.outgoingEdges.length,
+                       `${node.edge_count} !== ${node.outgoingEdges.length}`);
+  }
+  return nodes;
+}
+
+function readHeapInfo(raw, fields, types, strings) {
+  const items = [];
+
+  for (let i = 0; i < raw.length; i += fields.length) {
+    const item = {};
+    for (let j = 0; j < fields.length; j++) {
+      const name = fields[j];
+      let type = types[j];
+      if (Array.isArray(type)) {
+        item[name] = type[raw[i + j]];
+      } else if (name === 'name_or_index') {  // type === 'string_or_number'
+        if (item.type === 'element' || item.type === 'hidden')
+          type = 'number';
+        else
+          type = 'string';
+      }
+
+      if (type === 'string') {
+        item[name] = strings[raw[i + j]];
+      } else if (type === 'number' || type === 'node') {
+        item[name] = raw[i + j];
+      }
+    }
+    items.push(item);
+  }
+
+  return items;
+}
+
+function inspectNode(snapshot) {
+  return util.inspect(snapshot, { depth: 4 });
+}
+
+function isEdge(edge, { node_name, edge_name }) {
+  if (edge_name !== undefined && edge.name !== edge_name) {
+    return false;
+  }
+  // From our internal embedded graph
+  if (edge.to.value) {
+    if (edge.to.value.constructor.name !== node_name) {
+      return false;
+    }
+  } else if (edge.to.name !== node_name) {
+    return false;
+  }
+  return true;
+}
+
+class State {
+  constructor(stream) {
+    this.snapshot = createJSHeapSnapshot(stream);
+    this.embedderGraph = buildEmbedderGraph();
+  }
+
+  // Validate the v8 heap snapshot
+  validateSnapshot(rootName, expected, { loose = false } = {}) {
+    const rootNodes = this.snapshot.filter(
+      (node) => node.name === rootName && node.type !== 'string');
+    if (loose) {
+      assert(rootNodes.length >= expected.length,
+             `Expect to find at least ${expected.length} '${rootName}', ` +
+             `found ${rootNodes.length}`);
+    } else {
+      assert.strictEqual(
+        rootNodes.length, expected.length,
+        `Expect to find ${expected.length} '${rootName}', ` +
+        `found ${rootNodes.length}`);
+    }
+
+    for (const expectation of expected) {
+      if (expectation.children) {
+        for (const expectedEdge of expectation.children) {
+          const check = typeof expectedEdge === 'function' ? expectedEdge :
+            (edge) => (isEdge(edge, expectedEdge));
+          const hasChild = rootNodes.some(
+            (node) => node.outgoingEdges.some(check),
+          );
+          // Don't use assert with a custom message here. Otherwise the
+          // inspection in the message is done eagerly and wastes a lot of CPU
+          // time.
+          if (!hasChild) {
+            throw new Error(
+              'expected to find child ' +
+              `${util.inspect(expectedEdge)} in ${inspectNode(rootNodes)}`);
+          }
+        }
+      }
+
+      if (expectation.detachedness !== undefined) {
+        const matchedNodes = rootNodes.filter(
+          (node) => node.detachedness === expectation.detachedness);
+        if (loose) {
+          assert(matchedNodes.length >= rootNodes.length,
+                 `Expect to find at least ${rootNodes.length} with ` +
+                `detachedness ${expectation.detachedness}, ` +
+                `found ${matchedNodes.length}`);
+        } else {
+          assert.strictEqual(
+            matchedNodes.length, rootNodes.length,
+            `Expect to find ${rootNodes.length} with detachedness ` +
+            `${expectation.detachedness},  found ${matchedNodes.length}`);
+        }
+      }
+    }
+  }
+
+  // Validate our internal embedded graph representation
+  validateGraph(rootName, expected, { loose = false } = {}) {
+    const rootNodes = this.embedderGraph.filter(
+      (node) => node.name === rootName,
+    );
+    if (loose) {
+      assert(rootNodes.length >= expected.length,
+             `Expect to find at least ${expected.length} '${rootName}', ` +
+             `found ${rootNodes.length}`);
+    } else {
+      assert.strictEqual(
+        rootNodes.length, expected.length,
+        `Expect to find ${expected.length} '${rootName}', ` +
+        `found ${rootNodes.length}`);
+    }
+    for (const expectation of expected) {
+      if (expectation.children) {
+        for (const expectedEdge of expectation.children) {
+          const check = typeof expectedEdge === 'function' ? expectedEdge :
+            (edge) => (isEdge(edge, expectedEdge));
+          // Don't use assert with a custom message here. Otherwise the
+          // inspection in the message is done eagerly and wastes a lot of CPU
+          // time.
+          const hasChild = rootNodes.some(
+            (node) => node.edges.some(check),
+          );
+          if (!hasChild) {
+            throw new Error(
+              'expected to find child ' +
+              `${util.inspect(expectedEdge)} in ${inspectNode(rootNodes)}`);
+          }
+        }
+      }
+    }
+  }
+
+  validateSnapshotNodes(rootName, expected, { loose = false } = {}) {
+    this.validateSnapshot(rootName, expected, { loose });
+    this.validateGraph(rootName, expected, { loose });
+  }
+}
+
+function recordState(stream = undefined) {
+  return new State(stream);
+}
+
+function validateSnapshotNodes(...args) {
+  return recordState().validateSnapshotNodes(...args);
+}
+
+/**
+ * A alternative heap snapshot validator that can be used to verify cppgc-managed nodes.
+ * Modified from
+ * https://chromium.googlesource.com/v8/v8/+/b00e995fb212737802810384ba2b868d0d92f7e5/test/unittests/heap/cppgc-js/unified-heap-snapshot-unittest.cc#134
+ * @param {object[]} nodes Snapshot nodes returned by createJSHeapSnapshot() or a subset filtered from it.
+ * @param {string} rootName Name of the root node. Typically a class name used to filter all native nodes with
+ *                          this name. For cppgc-managed objects, this is typically the name configured by
+ *                          SET_CPPGC_NAME() prefixed with an additional "Node /" prefix e.g.
+ *                          "Node / ContextifyScript"
+ * @param {[{
+ *   node_name?: string,
+ *   edge_name?: string,
+ *   node_type?: string,
+ *   edge_type?: string,
+ * }]} retainingPath The retaining path specification to search from the root nodes.
+ * @param {boolean} allowEmpty Whether the function should fail if no matching nodes can be found.
+ * @returns {[object]} All the leaf nodes matching the retaining path specification. If none can be found,
+ *                     logs the nodes found in the last matching step of the path (if any), and throws an
+ *                     assertion error.
+ */
+function validateByRetainingPathFromNodes(nodes, rootName, retainingPath, allowEmpty = false) {
+  let haystack = nodes.filter((n) => n.name === rootName && n.type !== 'string');
+
+  for (let i = 0; i < retainingPath.length; ++i) {
+    const expected = retainingPath[i];
+    const newHaystack = [];
+
+    for (const parent of haystack) {
+      for (let j = 0; j < parent.outgoingEdges.length; j++) {
+        const edge = parent.outgoingEdges[j];
+        // The strings are represented as { type: 'string', name: '<string content>' } in the snapshot.
+        // Ignore them or we'll poke into strings that are just referenced as names of real nodes,
+        // unless the caller is specifically looking for string nodes via `node_type`.
+        let match = (edge.to.type !== 'string');
+        if (expected.node_type) {
+          match = (edge.to.type === expected.node_type);
+        }
+        if (expected.node_name && edge.to.name !== expected.node_name) {
+          match = false;
+        }
+        if (expected.edge_name && edge.name !== expected.edge_name) {
+          match = false;
+        }
+        if (expected.edge_type && edge.type !== expected.type) {
+          match = false;
+        }
+        if (match) {
+          newHaystack.push(edge.to);
+        }
+      }
+    }
+
+    if (newHaystack.length === 0) {
+      if (allowEmpty) {
+        return [];
+      }
+      const format = (val) => util.inspect(val, { breakLength: 128, depth: 3 });
+      console.error('#');
+      console.error('# Retaining path to search for:');
+      for (let j = 0; j < retainingPath.length; ++j) {
+        console.error(`# - '${format(retainingPath[j])}'${i === j ? '\t<--- not found' : ''}`);
+      }
+      console.error('#\n');
+      console.error('# Nodes found in the last step include:');
+      for (let j = 0; j < haystack.length; ++j) {
+        console.error(`# - '${format(haystack[j])}`);
+      }
+
+      assert.fail(`Could not find target edge ${format(expected)} in the heap snapshot.`);
+
+    }
+
+    haystack = newHaystack;
+  }
+
+  return haystack;
+}
+
+function getHeapSnapshotOptionTests() {
+  const fixtures = require('../common/fixtures');
+  const cases = [
+    {
+      options: { exposeInternals: true },
+      expected: [{
+        children: [
+          // We don't have anything special to test here yet
+          // because we don't use cppgc or embedder heap tracer.
+          { edge_name: 'nonNumeric', node_name: 'test' },
+        ],
+      }],
+    },
+    {
+      options: { exposeNumericValues: true },
+      expected: [{
+        children: [
+          { edge_name: 'numeric', node_name: 'smi number' },
+        ],
+      }],
+    },
+  ];
+  return {
+    fixtures: fixtures.path('klass-with-fields.js'),
+    check(snapshot, expected) {
+      snapshot.validateSnapshot('Klass', expected, { loose: true });
+    },
+    cases,
+  };
+}
+
+/**
+ * Similar to @see {validateByRetainingPathFromNodes} but creates the snapshot from scratch.
+ */
+function validateByRetainingPath(...args) {
+  const nodes = createJSHeapSnapshot();
+  return validateByRetainingPathFromNodes(nodes, ...args);
+}
+
+module.exports = {
+  recordState,
+  validateSnapshotNodes,
+  validateByRetainingPath,
+  validateByRetainingPathFromNodes,
+  getHeapSnapshotOptionTests,
+  createJSHeapSnapshot,
+};

test/common/hijackstdio.js

@@ -0,0 +1,32 @@
+'use strict';
+
+// Hijack stdout and stderr
+const stdWrite = {};
+function hijackStdWritable(name, listener) {
+  const stream = process[name];
+  const _write = stdWrite[name] = stream.write;
+
+  stream.writeTimes = 0;
+  stream.write = function(data, callback) {
+    try {
+      listener(data);
+    } catch (e) {
+      process.nextTick(() => { throw e; });
+    }
+
+    _write.call(stream, data, callback);
+    stream.writeTimes++;
+  };
+}
+
+function restoreWritable(name) {
+  process[name].write = stdWrite[name];
+  delete process[name].writeTimes;
+}
+
+module.exports = {
+  hijackStdout: hijackStdWritable.bind(null, 'stdout'),
+  hijackStderr: hijackStdWritable.bind(null, 'stderr'),
+  restoreStdout: restoreWritable.bind(null, 'stdout'),
+  restoreStderr: restoreWritable.bind(null, 'stderr'),
+};

test/common/http2.js

@@ -0,0 +1,129 @@
+'use strict';
+
+// An HTTP/2 testing tool used to create mock frames for direct testing
+// of HTTP/2 endpoints.
+
+const kFrameData = Symbol('frame-data');
+const FLAG_EOS = 0x1;
+const FLAG_ACK = 0x1;
+const FLAG_EOH = 0x4;
+const FLAG_PADDED = 0x8;
+const PADDING = Buffer.alloc(255);
+
+const kClientMagic = Buffer.from('505249202a20485454502f322' +
+                                 'e300d0a0d0a534d0d0a0d0a', 'hex');
+
+const kFakeRequestHeaders = Buffer.from('828684410f7777772e65' +
+                                        '78616d706c652e636f6d', 'hex');
+
+
+const kFakeResponseHeaders = Buffer.from('4803333032580770726976617465611d' +
+                                         '4d6f6e2c203231204f63742032303133' +
+                                         '2032303a31333a323120474d546e1768' +
+                                         '747470733a2f2f7777772e6578616d70' +
+                                         '6c652e636f6d', 'hex');
+
+function isUint32(val) {
+  return val >>> 0 === val;
+}
+
+function isUint24(val) {
+  return val >>> 0 === val && val <= 0xFFFFFF;
+}
+
+function isUint8(val) {
+  return val >>> 0 === val && val <= 0xFF;
+}
+
+function write32BE(array, pos, val) {
+  if (!isUint32(val))
+    throw new RangeError('val is not a 32-bit number');
+  array[pos++] = (val >> 24) & 0xff;
+  array[pos++] = (val >> 16) & 0xff;
+  array[pos++] = (val >> 8) & 0xff;
+  array[pos++] = val & 0xff;
+}
+
+function write24BE(array, pos, val) {
+  if (!isUint24(val))
+    throw new RangeError('val is not a 24-bit number');
+  array[pos++] = (val >> 16) & 0xff;
+  array[pos++] = (val >> 8) & 0xff;
+  array[pos++] = val & 0xff;
+}
+
+function write8(array, pos, val) {
+  if (!isUint8(val))
+    throw new RangeError('val is not an 8-bit number');
+  array[pos] = val;
+}
+
+class Frame {
+  constructor(length, type, flags, id) {
+    this[kFrameData] = Buffer.alloc(9);
+    write24BE(this[kFrameData], 0, length);
+    write8(this[kFrameData], 3, type);
+    write8(this[kFrameData], 4, flags);
+    write32BE(this[kFrameData], 5, id);
+  }
+
+  get data() {
+    return this[kFrameData];
+  }
+}
+
+class SettingsFrame extends Frame {
+  constructor(ack = false) {
+    let flags = 0;
+    if (ack)
+      flags |= FLAG_ACK;
+    super(0, 4, flags, 0);
+  }
+}
+
+class HeadersFrame extends Frame {
+  constructor(id, payload, padlen = 0, final = false) {
+    let len = payload.length;
+    let flags = FLAG_EOH;
+    if (final) flags |= FLAG_EOS;
+    const buffers = [payload];
+    if (padlen > 0) {
+      buffers.unshift(Buffer.from([padlen]));
+      buffers.push(PADDING.slice(0, padlen));
+      len += padlen + 1;
+      flags |= FLAG_PADDED;
+    }
+    super(len, 1, flags, id);
+    buffers.unshift(this[kFrameData]);
+    this[kFrameData] = Buffer.concat(buffers);
+  }
+}
+
+class PingFrame extends Frame {
+  constructor(ack = false) {
+    const buffers = [Buffer.alloc(8)];
+    super(8, 6, ack ? 1 : 0, 0);
+    buffers.unshift(this[kFrameData]);
+    this[kFrameData] = Buffer.concat(buffers);
+  }
+}
+
+class AltSvcFrame extends Frame {
+  constructor(size) {
+    const buffers = [Buffer.alloc(size)];
+    super(size, 10, 0, 0);
+    buffers.unshift(this[kFrameData]);
+    this[kFrameData] = Buffer.concat(buffers);
+  }
+}
+
+module.exports = {
+  Frame,
+  AltSvcFrame,
+  HeadersFrame,
+  SettingsFrame,
+  PingFrame,
+  kFakeRequestHeaders,
+  kFakeResponseHeaders,
+  kClientMagic,
+};

test/common/index.mjs

@@ -0,0 +1,100 @@
+import { createRequire } from 'module';
+
+const require = createRequire(import.meta.url);
+const common = require('./index.js');
+
+const {
+  allowGlobals,
+  buildType,
+  canCreateSymLink,
+  childShouldThrowAndAbort,
+  enoughTestMem,
+  escapePOSIXShell,
+  expectsError,
+  expectWarning,
+  getArrayBufferViews,
+  getBufferSources,
+  getTTYfd,
+  hasCrypto,
+  hasSQLite,
+  hasIntl,
+  hasIPv6,
+  isAIX,
+  isAlive,
+  isFreeBSD,
+  isIBMi,
+  isInsideDirWithUnusualChars,
+  isLinux,
+  isOpenBSD,
+  isMacOS,
+  isSunOS,
+  isWindows,
+  localIPv6Hosts,
+  mustCall,
+  mustCallAtLeast,
+  mustNotCall,
+  mustNotMutateObjectDeep,
+  mustSucceed,
+  nodeProcessAborted,
+  parseTestFlags,
+  PIPE,
+  platformTimeout,
+  printSkipMessage,
+  runWithInvalidFD,
+  skip,
+  skipIf32Bits,
+  skipIfEslintMissing,
+  skipIfInspectorDisabled,
+  skipIfSQLiteMissing,
+  spawnPromisified,
+} = common;
+
+const getPort = () => common.PORT;
+
+export {
+  allowGlobals,
+  buildType,
+  canCreateSymLink,
+  childShouldThrowAndAbort,
+  createRequire,
+  enoughTestMem,
+  escapePOSIXShell,
+  expectsError,
+  expectWarning,
+  getArrayBufferViews,
+  getBufferSources,
+  getPort,
+  getTTYfd,
+  hasCrypto,
+  hasSQLite,
+  hasIntl,
+  hasIPv6,
+  isAIX,
+  isAlive,
+  isFreeBSD,
+  isIBMi,
+  isInsideDirWithUnusualChars,
+  isLinux,
+  isOpenBSD,
+  isMacOS,
+  isSunOS,
+  isWindows,
+  localIPv6Hosts,
+  mustCall,
+  mustCallAtLeast,
+  mustNotCall,
+  mustNotMutateObjectDeep,
+  mustSucceed,
+  nodeProcessAborted,
+  parseTestFlags,
+  PIPE,
+  platformTimeout,
+  printSkipMessage,
+  runWithInvalidFD,
+  skip,
+  skipIf32Bits,
+  skipIfEslintMissing,
+  skipIfInspectorDisabled,
+  skipIfSQLiteMissing,
+  spawnPromisified,
+};

test/common/inspector-helper.js

@@ -0,0 +1,576 @@
+'use strict';
+const common = require('../common');
+const assert = require('assert');
+const fs = require('fs');
+const http = require('http');
+const fixtures = require('../common/fixtures');
+const { spawn } = require('child_process');
+const { URL, pathToFileURL } = require('url');
+const { EventEmitter, once } = require('events');
+
+const _MAINSCRIPT = fixtures.path('loop.js');
+const DEBUG = false;
+const TIMEOUT = common.platformTimeout(15 * 1000);
+
+function spawnChildProcess(inspectorFlags, scriptContents, scriptFile) {
+  const args = [].concat(inspectorFlags);
+  if (scriptContents) {
+    args.push('-e', scriptContents);
+  } else {
+    args.push(scriptFile);
+  }
+  const child = spawn(process.execPath, args);
+
+  const handler = tearDown.bind(null, child);
+  process.on('exit', handler);
+  process.on('uncaughtException', handler);
+  process.on('unhandledRejection', handler);
+  process.on('SIGINT', handler);
+
+  return child;
+}
+
+function makeBufferingDataCallback(dataCallback) {
+  let buffer = Buffer.alloc(0);
+  return (data) => {
+    const newData = Buffer.concat([buffer, data]);
+    const str = newData.toString('utf8');
+    const lines = str.replace(/\r/g, '').split('\n');
+    if (str.endsWith('\n'))
+      buffer = Buffer.alloc(0);
+    else
+      buffer = Buffer.from(lines.pop(), 'utf8');
+    for (const line of lines)
+      dataCallback(line);
+  };
+}
+
+function tearDown(child, err) {
+  child.kill();
+  if (err) {
+    console.error(err);
+    process.exit(1);
+  }
+}
+
+function parseWSFrame(buffer) {
+  // Protocol described in https://tools.ietf.org/html/rfc6455#section-5
+  let message = null;
+  if (buffer.length < 2)
+    return { length: 0, message };
+  if (buffer[0] === 0x88 && buffer[1] === 0x00) {
+    return { length: 2, message, closed: true };
+  }
+  assert.strictEqual(buffer[0], 0x81);
+  let dataLen = 0x7F & buffer[1];
+  let bodyOffset = 2;
+  if (buffer.length < bodyOffset + dataLen)
+    return 0;
+  if (dataLen === 126) {
+    dataLen = buffer.readUInt16BE(2);
+    bodyOffset = 4;
+  } else if (dataLen === 127) {
+    assert(buffer[2] === 0 && buffer[3] === 0, 'Inspector message too big');
+    dataLen = buffer.readUIntBE(4, 6);
+    bodyOffset = 10;
+  }
+  if (buffer.length < bodyOffset + dataLen)
+    return { length: 0, message };
+  const jsonPayload =
+    buffer.slice(bodyOffset, bodyOffset + dataLen).toString('utf8');
+  try {
+    message = JSON.parse(jsonPayload);
+  } catch (e) {
+    console.error(`JSON.parse() failed for: ${jsonPayload}`);
+    throw e;
+  }
+  if (DEBUG)
+    console.log('[received]', JSON.stringify(message));
+  return { length: bodyOffset + dataLen, message };
+}
+
+function formatWSFrame(message) {
+  const messageBuf = Buffer.from(JSON.stringify(message));
+
+  const wsHeaderBuf = Buffer.allocUnsafe(16);
+  wsHeaderBuf.writeUInt8(0x81, 0);
+  let byte2 = 0x80;
+  const bodyLen = messageBuf.length;
+
+  let maskOffset = 2;
+  if (bodyLen < 126) {
+    byte2 = 0x80 + bodyLen;
+  } else if (bodyLen < 65536) {
+    byte2 = 0xFE;
+    wsHeaderBuf.writeUInt16BE(bodyLen, 2);
+    maskOffset = 4;
+  } else {
+    byte2 = 0xFF;
+    wsHeaderBuf.writeUInt32BE(bodyLen, 2);
+    wsHeaderBuf.writeUInt32BE(0, 6);
+    maskOffset = 10;
+  }
+  wsHeaderBuf.writeUInt8(byte2, 1);
+  wsHeaderBuf.writeUInt32BE(0x01020408, maskOffset);
+
+  for (let i = 0; i < messageBuf.length; i++)
+    messageBuf[i] = messageBuf[i] ^ (1 << (i % 4));
+
+  return Buffer.concat([wsHeaderBuf.slice(0, maskOffset + 4), messageBuf]);
+}
+
+class InspectorSession {
+  constructor(socket, instance) {
+    this._instance = instance;
+    this._socket = socket;
+    this._nextId = 1;
+    this._commandResponsePromises = new Map();
+    this._unprocessedNotifications = [];
+    this._notificationCallback = null;
+    this._scriptsIdsByUrl = new Map();
+    this._pausedDetails = null;
+
+    let buffer = Buffer.alloc(0);
+    socket.on('data', (data) => {
+      buffer = Buffer.concat([buffer, data]);
+      do {
+        const { length, message, closed } = parseWSFrame(buffer);
+        if (!length)
+          break;
+
+        if (closed) {
+          socket.write(Buffer.from([0x88, 0x00]));  // WS close frame
+        }
+        buffer = buffer.slice(length);
+        if (message)
+          this._onMessage(message);
+      } while (true);
+    });
+    this._terminationPromise = new Promise((resolve) => {
+      socket.once('close', resolve);
+    });
+  }
+
+
+  waitForServerDisconnect() {
+    return this._terminationPromise;
+  }
+
+  async disconnect() {
+    this._socket.destroy();
+    return this.waitForServerDisconnect();
+  }
+
+  _onMessage(message) {
+    if (message.id) {
+      const { resolve, reject } = this._commandResponsePromises.get(message.id);
+      this._commandResponsePromises.delete(message.id);
+      if (message.result)
+        resolve(message.result);
+      else
+        reject(message.error);
+    } else {
+      if (message.method === 'Debugger.scriptParsed') {
+        const { scriptId, url } = message.params;
+        this._scriptsIdsByUrl.set(scriptId, url);
+        const fileUrl = url.startsWith('file:') ?
+          url : pathToFileURL(url).toString();
+        if (fileUrl === this.scriptURL().toString()) {
+          this.mainScriptId = scriptId;
+        }
+      }
+      if (message.method === 'Debugger.paused')
+        this._pausedDetails = message.params;
+      if (message.method === 'Debugger.resumed')
+        this._pausedDetails = null;
+
+      if (this._notificationCallback) {
+        // In case callback needs to install another
+        const callback = this._notificationCallback;
+        this._notificationCallback = null;
+        callback(message);
+      } else {
+        this._unprocessedNotifications.push(message);
+      }
+    }
+  }
+
+  unprocessedNotifications() {
+    return this._unprocessedNotifications;
+  }
+
+  _sendMessage(message) {
+    const msg = JSON.parse(JSON.stringify(message)); // Clone!
+    msg.id = this._nextId++;
+    if (DEBUG)
+      console.log('[sent]', JSON.stringify(msg));
+
+    const responsePromise = new Promise((resolve, reject) => {
+      this._commandResponsePromises.set(msg.id, { resolve, reject });
+    });
+
+    return new Promise(
+      (resolve) => this._socket.write(formatWSFrame(msg), resolve))
+      .then(() => responsePromise);
+  }
+
+  send(commands) {
+    if (Array.isArray(commands)) {
+      // Multiple commands means the response does not matter. There might even
+      // never be a response.
+      return Promise
+        .all(commands.map((command) => this._sendMessage(command)))
+        .then(() => {});
+    }
+    return this._sendMessage(commands);
+  }
+
+  waitForNotification(methodOrPredicate, description) {
+    const desc = description || methodOrPredicate;
+    const message = `Timed out waiting for matching notification (${desc})`;
+    return fires(
+      this._asyncWaitForNotification(methodOrPredicate), message, TIMEOUT);
+  }
+
+  async _asyncWaitForNotification(methodOrPredicate) {
+    function matchMethod(notification) {
+      return notification.method === methodOrPredicate;
+    }
+    const predicate =
+        typeof methodOrPredicate === 'string' ? matchMethod : methodOrPredicate;
+    let notification = null;
+    do {
+      if (this._unprocessedNotifications.length) {
+        notification = this._unprocessedNotifications.shift();
+      } else {
+        notification = await new Promise(
+          (resolve) => this._notificationCallback = resolve);
+      }
+    } while (!predicate(notification));
+    return notification;
+  }
+
+  _isBreakOnLineNotification(message, line, expectedScriptPath) {
+    if (message.method === 'Debugger.paused') {
+      const callFrame = message.params.callFrames[0];
+      const location = callFrame.location;
+      const scriptPath = this._scriptsIdsByUrl.get(location.scriptId);
+      assert.strictEqual(decodeURIComponent(scriptPath),
+                         decodeURIComponent(expectedScriptPath),
+                         `${scriptPath} !== ${expectedScriptPath}`);
+      assert.strictEqual(location.lineNumber, line);
+      return true;
+    }
+  }
+
+  waitForBreakOnLine(line, url) {
+    return this
+      .waitForNotification(
+        (notification) =>
+          this._isBreakOnLineNotification(notification, line, url),
+        `break on ${url}:${line}`);
+  }
+
+  waitForPauseOnStart() {
+    return this
+      .waitForNotification(
+        (notification) =>
+          notification.method === 'Debugger.paused' && notification.params.reason === 'Break on start',
+        'break on start');
+  }
+
+  pausedDetails() {
+    return this._pausedDetails;
+  }
+
+  _matchesConsoleOutputNotification(notification, type, values) {
+    if (!Array.isArray(values))
+      values = [ values ];
+    if (notification.method === 'Runtime.consoleAPICalled') {
+      const params = notification.params;
+      if (params.type === type) {
+        let i = 0;
+        for (const value of params.args) {
+          if (value.value !== values[i++])
+            return false;
+        }
+        return i === values.length;
+      }
+    }
+  }
+
+  waitForConsoleOutput(type, values) {
+    const desc = `Console output matching ${JSON.stringify(values)}`;
+    return this.waitForNotification(
+      (notification) => this._matchesConsoleOutputNotification(notification,
+                                                               type, values),
+      desc);
+  }
+
+  async runToCompletion() {
+    console.log('[test]', 'Verify node waits for the frontend to disconnect');
+    await this.send({ 'method': 'Debugger.resume' });
+    await this.waitForNotification((notification) => {
+      if (notification.method === 'Debugger.paused') {
+        this.send({ 'method': 'Debugger.resume' });
+      }
+      return notification.method === 'Runtime.executionContextDestroyed' &&
+        notification.params.executionContextId === 1;
+    });
+    await this.waitForDisconnect();
+  }
+
+  async waitForDisconnect() {
+    while ((await this._instance.nextStderrString()) !==
+              'Waiting for the debugger to disconnect...');
+    await this.disconnect();
+  }
+
+  scriptPath() {
+    return this._instance.scriptPath();
+  }
+
+  script() {
+    return this._instance.script();
+  }
+
+  scriptURL() {
+    return pathToFileURL(this.scriptPath());
+  }
+}
+
+class NodeInstance extends EventEmitter {
+  constructor(inspectorFlags = ['--inspect-brk=0', '--expose-internals'],
+              scriptContents = '',
+              scriptFile = _MAINSCRIPT,
+              logger = console) {
+    super();
+
+    this._logger = logger;
+    this._scriptPath = scriptFile;
+    this._script = scriptFile ? null : scriptContents;
+    this._portCallback = null;
+    this.resetPort();
+    this._process = spawnChildProcess(inspectorFlags, scriptContents,
+                                      scriptFile);
+    this._running = true;
+    this._stderrLineCallback = null;
+    this._unprocessedStderrLines = [];
+
+    this._process.stdout.on('data', makeBufferingDataCallback(
+      (line) => {
+        this.emit('stdout', line);
+        this._logger.log('[out]', line);
+      }));
+
+    this._process.stderr.on('data', makeBufferingDataCallback(
+      (message) => this.onStderrLine(message)));
+
+    this._shutdownPromise = new Promise((resolve) => {
+      this._process.once('exit', (exitCode, signal) => {
+        if (signal) {
+          this._logger.error(`[err] child process crashed, signal ${signal}`);
+        }
+        resolve({ exitCode, signal });
+        this._running = false;
+      });
+    });
+  }
+
+  get pid() {
+    return this._process.pid;
+  }
+
+  resetPort() {
+    this.portPromise = new Promise((resolve) => this._portCallback = resolve);
+  }
+
+  static async startViaSignal(scriptContents) {
+    const instance = new NodeInstance(
+      ['--expose-internals', '--inspect-port=0'],
+      `${scriptContents}\nprocess._rawDebug('started');`, undefined);
+    const msg = 'Timed out waiting for process to start';
+    while (await fires(instance.nextStderrString(), msg, TIMEOUT) !== 'started');
+    process._debugProcess(instance._process.pid);
+    return instance;
+  }
+
+  onStderrLine(line) {
+    this.emit('stderr', line);
+    this._logger.log('[err]', line);
+    if (this._portCallback) {
+      const matches = line.match(/Debugger listening on ws:\/\/.+:(\d+)\/.+/);
+      if (matches) {
+        this._portCallback(matches[1]);
+        this._portCallback = null;
+      }
+    }
+    if (this._stderrLineCallback) {
+      this._stderrLineCallback(line);
+      this._stderrLineCallback = null;
+    } else {
+      this._unprocessedStderrLines.push(line);
+    }
+  }
+
+  httpGet(host, path, hostHeaderValue) {
+    this._logger.log('[test]', `Testing ${path}`);
+    const headers = hostHeaderValue ? { 'Host': hostHeaderValue } : null;
+    return this.portPromise.then((port) => new Promise((resolve, reject) => {
+      const req = http.get({ host, port, family: 4, path, headers }, (res) => {
+        let response = '';
+        res.setEncoding('utf8');
+        res
+          .on('data', (data) => response += data.toString())
+          .on('end', () => {
+            resolve(response);
+          });
+      });
+      req.on('error', reject);
+    })).then((response) => {
+      try {
+        return JSON.parse(response);
+      } catch (e) {
+        e.body = response;
+        throw e;
+      }
+    });
+  }
+
+  async sendUpgradeRequest() {
+    const response = await this.httpGet(null, '/json/list');
+    const devtoolsUrl = response[0].webSocketDebuggerUrl;
+    const port = await this.portPromise;
+    return http.get({
+      port,
+      family: 4,
+      path: new URL(devtoolsUrl).pathname,
+      headers: {
+        'Connection': 'Upgrade',
+        'Upgrade': 'websocket',
+        'Sec-WebSocket-Version': 13,
+        'Sec-WebSocket-Key': 'key==',
+      },
+    });
+  }
+
+  async connectInspectorSession() {
+    this._logger.log('[test]', 'Connecting to a child Node process');
+    const upgradeRequest = await this.sendUpgradeRequest();
+    return new Promise((resolve) => {
+      upgradeRequest
+        .on('upgrade',
+            (message, socket) => resolve(new InspectorSession(socket, this)))
+        .on('response', common.mustNotCall('Upgrade was not received'));
+    });
+  }
+
+  async expectConnectionDeclined() {
+    this._logger.log('[test]', 'Checking upgrade is not possible');
+    const upgradeRequest = await this.sendUpgradeRequest();
+    return new Promise((resolve) => {
+      upgradeRequest
+          .on('upgrade', common.mustNotCall('Upgrade was received'))
+          .on('response', (response) =>
+            response.on('data', () => {})
+                    .on('end', () => resolve(response.statusCode)));
+    });
+  }
+
+  expectShutdown() {
+    return this._shutdownPromise;
+  }
+
+  nextStderrString() {
+    if (this._unprocessedStderrLines.length)
+      return Promise.resolve(this._unprocessedStderrLines.shift());
+    return new Promise((resolve) => this._stderrLineCallback = resolve);
+  }
+
+  write(message) {
+    this._process.stdin.write(message);
+  }
+
+  kill() {
+    this._process.kill();
+    return this.expectShutdown();
+  }
+
+  scriptPath() {
+    return this._scriptPath;
+  }
+
+  script() {
+    if (this._script === null)
+      this._script = fs.readFileSync(this.scriptPath(), 'utf8');
+    return this._script;
+  }
+}
+
+function onResolvedOrRejected(promise, callback) {
+  return promise.then((result) => {
+    callback();
+    return result;
+  }, (error) => {
+    callback();
+    throw error;
+  });
+}
+
+function timeoutPromise(error, timeoutMs) {
+  let clearCallback = null;
+  let done = false;
+  const promise = onResolvedOrRejected(new Promise((resolve, reject) => {
+    const timeout = setTimeout(() => reject(error), timeoutMs);
+    clearCallback = () => {
+      if (done)
+        return;
+      clearTimeout(timeout);
+      resolve();
+    };
+  }), () => done = true);
+  promise.clear = clearCallback;
+  return promise;
+}
+
+// Returns a new promise that will propagate `promise` resolution or rejection
+// if that happens within the `timeoutMs` timespan, or rejects with `error` as
+// a reason otherwise.
+function fires(promise, error, timeoutMs) {
+  const timeout = timeoutPromise(error, timeoutMs);
+  return Promise.race([
+    onResolvedOrRejected(promise, () => timeout.clear()),
+    timeout,
+  ]);
+}
+
+/**
+ * When waiting for inspector events, there might be no handles on the event
+ * loop, and leads to process exits.
+ *
+ * This function provides a utility to wait until a inspector event for a certain
+ * time.
+ */
+function waitUntil(session, eventName, timeout = 1000) {
+  const resolvers = Promise.withResolvers();
+  const timer = setTimeout(() => {
+    resolvers.reject(new Error(`Wait for inspector event ${eventName} timed out`));
+  }, timeout);
+
+  once(session, eventName)
+    .then((res) => {
+      resolvers.resolve(res);
+      clearTimeout(timer);
+    }, (error) => {
+      // This should never happen.
+      resolvers.reject(error);
+      clearTimeout(timer);
+    });
+
+  return resolvers.promise;
+}
+
+module.exports = {
+  NodeInstance,
+  waitUntil,
+};

test/common/internet.js

@@ -0,0 +1,60 @@
+'use strict';
+
+// Utilities for internet-related tests
+
+const addresses = {
+  // A generic host that has registered common DNS records,
+  // supports both IPv4 and IPv6, and provides basic HTTP/HTTPS services
+  INET_HOST: 'nodejs.org',
+  // A host that provides IPv4 services
+  INET4_HOST: 'nodejs.org',
+  // A host that provides IPv6 services
+  INET6_HOST: 'nodejs.org',
+  // An accessible IPv4 IP,
+  // defaults to the Google Public DNS IPv4 address
+  INET4_IP: '8.8.8.8',
+  // An accessible IPv6 IP,
+  // defaults to the Google Public DNS IPv6 address
+  INET6_IP: '2001:4860:4860::8888',
+  // An invalid host that cannot be resolved
+  // See https://tools.ietf.org/html/rfc2606#section-2
+  INVALID_HOST: 'something.invalid',
+  // A host with MX records registered
+  MX_HOST: 'nodejs.org',
+  // On some systems, .invalid returns a server failure/try again rather than
+  // record not found. Use this to guarantee record not found.
+  NOT_FOUND: 'come.on.fhqwhgads.test',
+  // A host with SRV records registered
+  SRV_HOST: '_caldav._tcp.google.com',
+  // A host with PTR records registered
+  PTR_HOST: '8.8.8.8.in-addr.arpa',
+  // A host with NAPTR records registered
+  NAPTR_HOST: 'sip2sip.info',
+  // A host with SOA records registered
+  SOA_HOST: 'nodejs.org',
+  // A host with CAA record registered
+  CAA_HOST: 'google.com',
+  // A host with CNAME records registered
+  CNAME_HOST: 'blog.nodejs.org',
+  // A host with NS records registered
+  NS_HOST: 'nodejs.org',
+  // A host with TLSA records registered
+  TLSA_HOST: '_443._tcp.fedoraproject.org',
+  // A host with TXT records registered
+  TXT_HOST: 'nodejs.org',
+  // An accessible IPv4 DNS server
+  DNS4_SERVER: '8.8.8.8',
+  // An accessible IPv4 DNS server
+  DNS6_SERVER: '2001:4860:4860::8888',
+};
+
+for (const key of Object.keys(addresses)) {
+  const envName = `NODE_TEST_${key}`;
+  if (process.env[envName]) {
+    addresses[key] = process.env[envName];
+  }
+}
+
+module.exports = {
+  addresses,
+};

test/common/measure-memory.js

@@ -0,0 +1,57 @@
+'use strict';
+
+const assert = require('assert');
+const common = require('./');
+
+// The formats could change when V8 is updated, then the tests should be
+// updated accordingly.
+function assertResultShape(result) {
+  assert.strictEqual(typeof result.jsMemoryEstimate, 'number');
+  assert.strictEqual(typeof result.jsMemoryRange[0], 'number');
+  assert.strictEqual(typeof result.jsMemoryRange[1], 'number');
+}
+
+function assertSummaryShape(result) {
+  assert.strictEqual(typeof result, 'object');
+  assert.strictEqual(typeof result.total, 'object');
+  assertResultShape(result.total);
+}
+
+function assertDetailedShape(result, contexts = 0) {
+  assert.strictEqual(typeof result, 'object');
+  assert.strictEqual(typeof result.total, 'object');
+  assert.strictEqual(typeof result.current, 'object');
+  assertResultShape(result.total);
+  assertResultShape(result.current);
+  if (contexts === 0) {
+    assert.deepStrictEqual(result.other, []);
+  } else {
+    assert.strictEqual(result.other.length, contexts);
+    for (const item of result.other) {
+      assertResultShape(item);
+    }
+  }
+}
+
+function assertSingleDetailedShape(result) {
+  assert.strictEqual(typeof result, 'object');
+  assert.strictEqual(typeof result.total, 'object');
+  assert.strictEqual(typeof result.current, 'object');
+  assert.deepStrictEqual(result.other, []);
+  assertResultShape(result.total);
+  assertResultShape(result.current);
+}
+
+function expectExperimentalWarning() {
+  common.expectWarning(
+    'ExperimentalWarning',
+    'vm.measureMemory is an experimental feature and might change at any time',
+  );
+}
+
+module.exports = {
+  assertSummaryShape,
+  assertDetailedShape,
+  assertSingleDetailedShape,
+  expectExperimentalWarning,
+};

test/common/net.js

@@ -0,0 +1,33 @@
+'use strict';
+const net = require('net');
+
+const options = { port: 0, reusePort: true };
+
+function checkSupportReusePort() {
+  return new Promise((resolve, reject) => {
+    const server = net.createServer().listen(options);
+    server.on('listening', () => {
+      server.close(resolve);
+    });
+    server.on('error', (err) => {
+      console.log('The `reusePort` option is not supported:', err.message);
+      server.close();
+      reject(err);
+    });
+  });
+}
+
+function hasMultiLocalhost() {
+  const { internalBinding } = require('internal/test/binding');
+  const { TCP, constants: TCPConstants } = internalBinding('tcp_wrap');
+  const t = new TCP(TCPConstants.SOCKET);
+  const ret = t.bind('127.0.0.2', 0);
+  t.close();
+  return ret === 0;
+}
+
+module.exports = {
+  checkSupportReusePort,
+  hasMultiLocalhost,
+  options,
+};

test/common/package.json

@@ -0,0 +1,3 @@
+{
+  "type": "commonjs"
+}

test/common/process-exit-code-cases.js

@@ -0,0 +1,138 @@
+'use strict';
+
+const assert = require('assert');
+
+function getTestCases(isWorker = false) {
+  const cases = [];
+  function exitsOnExitCodeSet() {
+    process.exitCode = 42;
+    process.on('exit', (code) => {
+      assert.strictEqual(process.exitCode, 42);
+      assert.strictEqual(code, 42);
+    });
+  }
+  cases.push({ func: exitsOnExitCodeSet, result: 42 });
+
+  function changesCodeViaExit() {
+    process.exitCode = 99;
+    process.on('exit', (code) => {
+      assert.strictEqual(process.exitCode, 42);
+      assert.strictEqual(code, 42);
+    });
+    process.exit(42);
+  }
+  cases.push({ func: changesCodeViaExit, result: 42 });
+
+  function changesCodeZeroExit() {
+    process.exitCode = 99;
+    process.on('exit', (code) => {
+      assert.strictEqual(process.exitCode, 0);
+      assert.strictEqual(code, 0);
+    });
+    process.exit(0);
+  }
+  cases.push({ func: changesCodeZeroExit, result: 0 });
+
+  function exitWithOneOnUncaught() {
+    process.exitCode = 99;
+    process.on('exit', (code) => {
+      // Cannot use assert because it will be uncaughtException -> 1 exit code
+      // that will render this test useless
+      if (code !== 1 || process.exitCode !== 1) {
+        console.log('wrong code! expected 1 for uncaughtException');
+        process.exit(99);
+      }
+    });
+    throw new Error('ok');
+  }
+  cases.push({
+    func: exitWithOneOnUncaught,
+    result: 1,
+    error: /^Error: ok$/,
+  });
+
+  function changeCodeInsideExit() {
+    process.exitCode = 95;
+    process.on('exit', (code) => {
+      assert.strictEqual(process.exitCode, 95);
+      assert.strictEqual(code, 95);
+      process.exitCode = 99;
+    });
+  }
+  cases.push({ func: changeCodeInsideExit, result: 99 });
+
+  function zeroExitWithUncaughtHandler() {
+    const noop = () => { };
+    process.on('exit', (code) => {
+      process.off('uncaughtException', noop);
+      assert.strictEqual(process.exitCode, undefined);
+      assert.strictEqual(code, 0);
+    });
+    process.on('uncaughtException', noop);
+    throw new Error('ok');
+  }
+  cases.push({ func: zeroExitWithUncaughtHandler, result: 0 });
+
+  function changeCodeInUncaughtHandler() {
+    const modifyExitCode = () => { process.exitCode = 97; };
+    process.on('exit', (code) => {
+      process.off('uncaughtException', modifyExitCode);
+      assert.strictEqual(process.exitCode, 97);
+      assert.strictEqual(code, 97);
+    });
+    process.on('uncaughtException', modifyExitCode);
+    throw new Error('ok');
+  }
+  cases.push({ func: changeCodeInUncaughtHandler, result: 97 });
+
+  function changeCodeInExitWithUncaught() {
+    process.on('exit', (code) => {
+      assert.strictEqual(process.exitCode, 1);
+      assert.strictEqual(code, 1);
+      process.exitCode = 98;
+    });
+    throw new Error('ok');
+  }
+  cases.push({
+    func: changeCodeInExitWithUncaught,
+    result: 98,
+    error: /^Error: ok$/,
+  });
+
+  function exitWithZeroInExitWithUncaught() {
+    process.on('exit', (code) => {
+      assert.strictEqual(process.exitCode, 1);
+      assert.strictEqual(code, 1);
+      process.exitCode = 0;
+    });
+    throw new Error('ok');
+  }
+  cases.push({
+    func: exitWithZeroInExitWithUncaught,
+    result: 0,
+    error: /^Error: ok$/,
+  });
+
+  function exitWithThrowInUncaughtHandler() {
+    process.on('uncaughtException', () => {
+      throw new Error('ok');
+    });
+    throw new Error('bad');
+  }
+  cases.push({
+    func: exitWithThrowInUncaughtHandler,
+    result: isWorker ? 1 : 7,
+    error: /^Error: ok$/,
+  });
+
+  function exitWithUndefinedFatalException() {
+    process._fatalException = undefined;
+    throw new Error('ok');
+  }
+  cases.push({
+    func: exitWithUndefinedFatalException,
+    result: 6,
+  });
+  return cases;
+}
+exports.getTestCases = getTestCases;

test/common/prof.js

@@ -0,0 +1,67 @@
+'use strict';
+
+const assert = require('assert');
+const fs = require('fs');
+const path = require('path');
+
+function getHeapProfiles(dir) {
+  const list = fs.readdirSync(dir);
+  return list
+    .filter((file) => file.endsWith('.heapprofile'))
+    .map((file) => path.join(dir, file));
+}
+
+function findFirstFrameInNode(root, func) {
+  const first = root.children.find(
+    (child) => child.callFrame.functionName === func,
+  );
+  if (first) {
+    return first;
+  }
+  for (const child of root.children) {
+    const first = findFirstFrameInNode(child, func);
+    if (first) {
+      return first;
+    }
+  }
+  return undefined;
+}
+
+function findFirstFrame(file, func) {
+  const data = fs.readFileSync(file, 'utf8');
+  const profile = JSON.parse(data);
+  const first = findFirstFrameInNode(profile.head, func);
+  return { frame: first, roots: profile.head.children };
+}
+
+function verifyFrames(output, file, func) {
+  const { frame, roots } = findFirstFrame(file, func);
+  if (!frame) {
+    // Show native debug output and the profile for debugging.
+    console.log(output.stderr.toString());
+    console.log(roots);
+  }
+  assert.notStrictEqual(frame, undefined);
+}
+
+// We need to set --heap-prof-interval to a small enough value to make
+// sure we can find our workload in the samples, so we need to set
+// TEST_ALLOCATION > kHeapProfInterval.
+const kHeapProfInterval = 128;
+const TEST_ALLOCATION = kHeapProfInterval * 2;
+
+const env = {
+  ...process.env,
+  TEST_ALLOCATION,
+  NODE_DEBUG_NATIVE: 'INSPECTOR_PROFILER',
+};
+
+// TODO(joyeecheung): share the fixutres with v8 coverage tests
+module.exports = {
+  getHeapProfiles,
+  verifyFrames,
+  findFirstFrame,
+  kHeapProfInterval,
+  TEST_ALLOCATION,
+  env,
+};

test/common/proxy-server.js

@@ -0,0 +1,100 @@
+'use strict';
+
+const net = require('net');
+const http = require('http');
+const assert = require('assert');
+
+function logRequest(logs, req) {
+  logs.push({
+    method: req.method,
+    url: req.url,
+    headers: { ...req.headers },
+  });
+}
+
+// This creates a minimal proxy server that logs the requests it gets
+// to an array before performing proxying.
+exports.createProxyServer = function() {
+  const logs = [];
+
+  const proxy = http.createServer();
+  proxy.on('request', (req, res) => {
+    logRequest(logs, req);
+    const [hostname, port] = req.headers.host.split(':');
+    const targetPort = port || 80;
+
+    const options = {
+      hostname: hostname,
+      port: targetPort,
+      path: req.url,
+      method: req.method,
+      headers: req.headers,
+    };
+
+    const proxyReq = http.request(options, (proxyRes) => {
+      res.writeHead(proxyRes.statusCode, proxyRes.headers);
+      proxyRes.pipe(res, { end: true });
+    });
+
+    proxyReq.on('error', (err) => {
+      logs.push({ error: err, source: 'proxy request' });
+      res.writeHead(500);
+      res.end('Proxy error: ' + err.message);
+    });
+
+    req.pipe(proxyReq, { end: true });
+  });
+
+  proxy.on('connect', (req, res, head) => {
+    logRequest(logs, req);
+
+    const [hostname, port] = req.url.split(':');
+    const proxyReq = net.connect(port, hostname, () => {
+      res.write(
+        'HTTP/1.1 200 Connection Established\r\n' +
+        'Proxy-agent: Node.js-Proxy\r\n' +
+        '\r\n',
+      );
+      proxyReq.write(head);
+      res.pipe(proxyReq);
+      proxyReq.pipe(res);
+    });
+
+    proxyReq.on('error', (err) => {
+      logs.push({ error: err, source: 'proxy request' });
+      res.write('HTTP/1.1 500 Connection Error\r\n\r\n');
+      res.end('Proxy error: ' + err.message);
+    });
+  });
+
+  proxy.on('error', (err) => {
+    logs.push({ error: err, source: 'proxy server' });
+  });
+
+  return { proxy, logs };
+};
+
+exports.checkProxiedRequest = async function(envExtension, expectation) {
+  const { spawnPromisified } = require('./');
+  const fixtures = require('./fixtures');
+  const { code, signal, stdout, stderr } = await spawnPromisified(
+    process.execPath,
+    [fixtures.path('fetch-and-log.mjs')], {
+      env: {
+        ...process.env,
+        ...envExtension,
+      },
+    });
+
+  assert.deepStrictEqual({
+    stderr: stderr.trim(),
+    stdout: stdout.trim(),
+    code,
+    signal,
+  }, {
+    stderr: '',
+    code: 0,
+    signal: null,
+    ...expectation,
+  });
+};

test/common/report.js

@@ -0,0 +1,346 @@
+'use strict';
+const assert = require('assert');
+const fs = require('fs');
+const net = require('net');
+const os = require('os');
+const path = require('path');
+const util = require('util');
+const cpus = os.cpus();
+
+function findReports(pid, dir) {
+  // Default filenames are of the form
+  // report.<date>.<time>.<pid>.<tid>.<seq>.json
+  const format = '^report\\.\\d+\\.\\d+\\.' + pid + '\\.\\d+\\.\\d+\\.json$';
+  const filePattern = new RegExp(format);
+  const files = fs.readdirSync(dir);
+  const results = [];
+
+  files.forEach((file) => {
+    if (filePattern.test(file))
+      results.push(path.join(dir, file));
+  });
+
+  return results;
+}
+
+function validate(filepath, fields) {
+  const report = fs.readFileSync(filepath, 'utf8');
+  if (process.report.compact) {
+    const end = report.indexOf('\n');
+    assert.strictEqual(end, report.length - 1);
+  }
+  validateContent(JSON.parse(report), fields);
+}
+
+function validateContent(report, fields = []) {
+  if (typeof report === 'string') {
+    try {
+      report = JSON.parse(report);
+    } catch {
+      throw new TypeError(
+        'validateContent() expects a JSON string or JavaScript Object');
+    }
+  }
+  try {
+    _validateContent(report, fields);
+  } catch (err) {
+    try {
+      err.stack += util.format('\n------\nFailing Report:\n%O', report);
+    } catch {
+      // Continue regardless of error.
+    }
+    throw err;
+  }
+}
+
+function _validateContent(report, fields = []) {
+  const isWindows = process.platform === 'win32';
+  const isJavaScriptThreadReport = report.javascriptHeap != null;
+
+  // Verify that all sections are present as own properties of the report.
+  const sections = ['header', 'nativeStack', 'javascriptStack', 'libuv',
+                    'sharedObjects', 'resourceUsage', 'workers'];
+
+  if (!process.report.excludeEnv) {
+    sections.push('environmentVariables');
+  }
+
+  if (!isWindows)
+    sections.push('userLimits');
+
+  if (report.uvthreadResourceUsage)
+    sections.push('uvthreadResourceUsage');
+
+  if (isJavaScriptThreadReport)
+    sections.push('javascriptHeap');
+
+  checkForUnknownFields(report, sections);
+  sections.forEach((section) => {
+    assert(Object.hasOwn(report, section));
+    assert(typeof report[section] === 'object' && report[section] !== null);
+  });
+
+  fields.forEach((field) => {
+    function checkLoop(actual, rest, expect) {
+      actual = actual[rest.shift()];
+      if (rest.length === 0 && actual !== undefined) {
+        assert.strictEqual(actual, expect);
+      } else {
+        assert(actual);
+        checkLoop(actual, rest, expect);
+      }
+    }
+    let actual, expect;
+    if (Array.isArray(field)) {
+      [actual, expect] = field;
+    } else {
+      actual = field;
+      expect = undefined;
+    }
+    checkLoop(report, actual.split('.'), expect);
+  });
+
+  // Verify the format of the header section.
+  const header = report.header;
+  const headerFields = ['event', 'trigger', 'filename', 'dumpEventTime',
+                        'dumpEventTimeStamp', 'processId', 'commandLine',
+                        'nodejsVersion', 'wordSize', 'arch', 'platform',
+                        'componentVersions', 'release', 'osName', 'osRelease',
+                        'osVersion', 'osMachine', 'cpus', 'host',
+                        'glibcVersionRuntime', 'glibcVersionCompiler', 'cwd',
+                        'reportVersion', 'networkInterfaces', 'threadId'];
+  checkForUnknownFields(header, headerFields);
+  assert.strictEqual(header.reportVersion, 5);  // Increment as needed.
+  assert.strictEqual(typeof header.event, 'string');
+  assert.strictEqual(typeof header.trigger, 'string');
+  assert(typeof header.filename === 'string' || header.filename === null);
+  assert.notStrictEqual(new Date(header.dumpEventTime).toString(),
+                        'Invalid Date');
+  assert(String(+header.dumpEventTimeStamp), header.dumpEventTimeStamp);
+  assert(Number.isSafeInteger(header.processId));
+  assert(Number.isSafeInteger(header.threadId) || header.threadId === null);
+  assert.strictEqual(typeof header.cwd, 'string');
+  assert(Array.isArray(header.commandLine));
+  header.commandLine.forEach((arg) => {
+    assert.strictEqual(typeof arg, 'string');
+  });
+  assert.strictEqual(header.nodejsVersion, process.version);
+  assert(Number.isSafeInteger(header.wordSize));
+  assert.strictEqual(header.arch, os.arch());
+  assert.strictEqual(header.platform, os.platform());
+  assert.deepStrictEqual(header.componentVersions, process.versions);
+  assert.deepStrictEqual(header.release, process.release);
+  assert.strictEqual(header.osName, os.type());
+  assert.strictEqual(header.osRelease, os.release());
+  assert.strictEqual(typeof header.osVersion, 'string');
+  assert.strictEqual(typeof header.osMachine, 'string');
+  assert(Array.isArray(header.cpus));
+  assert.strictEqual(header.cpus.length, cpus.length);
+  header.cpus.forEach((cpu) => {
+    assert.strictEqual(typeof cpu.model, 'string');
+    assert.strictEqual(typeof cpu.speed, 'number');
+    assert.strictEqual(typeof cpu.user, 'number');
+    assert.strictEqual(typeof cpu.nice, 'number');
+    assert.strictEqual(typeof cpu.sys, 'number');
+    assert.strictEqual(typeof cpu.idle, 'number');
+    assert.strictEqual(typeof cpu.irq, 'number');
+    assert(cpus.some((c) => {
+      return c.model === cpu.model;
+    }));
+  });
+
+  assert(Array.isArray(header.networkInterfaces));
+  header.networkInterfaces.forEach((iface) => {
+    assert.strictEqual(typeof iface.name, 'string');
+    assert.strictEqual(typeof iface.internal, 'boolean');
+    assert.match(iface.mac, /^([0-9A-F][0-9A-F]:){5}[0-9A-F]{2}$/i);
+
+    if (iface.family === 'IPv4') {
+      assert.strictEqual(net.isIPv4(iface.address), true);
+      assert.strictEqual(net.isIPv4(iface.netmask), true);
+      assert.strictEqual(iface.scopeid, undefined);
+    } else if (iface.family === 'IPv6') {
+      assert.strictEqual(net.isIPv6(iface.address), true);
+      assert.strictEqual(net.isIPv6(iface.netmask), true);
+      assert(Number.isInteger(iface.scopeid));
+    } else {
+      assert.strictEqual(iface.family, 'unknown');
+      assert.strictEqual(iface.address, undefined);
+      assert.strictEqual(iface.netmask, undefined);
+      assert.strictEqual(iface.scopeid, undefined);
+    }
+  });
+  assert.strictEqual(header.host, os.hostname());
+
+  // Verify the format of the nativeStack section.
+  assert(Array.isArray(report.nativeStack));
+  report.nativeStack.forEach((frame) => {
+    assert(typeof frame === 'object' && frame !== null);
+    checkForUnknownFields(frame, ['pc', 'symbol']);
+    assert.strictEqual(typeof frame.pc, 'string');
+    assert.match(frame.pc, /^0x[0-9a-f]+$/);
+    assert.strictEqual(typeof frame.symbol, 'string');
+  });
+
+  if (isJavaScriptThreadReport) {
+    // Verify the format of the javascriptStack section.
+    checkForUnknownFields(report.javascriptStack,
+                          ['message', 'stack', 'errorProperties']);
+    assert.strictEqual(typeof report.javascriptStack.errorProperties,
+                       'object');
+    assert.strictEqual(typeof report.javascriptStack.message, 'string');
+    if (report.javascriptStack.stack !== undefined) {
+      assert(Array.isArray(report.javascriptStack.stack));
+      report.javascriptStack.stack.forEach((frame) => {
+        assert.strictEqual(typeof frame, 'string');
+      });
+    }
+
+    // Verify the format of the javascriptHeap section.
+    const heap = report.javascriptHeap;
+    // See `PrintGCStatistics` in node_report.cc
+    const jsHeapFields = [
+      'totalMemory',
+      'executableMemory',
+      'totalCommittedMemory',
+      'availableMemory',
+      'totalGlobalHandlesMemory',
+      'usedGlobalHandlesMemory',
+      'usedMemory',
+      'memoryLimit',
+      'mallocedMemory',
+      'externalMemory',
+      'peakMallocedMemory',
+      'nativeContextCount',
+      'detachedContextCount',
+      'doesZapGarbage',
+      'heapSpaces',
+    ];
+    checkForUnknownFields(heap, jsHeapFields);
+    // Do not check `heapSpaces` here
+    for (let i = 0; i < jsHeapFields.length - 1; i++) {
+      assert(
+        Number.isSafeInteger(heap[jsHeapFields[i]]),
+        `heap.${jsHeapFields[i]} is not a safe integer`,
+      );
+    }
+    assert(typeof heap.heapSpaces === 'object' && heap.heapSpaces !== null);
+    const heapSpaceFields = ['memorySize', 'committedMemory', 'capacity',
+                             'used', 'available'];
+    Object.keys(heap.heapSpaces).forEach((spaceName) => {
+      const space = heap.heapSpaces[spaceName];
+      checkForUnknownFields(space, heapSpaceFields);
+      heapSpaceFields.forEach((field) => {
+        assert(Number.isSafeInteger(space[field]));
+      });
+    });
+  }
+
+  // Verify the format of the resourceUsage section.
+  const usage = { ...report.resourceUsage };
+  // Delete it, otherwise checkForUnknownFields will throw error
+  delete usage.constrained_memory;
+  const resourceUsageFields = ['userCpuSeconds', 'kernelCpuSeconds',
+                               'cpuConsumptionPercent', 'userCpuConsumptionPercent',
+                               'kernelCpuConsumptionPercent',
+                               'maxRss', 'rss', 'free_memory', 'total_memory',
+                               'available_memory', 'pageFaults', 'fsActivity'];
+  checkForUnknownFields(usage, resourceUsageFields);
+  assert.strictEqual(typeof usage.userCpuSeconds, 'number');
+  assert.strictEqual(typeof usage.kernelCpuSeconds, 'number');
+  assert.strictEqual(typeof usage.cpuConsumptionPercent, 'number');
+  assert.strictEqual(typeof usage.userCpuConsumptionPercent, 'number');
+  assert.strictEqual(typeof usage.kernelCpuConsumptionPercent, 'number');
+  assert(typeof usage.rss, 'string');
+  assert(typeof usage.maxRss, 'string');
+  assert(typeof usage.free_memory, 'string');
+  assert(typeof usage.total_memory, 'string');
+  assert(typeof usage.available_memory, 'string');
+  // This field may not exist
+  if (report.resourceUsage.constrained_memory) {
+    assert(typeof report.resourceUsage.constrained_memory, 'string');
+  }
+  assert(typeof usage.pageFaults === 'object' && usage.pageFaults !== null);
+  checkForUnknownFields(usage.pageFaults, ['IORequired', 'IONotRequired']);
+  assert(Number.isSafeInteger(usage.pageFaults.IORequired));
+  assert(Number.isSafeInteger(usage.pageFaults.IONotRequired));
+  assert(typeof usage.fsActivity === 'object' && usage.fsActivity !== null);
+  checkForUnknownFields(usage.fsActivity, ['reads', 'writes']);
+  assert(Number.isSafeInteger(usage.fsActivity.reads));
+  assert(Number.isSafeInteger(usage.fsActivity.writes));
+
+  // Verify the format of the uvthreadResourceUsage section, if present.
+  if (report.uvthreadResourceUsage) {
+    const usage = report.uvthreadResourceUsage;
+    const threadUsageFields = ['userCpuSeconds', 'kernelCpuSeconds',
+                               'cpuConsumptionPercent', 'fsActivity',
+                               'userCpuConsumptionPercent',
+                               'kernelCpuConsumptionPercent'];
+    checkForUnknownFields(usage, threadUsageFields);
+    assert.strictEqual(typeof usage.userCpuSeconds, 'number');
+    assert.strictEqual(typeof usage.kernelCpuSeconds, 'number');
+    assert.strictEqual(typeof usage.cpuConsumptionPercent, 'number');
+    assert.strictEqual(typeof usage.userCpuConsumptionPercent, 'number');
+    assert.strictEqual(typeof usage.kernelCpuConsumptionPercent, 'number');
+    assert(typeof usage.fsActivity === 'object' && usage.fsActivity !== null);
+    checkForUnknownFields(usage.fsActivity, ['reads', 'writes']);
+    assert(Number.isSafeInteger(usage.fsActivity.reads));
+    assert(Number.isSafeInteger(usage.fsActivity.writes));
+  }
+
+  // Verify the format of the libuv section.
+  assert(Array.isArray(report.libuv));
+  report.libuv.forEach((resource) => {
+    assert.strictEqual(typeof resource.type, 'string');
+    assert.strictEqual(typeof resource.address, 'string');
+    assert.match(resource.address, /^0x[0-9a-f]+$/);
+    assert.strictEqual(typeof resource.is_active, 'boolean');
+    assert.strictEqual(typeof resource.is_referenced,
+                       resource.type === 'loop' ? 'undefined' : 'boolean');
+  });
+
+  if (!process.report.excludeEnv) {
+    // Verify the format of the environmentVariables section.
+    for (const [key, value] of Object.entries(report.environmentVariables)) {
+      assert.strictEqual(typeof key, 'string');
+      assert.strictEqual(typeof value, 'string');
+    }
+  }
+
+  // Verify the format of the userLimits section on non-Windows platforms.
+  if (!isWindows) {
+    const userLimitsFields = ['core_file_size_blocks', 'data_seg_size_bytes',
+                              'file_size_blocks', 'max_locked_memory_bytes',
+                              'max_memory_size_bytes', 'open_files',
+                              'stack_size_bytes', 'cpu_time_seconds',
+                              'max_user_processes', 'virtual_memory_bytes'];
+    checkForUnknownFields(report.userLimits, userLimitsFields);
+    for (const [type, limits] of Object.entries(report.userLimits)) {
+      assert.strictEqual(typeof type, 'string');
+      assert(typeof limits === 'object' && limits !== null);
+      checkForUnknownFields(limits, ['soft', 'hard']);
+      assert(typeof limits.soft === 'number' || limits.soft === 'unlimited',
+             `Invalid ${type} soft limit of ${limits.soft}`);
+      assert(typeof limits.hard === 'number' || limits.hard === 'unlimited',
+             `Invalid ${type} hard limit of ${limits.hard}`);
+    }
+  }
+
+  // Verify the format of the sharedObjects section.
+  assert(Array.isArray(report.sharedObjects));
+  report.sharedObjects.forEach((sharedObject) => {
+    assert.strictEqual(typeof sharedObject, 'string');
+  });
+
+  // Verify the format of the workers section.
+  assert(Array.isArray(report.workers));
+  report.workers.forEach((worker) => _validateContent(worker));
+}
+
+function checkForUnknownFields(actual, expected) {
+  Object.keys(actual).forEach((field) => {
+    assert(expected.includes(field), `'${field}' not expected in ${expected}`);
+  });
+}
+
+module.exports = { findReports, validate, validateContent };

test/common/require-as.js

@@ -0,0 +1,27 @@
+'use strict';
+
+if (require.main !== module) {
+  const { spawnSync } = require('child_process');
+
+  function runModuleAs(filename, flags, spawnOptions, role) {
+    return spawnSync(process.execPath,
+                     [...flags, __filename, role, filename], spawnOptions);
+  }
+
+  module.exports = runModuleAs;
+  return;
+}
+
+const { Worker, isMainThread, workerData } = require('worker_threads');
+
+if (isMainThread) {
+  if (process.argv[2] === 'worker') {
+    new Worker(__filename, {
+      workerData: process.argv[3],
+    });
+    return;
+  }
+  require(process.argv[3]);
+} else {
+  require(workerData);
+}

test/common/sea.js

@@ -0,0 +1,144 @@
+'use strict';
+
+const common = require('../common');
+const fixtures = require('../common/fixtures');
+const tmpdir = require('../common/tmpdir');
+const { inspect } = require('util');
+
+const { readFileSync, copyFileSync, statSync } = require('fs');
+const {
+  spawnSyncAndExitWithoutError,
+} = require('../common/child_process');
+
+function skipIfSingleExecutableIsNotSupported() {
+  if (!process.config.variables.single_executable_application)
+    common.skip('Single Executable Application support has been disabled.');
+
+  if (!['darwin', 'win32', 'linux'].includes(process.platform))
+    common.skip(`Unsupported platform ${process.platform}.`);
+
+  if (process.platform === 'linux' && process.config.variables.is_debug === 1)
+    common.skip('Running the resultant binary fails with `Couldn\'t read target executable"`.');
+
+  if (process.config.variables.node_shared)
+    common.skip('Running the resultant binary fails with ' +
+      '`/home/iojs/node-tmp/.tmp.2366/sea: error while loading shared libraries: ' +
+      'libnode.so.112: cannot open shared object file: No such file or directory`.');
+
+  if (process.config.variables.icu_gyp_path === 'tools/icu/icu-system.gyp')
+    common.skip('Running the resultant binary fails with ' +
+      '`/home/iojs/node-tmp/.tmp.2379/sea: error while loading shared libraries: ' +
+      'libicui18n.so.71: cannot open shared object file: No such file or directory`.');
+
+  if (!process.config.variables.node_use_openssl || process.config.variables.node_shared_openssl)
+    common.skip('Running the resultant binary fails with `Node.js is not compiled with OpenSSL crypto support`.');
+
+  if (process.config.variables.want_separate_host_toolset !== 0)
+    common.skip('Running the resultant binary fails with `Segmentation fault (core dumped)`.');
+
+  if (process.platform === 'linux') {
+    const osReleaseText = readFileSync('/etc/os-release', { encoding: 'utf-8' });
+    const isAlpine = /^NAME="Alpine Linux"/m.test(osReleaseText);
+    if (isAlpine) common.skip('Alpine Linux is not supported.');
+
+    if (process.arch === 's390x') {
+      common.skip('On s390x, postject fails with `memory access out of bounds`.');
+    }
+  }
+
+  if (process.config.variables.ubsan) {
+    common.skip('UndefinedBehavior Sanitizer is not supported');
+  }
+
+  try {
+    readFileSync(process.execPath);
+  } catch (e) {
+    if (e.code === 'ERR_FS_FILE_TOO_LARGE') {
+      common.skip('The Node.js binary is too large to be supported by postject');
+    }
+  }
+
+  tmpdir.refresh();
+
+  // The SEA tests involve making a copy of the executable and writing some fixtures
+  // to the tmpdir. To be safe, ensure that the disk space has at least a copy of the
+  // executable and some extra space for blobs and configs is available.
+  const stat = statSync(process.execPath);
+  const expectedSpace = stat.size + 10 * 1024 * 1024;
+  if (!tmpdir.hasEnoughSpace(expectedSpace)) {
+    common.skip(`Available disk space < ${Math.floor(expectedSpace / 1024 / 1024)} MB`);
+  }
+}
+
+function generateSEA(targetExecutable, sourceExecutable, seaBlob, verifyWorkflow = false) {
+  try {
+    copyFileSync(sourceExecutable, targetExecutable);
+  } catch (e) {
+    const message = `Cannot copy ${sourceExecutable} to ${targetExecutable}: ${inspect(e)}`;
+    if (verifyWorkflow) {
+      throw new Error(message);
+    }
+    common.skip(message);
+  }
+  console.log(`Copied ${sourceExecutable} to ${targetExecutable}`);
+
+  const postjectFile = fixtures.path('postject-copy', 'node_modules', 'postject', 'dist', 'cli.js');
+  try {
+    spawnSyncAndExitWithoutError(process.execPath, [
+      postjectFile,
+      targetExecutable,
+      'NODE_SEA_BLOB',
+      seaBlob,
+      '--sentinel-fuse', 'NODE_SEA_FUSE_fce680ab2cc467b6e072b8b5df1996b2',
+      ...process.platform === 'darwin' ? [ '--macho-segment-name', 'NODE_SEA' ] : [],
+    ]);
+  } catch (e) {
+    const message = `Cannot inject ${seaBlob} into ${targetExecutable}: ${inspect(e)}`;
+    if (verifyWorkflow) {
+      throw new Error(message);
+    }
+    common.skip(message);
+  }
+  console.log(`Injected ${seaBlob} into ${targetExecutable}`);
+
+  if (process.platform === 'darwin') {
+    try {
+      spawnSyncAndExitWithoutError('codesign', [ '--sign', '-', targetExecutable ]);
+      spawnSyncAndExitWithoutError('codesign', [ '--verify', targetExecutable ]);
+    } catch (e) {
+      const message = `Cannot sign ${targetExecutable}: ${inspect(e)}`;
+      if (verifyWorkflow) {
+        throw new Error(message);
+      }
+      common.skip(message);
+    }
+    console.log(`Signed ${targetExecutable}`);
+  } else if (process.platform === 'win32') {
+    try {
+      spawnSyncAndExitWithoutError('where', [ 'signtool' ]);
+    } catch (e) {
+      const message = `Cannot find signtool: ${inspect(e)}`;
+      if (verifyWorkflow) {
+        throw new Error(message);
+      }
+      common.skip(message);
+    }
+    let stderr;
+    try {
+      ({ stderr } = spawnSyncAndExitWithoutError('signtool', [ 'sign', '/fd', 'SHA256', targetExecutable ]));
+      spawnSyncAndExitWithoutError('signtool', ['verify', '/pa', 'SHA256', targetExecutable]);
+    } catch (e) {
+      const message = `Cannot sign ${targetExecutable}: ${inspect(e)}\n${stderr}`;
+      if (verifyWorkflow) {
+        throw new Error(message);
+      }
+      common.skip(message);
+    }
+    console.log(`Signed ${targetExecutable}`);
+  }
+}
+
+module.exports = {
+  skipIfSingleExecutableIsNotSupported,
+  generateSEA,
+};

test/common/shared-lib-util.js

@@ -0,0 +1,50 @@
+'use strict';
+const common = require('../common');
+const path = require('path');
+
+const kNodeShared = Boolean(process.config.variables.node_shared);
+const kShlibSuffix = process.config.variables.shlib_suffix;
+const kExecPath = path.dirname(process.execPath);
+
+// If node executable is linked to shared lib, need to take care about the
+// shared lib path.
+function addLibraryPath(env) {
+  if (!kNodeShared) {
+    return;
+  }
+
+  env ||= process.env;
+
+  env.LD_LIBRARY_PATH =
+    (env.LD_LIBRARY_PATH ? env.LD_LIBRARY_PATH + path.delimiter : '') +
+    kExecPath;
+  // For AIX.
+  env.LIBPATH =
+    (env.LIBPATH ? env.LIBPATH + path.delimiter : '') +
+    kExecPath;
+  // For macOS.
+  env.DYLD_LIBRARY_PATH =
+    (env.DYLD_LIBRARY_PATH ? env.DYLD_LIBRARY_PATH + path.delimiter : '') +
+    kExecPath;
+  // For Windows.
+  env.PATH = (env.PATH ? env.PATH + path.delimiter : '') + kExecPath;
+}
+
+// Get the full path of shared lib.
+function getSharedLibPath() {
+  if (common.isWindows) {
+    return path.join(kExecPath, 'node.dll');
+  }
+  return path.join(kExecPath, `libnode.${kShlibSuffix}`);
+}
+
+// Get the binary path of stack frames.
+function getBinaryPath() {
+  return kNodeShared ? getSharedLibPath() : process.execPath;
+}
+
+module.exports = {
+  addLibraryPath,
+  getBinaryPath,
+  getSharedLibPath,
+};

test/common/snapshot.js

@@ -0,0 +1,65 @@
+'use strict';
+
+const tmpdir = require('../common/tmpdir');
+const { spawnSync } = require('child_process');
+const fs = require('fs');
+const assert = require('assert');
+
+function buildSnapshot(entry, env) {
+  const child = spawnSync(process.execPath, [
+    '--snapshot-blob',
+    tmpdir.resolve('snapshot.blob'),
+    '--build-snapshot',
+    entry,
+  ], {
+    cwd: tmpdir.path,
+    env: {
+      ...process.env,
+      ...env,
+    },
+  });
+
+  const stderr = child.stderr.toString();
+  const stdout = child.stdout.toString();
+  console.log('[stderr]');
+  console.log(stderr);
+  console.log('[stdout]');
+  console.log(stdout);
+
+  assert.strictEqual(child.status, 0);
+
+  const stats = fs.statSync(tmpdir.resolve('snapshot.blob'));
+  assert(stats.isFile());
+
+  return { child, stderr, stdout };
+}
+
+function runWithSnapshot(entry, env) {
+  const args = ['--snapshot-blob', tmpdir.resolve('snapshot.blob')];
+  if (entry !== undefined) {
+    args.push(entry);
+  }
+  const child = spawnSync(process.execPath, args, {
+    cwd: tmpdir.path,
+    env: {
+      ...process.env,
+      ...env,
+    },
+  });
+
+  const stderr = child.stderr.toString();
+  const stdout = child.stdout.toString();
+  console.log('[stderr]');
+  console.log(stderr);
+  console.log('[stdout]');
+  console.log(stdout);
+
+  assert.strictEqual(child.status, 0);
+
+  return { child, stderr, stdout };
+}
+
+module.exports = {
+  buildSnapshot,
+  runWithSnapshot,
+};

test/common/test-error-reporter.js

@@ -0,0 +1,41 @@
+'use strict';
+const { relative } = require('node:path');
+const { inspect } = require('node:util');
+const cwd = process.cwd();
+
+module.exports = async function* errorReporter(source) {
+  for await (const event of source) {
+    if (event.type === 'test:fail') {
+      const { name, details, line, column, file } = event.data;
+      let { error } = details;
+
+      if (error?.failureType === 'subtestsFailed') {
+        // In the interest of keeping things concise, skip failures that are
+        // only due to nested failures.
+        continue;
+      }
+
+      if (error?.code === 'ERR_TEST_FAILURE') {
+        error = error.cause;
+      }
+
+      const output = [
+        `Test failure: '${name}'`,
+      ];
+
+      if (file) {
+        output.push(`Location: ${relative(cwd, file)}:${line}:${column}`);
+      }
+
+      output.push(inspect(error));
+      output.push('\n');
+      yield output.join('\n');
+
+      if (process.env.FAIL_FAST) {
+        yield `\nBailing on failed test: ${event.data.name}\n`;
+        process.exitCode = 1;
+        process.emit('SIGINT');
+      }
+    }
+  }
+};

test/common/tick.js

@@ -0,0 +1,12 @@
+'use strict';
+
+module.exports = function tick(x, cb) {
+  function ontick() {
+    if (--x === 0) {
+      if (typeof cb === 'function') cb();
+    } else {
+      setImmediate(ontick);
+    }
+  }
+  setImmediate(ontick);
+};

test/common/tls.js

@@ -0,0 +1,189 @@
+/* eslint-disable node-core/crypto-check */
+
+'use strict';
+const crypto = require('crypto');
+const net = require('net');
+const assert = require('assert');
+
+exports.ccs = Buffer.from('140303000101', 'hex');
+
+class TestTLSSocket extends net.Socket {
+  constructor(server_cert) {
+    super();
+    this.server_cert = server_cert;
+    this.version = Buffer.from('0303', 'hex');
+    this.handshake_list = [];
+    // AES128-GCM-SHA256
+    this.ciphers = Buffer.from('000002009c0', 'hex');
+    this.pre_primary_secret =
+      Buffer.concat([this.version, crypto.randomBytes(46)]);
+    this.primary_secret = null;
+    this.write_seq = 0;
+    this.client_random = crypto.randomBytes(32);
+
+    this.on('handshake', (msg) => {
+      this.handshake_list.push(msg);
+    });
+
+    this.on('server_random', (server_random) => {
+      this.primary_secret = PRF12('sha256', this.pre_primary_secret,
+                                  'primary secret',
+                                  Buffer.concat([this.client_random,
+                                                 server_random]),
+                                  48);
+      const key_block = PRF12('sha256', this.primary_secret,
+                              'key expansion',
+                              Buffer.concat([server_random,
+                                             this.client_random]),
+                              40);
+      this.client_writeKey = key_block.slice(0, 16);
+      this.client_writeIV = key_block.slice(32, 36);
+    });
+  }
+
+  createClientHello() {
+    const compressions = Buffer.from('0100', 'hex'); // null
+    const msg = addHandshakeHeader(0x01, Buffer.concat([
+      this.version, this.client_random, this.ciphers, compressions,
+    ]));
+    this.emit('handshake', msg);
+    return addRecordHeader(0x16, msg);
+  }
+
+  createClientKeyExchange() {
+    const encrypted_pre_primary_secret = crypto.publicEncrypt({
+      key: this.server_cert,
+      padding: crypto.constants.RSA_PKCS1_PADDING,
+    }, this.pre_primary_secret);
+    const length = Buffer.alloc(2);
+    length.writeUIntBE(encrypted_pre_primary_secret.length, 0, 2);
+    const msg = addHandshakeHeader(0x10, Buffer.concat([
+      length, encrypted_pre_primary_secret]));
+    this.emit('handshake', msg);
+    return addRecordHeader(0x16, msg);
+  }
+
+  createFinished() {
+    const shasum = crypto.createHash('sha256');
+    shasum.update(Buffer.concat(this.handshake_list));
+    const message_hash = shasum.digest();
+    const r = PRF12('sha256', this.primary_secret,
+                    'client finished', message_hash, 12);
+    const msg = addHandshakeHeader(0x14, r);
+    this.emit('handshake', msg);
+    return addRecordHeader(0x16, msg);
+  }
+
+  createIllegalHandshake() {
+    const illegal_handshake = Buffer.alloc(5);
+    return addRecordHeader(0x16, illegal_handshake);
+  }
+
+  parseTLSFrame(buf) {
+    let offset = 0;
+    const record = buf.slice(offset, 5);
+    const type = record[0];
+    const length = record.slice(3, 5).readUInt16BE(0);
+    offset += 5;
+    let remaining = buf.slice(offset, offset + length);
+    if (type === 0x16) {
+      do {
+        remaining = this.parseTLSHandshake(remaining);
+      } while (remaining.length > 0);
+    }
+    offset += length;
+    return buf.slice(offset);
+  }
+
+  parseTLSHandshake(buf) {
+    let offset = 0;
+    const handshake_type = buf[offset];
+    if (handshake_type === 0x02) {
+      const server_random = buf.slice(6, 6 + 32);
+      this.emit('server_random', server_random);
+    }
+    offset += 1;
+    const length = buf.readUIntBE(offset, 3);
+    offset += 3;
+    const handshake = buf.slice(0, offset + length);
+    this.emit('handshake', handshake);
+    offset += length;
+    const remaining = buf.slice(offset);
+    return remaining;
+  }
+
+  encrypt(plain) {
+    const type = plain.slice(0, 1);
+    const version = plain.slice(1, 3);
+    const nonce = crypto.randomBytes(8);
+    const iv = Buffer.concat([this.client_writeIV.slice(0, 4), nonce]);
+    const bob = crypto.createCipheriv('aes-128-gcm', this.client_writeKey, iv);
+    const write_seq = Buffer.alloc(8);
+    write_seq.writeUInt32BE(this.write_seq++, 4);
+    const aad = Buffer.concat([write_seq, plain.slice(0, 5)]);
+    bob.setAAD(aad);
+    const encrypted1 = bob.update(plain.slice(5));
+    const encrypted = Buffer.concat([encrypted1, bob.final()]);
+    const tag = bob.getAuthTag();
+    const length = Buffer.alloc(2);
+    length.writeUInt16BE(nonce.length + encrypted.length + tag.length, 0);
+    return Buffer.concat([type, version, length, nonce, encrypted, tag]);
+  }
+}
+
+function addRecordHeader(type, frame) {
+  const record_layer = Buffer.from('0003030000', 'hex');
+  record_layer[0] = type;
+  record_layer.writeUInt16BE(frame.length, 3);
+  return Buffer.concat([record_layer, frame]);
+}
+
+function addHandshakeHeader(type, msg) {
+  const handshake_header = Buffer.alloc(4);
+  handshake_header[0] = type;
+  handshake_header.writeUIntBE(msg.length, 1, 3);
+  return Buffer.concat([handshake_header, msg]);
+}
+
+function PRF12(algo, secret, label, seed, size) {
+  const newSeed = Buffer.concat([Buffer.from(label, 'utf8'), seed]);
+  return P_hash(algo, secret, newSeed, size);
+}
+
+function P_hash(algo, secret, seed, size) {
+  const result = Buffer.alloc(size);
+  let hmac = crypto.createHmac(algo, secret);
+  hmac.update(seed);
+  let a = hmac.digest();
+  let j = 0;
+  while (j < size) {
+    hmac = crypto.createHmac(algo, secret);
+    hmac.update(a);
+    hmac.update(seed);
+    const b = hmac.digest();
+    let todo = b.length;
+    if (j + todo > size) {
+      todo = size - j;
+    }
+    b.copy(result, j, 0, todo);
+    j += todo;
+    hmac = crypto.createHmac(algo, secret);
+    hmac.update(a);
+    a = hmac.digest();
+  }
+  return result;
+}
+
+exports.assertIsCAArray = function assertIsCAArray(certs) {
+  assert(Array.isArray(certs));
+  assert(certs.length > 0);
+
+  // The certificates looks PEM-encoded.
+  for (const cert of certs) {
+    const trimmed = cert.trim();
+    assert.match(trimmed, /^-----BEGIN CERTIFICATE-----/);
+    assert.match(trimmed, /-----END CERTIFICATE-----$/);
+  }
+};
+
+exports.TestTLSSocket = TestTLSSocket;

test/common/tmpdir.js

@@ -0,0 +1,112 @@
+'use strict';
+
+const { spawnSync } = require('child_process');
+const fs = require('fs');
+const path = require('path');
+const { pathToFileURL } = require('url');
+const { isMainThread } = require('worker_threads');
+const isUnixLike = process.platform !== 'win32';
+let escapePOSIXShell;
+
+function rmSync(pathname, useSpawn) {
+  if (useSpawn) {
+    if (isUnixLike) {
+      escapePOSIXShell ??= require('./index.js').escapePOSIXShell;
+      for (let i = 0; i < 3; i++) {
+        const { status } = spawnSync(...escapePOSIXShell`rm -rf "${pathname}"`);
+        if (status === 0) {
+          break;
+        }
+      }
+    } else {
+      spawnSync(
+        process.execPath,
+        [
+          '-e',
+          `fs.rmSync(${JSON.stringify(pathname)}, { maxRetries: 3, recursive: true, force: true });`,
+        ],
+      );
+    }
+  } else {
+    fs.rmSync(pathname, { maxRetries: 3, recursive: true, force: true });
+  }
+}
+
+const testRoot = process.env.NODE_TEST_DIR ?
+  fs.realpathSync(process.env.NODE_TEST_DIR) : path.resolve(__dirname, '..');
+
+// Using a `.` prefixed name, which is the convention for "hidden" on POSIX,
+// gets tools to ignore it by default or by simple rules, especially eslint.
+const tmpdirName = '.tmp.' +
+  (process.env.TEST_SERIAL_ID || process.env.TEST_THREAD_ID || '0');
+let tmpPath = path.join(testRoot, tmpdirName);
+
+let firstRefresh = true;
+function refresh(useSpawn = false) {
+  rmSync(tmpPath, useSpawn);
+  fs.mkdirSync(tmpPath);
+
+  if (firstRefresh) {
+    firstRefresh = false;
+    // Clean only when a test uses refresh. This allows for child processes to
+    // use the tmpdir and only the parent will clean on exit.
+    process.on('exit', () => {
+      return onexit(useSpawn);
+    });
+  }
+}
+
+function onexit(useSpawn) {
+  // Change directory to avoid possible EBUSY
+  if (isMainThread)
+    process.chdir(testRoot);
+
+  try {
+    rmSync(tmpPath, useSpawn);
+  } catch (e) {
+    console.error('Can\'t clean tmpdir:', tmpPath);
+
+    const files = fs.readdirSync(tmpPath);
+    console.error('Files blocking:', files);
+
+    if (files.some((f) => f.startsWith('.nfs'))) {
+      // Warn about NFS "silly rename"
+      console.error('Note: ".nfs*" might be files that were open and ' +
+                    'unlinked but not closed.');
+      console.error('See http://nfs.sourceforge.net/#faq_d2 for details.');
+    }
+
+    console.error();
+    throw e;
+  }
+}
+
+function resolve(...paths) {
+  return path.resolve(tmpPath, ...paths);
+}
+
+function hasEnoughSpace(size) {
+  const { bavail, bsize } = fs.statfsSync(tmpPath);
+  return bavail >= Math.ceil(size / bsize);
+}
+
+function fileURL(...paths) {
+  // When called without arguments, add explicit trailing slash
+  const fullPath = path.resolve(tmpPath + path.sep, ...paths);
+
+  return pathToFileURL(fullPath);
+}
+
+module.exports = {
+  fileURL,
+  hasEnoughSpace,
+  refresh,
+  resolve,
+
+  get path() {
+    return tmpPath;
+  },
+  set path(newPath) {
+    tmpPath = path.resolve(newPath);
+  },
+};

test/common/udp.js

@@ -0,0 +1,24 @@
+'use strict';
+const dgram = require('dgram');
+
+const options = { type: 'udp4', reusePort: true };
+
+function checkSupportReusePort() {
+  return new Promise((resolve, reject) => {
+    const socket = dgram.createSocket(options);
+    socket.bind(0);
+    socket.on('listening', () => {
+      socket.close(resolve);
+    });
+    socket.on('error', (err) => {
+      console.log('The `reusePort` option is not supported:', err.message);
+      socket.close();
+      reject(err);
+    });
+  });
+}
+
+module.exports = {
+  checkSupportReusePort,
+  options,
+};

test/common/v8.js

@@ -0,0 +1,70 @@
+'use strict';
+const assert = require('assert');
+const { GCProfiler } = require('v8');
+
+function collectGCProfile({ duration }) {
+  return new Promise((resolve) => {
+    const profiler = new GCProfiler();
+    profiler.start();
+    setTimeout(() => {
+      resolve(profiler.stop());
+    }, duration);
+  });
+}
+
+function checkGCProfile(data) {
+  assert.ok(data.version > 0);
+  assert.ok(data.startTime >= 0);
+  assert.ok(data.endTime >= 0);
+  assert.ok(Array.isArray(data.statistics));
+  // If the array is not empty, check it
+  if (data.statistics.length) {
+    // Just check the first one
+    const item = data.statistics[0];
+    assert.ok(typeof item.gcType === 'string');
+    assert.ok(item.cost >= 0);
+    assert.ok(typeof item.beforeGC === 'object');
+    assert.ok(typeof item.afterGC === 'object');
+    // The content of beforeGC and afterGC is same, so we just check afterGC
+    assert.ok(typeof item.afterGC.heapStatistics === 'object');
+    const heapStatisticsKeys = [
+      'externalMemory',
+      'heapSizeLimit',
+      'mallocedMemory',
+      'peakMallocedMemory',
+      'totalAvailableSize',
+      'totalGlobalHandlesSize',
+      'totalHeapSize',
+      'totalHeapSizeExecutable',
+      'totalPhysicalSize',
+      'usedGlobalHandlesSize',
+      'usedHeapSize',
+    ];
+    heapStatisticsKeys.forEach((key) => {
+      assert.ok(item.afterGC.heapStatistics[key] >= 0);
+    });
+    assert.ok(typeof item.afterGC.heapSpaceStatistics === 'object');
+    const heapSpaceStatisticsKeys = [
+      'physicalSpaceSize',
+      'spaceAvailableSize',
+      'spaceName',
+      'spaceSize',
+      'spaceUsedSize',
+    ];
+    heapSpaceStatisticsKeys.forEach((key) => {
+      const value = item.afterGC.heapSpaceStatistics[0][key];
+      assert.ok(key === 'spaceName' ? typeof value === 'string' : value >= 0);
+    });
+  }
+}
+
+async function testGCProfiler() {
+  const data = await collectGCProfile({ duration: 5000 });
+  checkGCProfile(data);
+}
+
+module.exports = {
+  collectGCProfile,
+  checkGCProfile,
+  testGCProfiler,
+};

test/common/wasi.js

@@ -0,0 +1,43 @@
+// Test version set to preview1
+'use strict';
+
+const { spawnSyncAndAssert } = require('./child_process');
+const fixtures = require('./fixtures');
+const childPath = fixtures.path('wasi-preview-1.js');
+
+function testWasiPreview1(args, spawnArgs = {}, expectations = {}) {
+  const newEnv = {
+    ...process.env,
+    NODE_DEBUG_NATIVE: 'wasi',
+    NODE_PLATFORM: process.platform,
+    ...spawnArgs.env,
+  };
+  spawnArgs.env = newEnv;
+
+  console.log('Testing with --turbo-fast-api-calls:', ...args);
+  spawnSyncAndAssert(
+    process.execPath, [
+      '--turbo-fast-api-calls',
+      childPath,
+      ...args,
+    ],
+    spawnArgs,
+    expectations,
+  );
+
+  console.log('Testing with --no-turbo-fast-api-calls:', ...args);
+  spawnSyncAndAssert(
+    process.execPath,
+    [
+      '--no-turbo-fast-api-calls',
+      childPath,
+      ...args,
+    ],
+    spawnArgs,
+    expectations,
+  );
+}
+
+module.exports = {
+  testWasiPreview1,
+};

test/common/wpt.js

@@ -0,0 +1,955 @@
+'use strict';
+
+const assert = require('assert');
+const fixtures = require('../common/fixtures');
+const fs = require('fs');
+const fsPromises = fs.promises;
+const path = require('path');
+const events = require('events');
+const os = require('os');
+const { inspect } = require('util');
+const { Worker } = require('worker_threads');
+
+const workerPath = path.join(__dirname, 'wpt/worker.js');
+
+function getBrowserProperties() {
+  const { node: version } = process.versions; // e.g. 18.13.0, 20.0.0-nightly202302078e6e215481
+  const release = /^\d+\.\d+\.\d+$/.test(version);
+  const browser = {
+    browser_channel: release ? 'stable' : 'experimental',
+    browser_version: version,
+  };
+
+  return browser;
+}
+
+/**
+ * Return one of three expected values
+ * https://github.com/web-platform-tests/wpt/blob/1c6ff12/tools/wptrunner/wptrunner/tests/test_update.py#L953-L958
+ */
+function getOs() {
+  switch (os.type()) {
+    case 'Linux':
+      return 'linux';
+    case 'Darwin':
+      return 'mac';
+    case 'Windows_NT':
+      return 'win';
+    default:
+      throw new Error('Unsupported os.type()');
+  }
+}
+
+// https://github.com/web-platform-tests/wpt/blob/b24eedd/resources/testharness.js#L3705
+function sanitizeUnpairedSurrogates(str) {
+  return str.replace(
+    /([\ud800-\udbff]+)(?![\udc00-\udfff])|(^|[^\ud800-\udbff])([\udc00-\udfff]+)/g,
+    function(_, low, prefix, high) {
+      let output = prefix || '';  // Prefix may be undefined
+      const string = low || high;  // Only one of these alternates can match
+      for (let i = 0; i < string.length; i++) {
+        output += codeUnitStr(string[i]);
+      }
+      return output;
+    });
+}
+
+function codeUnitStr(char) {
+  return 'U+' + char.charCodeAt(0).toString(16);
+}
+
+class ReportResult {
+  #startTime;
+
+  constructor(name) {
+    this.test = name;
+    this.status = 'OK';
+    this.subtests = [];
+    this.#startTime = Date.now();
+  }
+
+  addSubtest(name, status, message) {
+    const subtest = {
+      status,
+      // https://github.com/web-platform-tests/wpt/blob/b24eedd/resources/testharness.js#L3722
+      name: sanitizeUnpairedSurrogates(name),
+    };
+    if (message) {
+      // https://github.com/web-platform-tests/wpt/blob/b24eedd/resources/testharness.js#L4506
+      subtest.message = sanitizeUnpairedSurrogates(message);
+    }
+    this.subtests.push(subtest);
+    return subtest;
+  }
+
+  finish(status) {
+    this.status = status ?? 'OK';
+    this.duration = Date.now() - this.#startTime;
+  }
+}
+
+// Generates a report that can be uploaded to wpt.fyi.
+// Checkout https://github.com/web-platform-tests/wpt.fyi/tree/main/api#results-creation
+// for more details.
+class WPTReport {
+  constructor(path) {
+    this.filename = `report-${path.replaceAll('/', '-')}.json`;
+    /** @type {Map<string, ReportResult>} */
+    this.results = new Map();
+    this.time_start = Date.now();
+  }
+
+  /**
+   * Get or create a ReportResult for a test spec.
+   * @param {WPTTestSpec} spec
+   */
+  getResult(spec) {
+    const name = `/${spec.getRelativePath()}${spec.variant}`;
+    if (this.results.has(name)) {
+      return this.results.get(name);
+    }
+    const result = new ReportResult(name);
+    this.results.set(name, result);
+    return result;
+  }
+
+  write() {
+    this.time_end = Date.now();
+    const results = Array.from(this.results.values())
+      .map((result) => {
+        const url = new URL(result.test, 'http://wpt');
+        url.pathname = url.pathname.replace(/\.js$/, '.html');
+        result.test = url.href.slice(url.origin.length);
+        return result;
+      });
+
+    /**
+     * Return required and some optional properties
+     * https://github.com/web-platform-tests/wpt.fyi/blob/60da175/api/README.md?plain=1#L331-L335
+     */
+    this.run_info = {
+      product: 'node.js',
+      ...getBrowserProperties(),
+      revision: process.env.WPT_REVISION || 'unknown',
+      os: getOs(),
+    };
+
+    fs.writeFileSync(`out/wpt/${this.filename}`, JSON.stringify({
+      time_start: this.time_start,
+      time_end: this.time_end,
+      run_info: this.run_info,
+      results: results,
+    }));
+  }
+}
+
+// https://github.com/web-platform-tests/wpt/blob/HEAD/resources/testharness.js
+// TODO: get rid of this half-baked harness in favor of the one
+// pulled from WPT
+const harnessMock = {
+  test: (fn, desc) => {
+    try {
+      fn();
+    } catch (err) {
+      console.error(`In ${desc}:`);
+      throw err;
+    }
+  },
+  assert_equals: assert.strictEqual,
+  assert_true: (value, message) => assert.strictEqual(value, true, message),
+  assert_false: (value, message) => assert.strictEqual(value, false, message),
+  assert_throws: (code, func, desc) => {
+    assert.throws(func, function(err) {
+      return typeof err === 'object' &&
+             'name' in err &&
+             err.name.startsWith(code.name);
+    }, desc);
+  },
+  assert_array_equals: assert.deepStrictEqual,
+  assert_unreached(desc) {
+    assert.fail(`Reached unreachable code: ${desc}`);
+  },
+};
+
+class ResourceLoader {
+  constructor(path) {
+    this.path = path;
+  }
+
+  toRealFilePath(from, url) {
+    // We need to patch this to load the WebIDL parser
+    url = url.replace(
+      '/resources/WebIDLParser.js',
+      '/resources/webidl2/lib/webidl2.js',
+    );
+    const base = path.dirname(from);
+    return url.startsWith('/') ?
+      fixtures.path('wpt', url) :
+      fixtures.path('wpt', base, url);
+  }
+
+  /**
+   * Load a resource in test/fixtures/wpt specified with a URL
+   * @param {string} from the path of the file loading this resource,
+   *                      relative to the WPT folder.
+   * @param {string} url the url of the resource being loaded.
+   */
+  read(from, url) {
+    const file = this.toRealFilePath(from, url);
+    return fs.readFileSync(file, 'utf8');
+  }
+
+  /**
+   * Load a resource in test/fixtures/wpt specified with a URL
+   * @param {string} from the path of the file loading this resource,
+   *                      relative to the WPT folder.
+   * @param {string} url the url of the resource being loaded.
+   */
+  async readAsFetch(from, url) {
+    const file = this.toRealFilePath(from, url);
+    const data = await fsPromises.readFile(file);
+    return {
+      ok: true,
+      arrayBuffer() { return data.buffer; },
+      json() { return JSON.parse(data.toString()); },
+      text() { return data.toString(); },
+    };
+  }
+}
+
+class StatusRule {
+  constructor(key, value, pattern) {
+    this.key = key;
+    this.requires = value.requires || [];
+    this.fail = value.fail;
+    this.skip = value.skip;
+    if (pattern) {
+      this.pattern = this.transformPattern(pattern);
+    }
+    // TODO(joyeecheung): implement this
+    this.scope = value.scope;
+    this.comment = value.comment;
+  }
+
+  /**
+   * Transform a filename pattern into a RegExp
+   * @param {string} pattern
+   * @returns {RegExp}
+   */
+  transformPattern(pattern) {
+    const result = path.normalize(pattern).replace(/[-/\\^$+?.()|[\]{}]/g, '\\$&');
+    return new RegExp(result.replace('*', '.*'));
+  }
+}
+
+class StatusRuleSet {
+  constructor() {
+    // We use two sets of rules to speed up matching
+    this.exactMatch = {};
+    this.patternMatch = [];
+  }
+
+  /**
+   * @param {object} rules
+   */
+  addRules(rules) {
+    for (const key of Object.keys(rules)) {
+      if (key.includes('*')) {
+        this.patternMatch.push(new StatusRule(key, rules[key], key));
+      } else {
+        const normalizedPath = path.normalize(key);
+        this.exactMatch[normalizedPath] = new StatusRule(key, rules[key]);
+      }
+    }
+  }
+
+  match(file) {
+    const result = [];
+    const exact = this.exactMatch[file];
+    if (exact) {
+      result.push(exact);
+    }
+    for (const item of this.patternMatch) {
+      if (item.pattern.test(file)) {
+        result.push(item);
+      }
+    }
+    return result;
+  }
+}
+
+// A specification of WPT test
+class WPTTestSpec {
+  #content;
+
+  /**
+   * @param {string} mod name of the WPT module, e.g.
+   *                     'html/webappapis/microtask-queuing'
+   * @param {string} filename path of the test, relative to mod, e.g.
+   *                          'test.any.js'
+   * @param {StatusRule[]} rules
+   * @param {string} variant test file variant
+   */
+  constructor(mod, filename, rules, variant = '') {
+    this.module = mod;
+    this.filename = filename;
+    this.variant = variant;
+
+    this.requires = new Set();
+    this.failedTests = [];
+    this.flakyTests = [];
+    this.skipReasons = [];
+    for (const item of rules) {
+      if (item.requires.length) {
+        for (const req of item.requires) {
+          this.requires.add(req);
+        }
+      }
+      if (Array.isArray(item.fail?.expected)) {
+        this.failedTests.push(...item.fail.expected);
+      }
+      if (Array.isArray(item.fail?.flaky)) {
+        this.failedTests.push(...item.fail.flaky);
+        this.flakyTests.push(...item.fail.flaky);
+      }
+      if (item.skip) {
+        this.skipReasons.push(item.skip);
+      }
+    }
+
+    this.failedTests = [...new Set(this.failedTests)];
+    this.flakyTests = [...new Set(this.flakyTests)];
+    this.skipReasons = [...new Set(this.skipReasons)];
+  }
+
+  /**
+   * @param {string} mod
+   * @param {string} filename
+   * @param {StatusRule[]} rules
+   */
+  static from(mod, filename, rules) {
+    const spec = new WPTTestSpec(mod, filename, rules);
+    const meta = spec.getMeta();
+    return meta.variant?.map((variant) => new WPTTestSpec(mod, filename, rules, variant)) || [spec];
+  }
+
+  getRelativePath() {
+    return path.join(this.module, this.filename);
+  }
+
+  getAbsolutePath() {
+    return fixtures.path('wpt', this.getRelativePath());
+  }
+
+  /**
+   * @returns {string}
+   */
+  getContent() {
+    this.#content ||= fs.readFileSync(this.getAbsolutePath(), 'utf8');
+    return this.#content;
+  }
+
+  /**
+   * @returns {{ script?: string[]; variant?: string[]; [key: string]: string }} parsed META tags of a spec file
+   */
+  getMeta() {
+    const matches = this.getContent().match(/\/\/ META: .+/g);
+    if (!matches) {
+      return {};
+    }
+    const result = {};
+    for (const match of matches) {
+      const parts = match.match(/\/\/ META: ([^=]+?)=(.+)/);
+      const key = parts[1];
+      const value = parts[2];
+      if (key === 'script' || key === 'variant') {
+        if (result[key]) {
+          result[key].push(value);
+        } else {
+          result[key] = [value];
+        }
+      } else {
+        result[key] = value;
+      }
+    }
+    return result;
+  }
+}
+
+const kIntlRequirement = {
+  none: 0,
+  small: 1,
+  full: 2,
+  // TODO(joyeecheung): we may need to deal with --with-intl=system-icu
+};
+
+class BuildRequirement {
+  constructor() {
+    this.currentIntl = kIntlRequirement.none;
+    if (process.config.variables.v8_enable_i18n_support === 0) {
+      this.currentIntl = kIntlRequirement.none;
+      return;
+    }
+    // i18n enabled
+    if (process.config.variables.icu_small) {
+      this.currentIntl = kIntlRequirement.small;
+    } else {
+      this.currentIntl = kIntlRequirement.full;
+    }
+    // Not using common.hasCrypto because of the global leak checks
+    this.hasCrypto = Boolean(process.versions.openssl) &&
+      !process.env.NODE_SKIP_CRYPTO;
+  }
+
+  /**
+   * @param {Set} requires
+   * @returns {string|false} The config that the build is lacking, or false
+   */
+  isLacking(requires) {
+    const current = this.currentIntl;
+    if (requires.has('full-icu') && current !== kIntlRequirement.full) {
+      return 'full-icu';
+    }
+    if (requires.has('small-icu') && current < kIntlRequirement.small) {
+      return 'small-icu';
+    }
+    if (requires.has('crypto') && !this.hasCrypto) {
+      return 'crypto';
+    }
+    return false;
+  }
+}
+
+const buildRequirements = new BuildRequirement();
+
+class StatusLoader {
+  /**
+   * @param {string} path relative path of the WPT subset
+   */
+  constructor(path) {
+    this.path = path;
+    this.rules = new StatusRuleSet();
+    /** @type {WPTTestSpec[]} */
+    this.specs = [];
+  }
+
+  /**
+   * Grep for all .*.js file recursively in a directory.
+   * @param {string} dir
+   */
+  grep(dir) {
+    let result = [];
+    const list = fs.readdirSync(dir);
+    for (const file of list) {
+      const filepath = path.join(dir, file);
+      const stat = fs.statSync(filepath);
+      if (stat.isDirectory()) {
+        const list = this.grep(filepath);
+        result = result.concat(list);
+      } else {
+        if (!(/\.\w+\.js$/.test(filepath))) {
+          continue;
+        }
+        result.push(filepath);
+      }
+    }
+    return result;
+  }
+
+  load() {
+    const dir = path.join(__dirname, '..', 'wpt');
+    let statusFile = path.join(dir, 'status', `${this.path}.json`);
+    let result;
+
+    if (fs.existsSync(statusFile)) {
+      result = JSON.parse(fs.readFileSync(statusFile, 'utf8'));
+    } else {
+      statusFile = path.join(dir, 'status', `${this.path}.cjs`);
+      result = require(statusFile);
+    }
+
+    this.rules.addRules(result);
+
+    const subDir = fixtures.path('wpt', this.path);
+    const list = this.grep(subDir);
+    for (const file of list) {
+      const relativePath = path.relative(subDir, file);
+      const match = this.rules.match(relativePath);
+      this.specs.push(...WPTTestSpec.from(this.path, relativePath, match));
+    }
+  }
+}
+
+const kPass = 'pass';
+const kFail = 'fail';
+const kSkip = 'skip';
+const kTimeout = 'timeout';
+const kIncomplete = 'incomplete';
+const kUncaught = 'uncaught';
+const NODE_UNCAUGHT = 100;
+
+const limit = (concurrency) => {
+  let running = 0;
+  const queue = [];
+
+  const execute = async (fn) => {
+    if (running < concurrency) {
+      running++;
+      try {
+        await fn();
+      } finally {
+        running--;
+        if (queue.length > 0) {
+          execute(queue.shift());
+        }
+      }
+    } else {
+      queue.push(fn);
+    }
+  };
+
+  return execute;
+};
+
+class WPTRunner {
+  constructor(path, { concurrency = os.availableParallelism() - 1 || 1 } = {}) {
+    this.path = path;
+    this.resource = new ResourceLoader(path);
+    this.concurrency = concurrency;
+
+    this.flags = [];
+    this.globalThisInitScripts = [];
+    this.initScript = null;
+
+    this.status = new StatusLoader(path);
+    this.status.load();
+    this.specs = new Set(this.status.specs);
+
+    this.results = {};
+    this.inProgress = new Set();
+    this.workers = new Map();
+    this.unexpectedFailures = [];
+
+    if (process.env.WPT_REPORT != null) {
+      this.report = new WPTReport(path);
+    }
+  }
+
+  /**
+   * Sets the Node.js flags passed to the worker.
+   * @param {string[]} flags
+   */
+  setFlags(flags) {
+    this.flags = flags;
+  }
+
+  /**
+   * Sets a script to be run in the worker before executing the tests.
+   * @param {string} script
+   */
+  setInitScript(script) {
+    this.initScript = script;
+  }
+
+  /**
+   * Set the scripts modifier for each script.
+   * @param {(meta: { code: string, filename: string }) => void} modifier
+   */
+  setScriptModifier(modifier) {
+    this.scriptsModifier = modifier;
+  }
+
+  /**
+   * @param {WPTTestSpec} spec
+   */
+  fullInitScript(spec) {
+    const url = new URL(`/${spec.getRelativePath().replace(/\.js$/, '.html')}${spec.variant}`, 'http://wpt');
+    const title = spec.getMeta().title;
+    let { initScript } = this;
+
+    initScript = `${initScript}\n\n//===\nglobalThis.location = new URL("${url.href}");`;
+
+    if (title) {
+      initScript = `${initScript}\n\n//===\nglobalThis.META_TITLE = "${title}";`;
+    }
+
+    if (this.globalThisInitScripts.length === null) {
+      return initScript;
+    }
+
+    const globalThisInitScript = this.globalThisInitScripts.join('\n\n//===\n');
+
+    if (initScript === null) {
+      return globalThisInitScript;
+    }
+
+    return `${globalThisInitScript}\n\n//===\n${initScript}`;
+  }
+
+  /**
+   * Pretend the runner is run in `name`'s environment (globalThis).
+   * @param {'Window'} name
+   * @see {@link https://github.com/nodejs/node/blob/24673ace8ae196bd1c6d4676507d6e8c94cf0b90/test/fixtures/wpt/resources/idlharness.js#L654-L671}
+   */
+  pretendGlobalThisAs(name) {
+    switch (name) {
+      case 'Window': {
+        this.globalThisInitScripts.push('globalThis.Window = Object.getPrototypeOf(globalThis).constructor;');
+        break;
+      }
+
+      // TODO(XadillaX): implement `ServiceWorkerGlobalScope`,
+      // `DedicateWorkerGlobalScope`, etc.
+      //
+      // e.g. `ServiceWorkerGlobalScope` should implement dummy
+      // `addEventListener` and so on.
+
+      default: throw new Error(`Invalid globalThis type ${name}.`);
+    }
+  }
+
+  // TODO(joyeecheung): work with the upstream to port more tests in .html
+  // to .js.
+  async runJsTests() {
+    const queue = this.buildQueue();
+
+    const run = limit(this.concurrency);
+
+    for (const spec of queue) {
+      const content = spec.getContent();
+      const meta = spec.getMeta(content);
+
+      const absolutePath = spec.getAbsolutePath();
+      const relativePath = spec.getRelativePath();
+      const harnessPath = fixtures.path('wpt', 'resources', 'testharness.js');
+
+      // Scripts specified with the `// META: script=` header
+      const scriptsToRun = meta.script?.map((script) => {
+        const obj = {
+          filename: this.resource.toRealFilePath(relativePath, script),
+          code: this.resource.read(relativePath, script),
+        };
+        this.scriptsModifier?.(obj);
+        return obj;
+      }) ?? [];
+      // The actual test
+      const obj = {
+        code: content,
+        filename: absolutePath,
+      };
+      this.scriptsModifier?.(obj);
+      scriptsToRun.push(obj);
+
+      run(async () => {
+        const worker = new Worker(workerPath, {
+          execArgv: this.flags,
+          workerData: {
+            testRelativePath: relativePath,
+            wptRunner: __filename,
+            wptPath: this.path,
+            initScript: this.fullInitScript(spec),
+            harness: {
+              code: fs.readFileSync(harnessPath, 'utf8'),
+              filename: harnessPath,
+            },
+            scriptsToRun,
+            needsGc: !!meta.script?.find((script) => script === '/common/gc.js'),
+          },
+        });
+        this.inProgress.add(spec);
+        this.workers.set(spec, worker);
+
+        const reportResult = this.report?.getResult(spec);
+        worker.on('message', (message) => {
+          switch (message.type) {
+            case 'result':
+              return this.resultCallback(spec, message.result, reportResult);
+            case 'completion':
+              return this.completionCallback(spec, message.status, reportResult);
+            default:
+              throw new Error(`Unexpected message from worker: ${message.type}`);
+          }
+        });
+
+        worker.on('error', (err) => {
+          if (!this.inProgress.has(spec)) {
+            // The test is already finished. Ignore errors that occur after it.
+            // This can happen normally, for example in timers tests.
+            return;
+          }
+          // Generate a subtest failure for visibility.
+          // No need to record this synthetic failure with wpt.fyi.
+          this.fail(
+            spec,
+            {
+              status: NODE_UNCAUGHT,
+              name: 'evaluation in WPTRunner.runJsTests()',
+              message: err.message,
+              stack: inspect(err),
+            },
+            kUncaught,
+          );
+          // Mark the whole test as failed in wpt.fyi report.
+          reportResult?.finish('ERROR');
+          this.inProgress.delete(spec);
+        });
+
+        await events.once(worker, 'exit').catch(() => {});
+      });
+    }
+
+    process.on('exit', () => {
+      for (const spec of this.inProgress) {
+        // No need to record this synthetic failure with wpt.fyi.
+        this.fail(spec, { name: 'Incomplete' }, kIncomplete);
+        // Mark the whole test as failed in wpt.fyi report.
+        const reportResult = this.report?.getResult(spec);
+        reportResult?.finish('ERROR');
+      }
+      inspect.defaultOptions.depth = Infinity;
+      // Sorts the rules to have consistent output
+      console.log('');
+      console.log(JSON.stringify(Object.keys(this.results).sort().reduce(
+        (obj, key) => {
+          obj[key] = this.results[key];
+          return obj;
+        },
+        {},
+      ), null, 2));
+
+      const failures = [];
+      let expectedFailures = 0;
+      let skipped = 0;
+      for (const [key, item] of Object.entries(this.results)) {
+        if (item.fail?.unexpected) {
+          failures.push(key);
+        }
+        if (item.fail?.expected) {
+          expectedFailures++;
+        }
+        if (item.skip) {
+          skipped++;
+        }
+      }
+
+      const unexpectedPasses = [];
+      for (const specs of queue) {
+        const key = specs.filename;
+
+        // File has no expected failures
+        if (!specs.failedTests.length) {
+          continue;
+        }
+
+        // File was (maybe even conditionally) skipped
+        if (this.results[key]?.skip) {
+          continue;
+        }
+
+        // Full check: every expected to fail test is present
+        if (specs.failedTests.some((expectedToFail) => {
+          if (specs.flakyTests.includes(expectedToFail)) {
+            return false;
+          }
+          return this.results[key]?.fail?.expected?.includes(expectedToFail) !== true;
+        })) {
+          unexpectedPasses.push(key);
+          continue;
+        }
+      }
+
+      this.report?.write();
+
+      const ran = queue.length;
+      const total = ran + skipped;
+      const passed = ran - expectedFailures - failures.length;
+      console.log('');
+      console.log(`Ran ${ran}/${total} tests, ${skipped} skipped,`,
+                  `${passed} passed, ${expectedFailures} expected failures,`,
+                  `${failures.length} unexpected failures,`,
+                  `${unexpectedPasses.length} unexpected passes`);
+      if (failures.length > 0) {
+        const file = path.join('test', 'wpt', 'status', `${this.path}.json`);
+        throw new Error(
+          `Found ${failures.length} unexpected failures. ` +
+          `Consider updating ${file} for these files:\n${failures.join('\n')}`);
+      }
+      if (unexpectedPasses.length > 0) {
+        const file = path.join('test', 'wpt', 'status', `${this.path}.json`);
+        throw new Error(
+          `Found ${unexpectedPasses.length} unexpected passes. ` +
+          `Consider updating ${file} for these files:\n${unexpectedPasses.join('\n')}`);
+      }
+    });
+  }
+
+  // Map WPT test status to strings
+  getTestStatus(status) {
+    switch (status) {
+      case 1:
+        return kFail;
+      case 2:
+        return kTimeout;
+      case 3:
+        return kIncomplete;
+      case NODE_UNCAUGHT:
+        return kUncaught;
+      default:
+        return kPass;
+    }
+  }
+
+  /**
+   * Report the status of each specific test case (there could be multiple
+   * in one test file).
+   * @param {WPTTestSpec} spec
+   * @param {Test} test  The Test object returned by WPT harness
+   * @param {ReportResult} reportResult The report result object
+   */
+  resultCallback(spec, test, reportResult) {
+    const status = this.getTestStatus(test.status);
+    if (status !== kPass) {
+      this.fail(spec, test, status, reportResult);
+    } else {
+      this.succeed(test, status, reportResult);
+    }
+  }
+
+  /**
+   * Report the status of each WPT test (one per file)
+   * @param {WPTTestSpec} spec
+   * @param {object} harnessStatus - The status object returned by WPT harness.
+   * @param {ReportResult} reportResult The report result object
+   */
+  completionCallback(spec, harnessStatus, reportResult) {
+    const status = this.getTestStatus(harnessStatus.status);
+
+    // Treat it like a test case failure
+    if (status === kTimeout) {
+      // No need to record this synthetic failure with wpt.fyi.
+      this.fail(spec, { name: 'WPT testharness timeout' }, kTimeout);
+      // Mark the whole test as TIMEOUT in wpt.fyi report.
+      reportResult?.finish('TIMEOUT');
+    } else if (status !== kPass) {
+      // No need to record this synthetic failure with wpt.fyi.
+      this.fail(spec, {
+        status: status,
+        name: 'WPT test harness error',
+        message: harnessStatus.message,
+        stack: harnessStatus.stack,
+      }, status);
+      // Mark the whole test as ERROR in wpt.fyi report.
+      reportResult?.finish('ERROR');
+    } else {
+      reportResult?.finish();
+    }
+    this.inProgress.delete(spec);
+    // Always force termination of the worker. Some tests allocate resources
+    // that would otherwise keep it alive.
+    this.workers.get(spec).terminate();
+  }
+
+  addTestResult(spec, item) {
+    let result = this.results[spec.filename];
+    result ||= this.results[spec.filename] = {};
+    if (item.status === kSkip) {
+      // { filename: { skip: 'reason' } }
+      result[kSkip] = item.reason;
+    } else {
+      // { filename: { fail: { expected: [ ... ],
+      //                      unexpected: [ ... ] } }}
+      result[item.status] ||= {};
+      const key = item.expected ? 'expected' : 'unexpected';
+      result[item.status][key] ||= [];
+      const hasName = result[item.status][key].includes(item.name);
+      if (!hasName) {
+        result[item.status][key].push(item.name);
+      }
+    }
+  }
+
+  succeed(test, status, reportResult) {
+    console.log(`[${status.toUpperCase()}] ${test.name}`);
+    reportResult?.addSubtest(test.name, 'PASS');
+  }
+
+  fail(spec, test, status, reportResult) {
+    const expected = spec.failedTests.includes(test.name);
+    if (expected) {
+      console.log(`[EXPECTED_FAILURE][${status.toUpperCase()}] ${test.name}`);
+    } else {
+      console.log(`[UNEXPECTED_FAILURE][${status.toUpperCase()}] ${test.name}`);
+    }
+    if (status === kFail || status === kUncaught) {
+      console.log(test.message);
+      console.log(test.stack);
+    }
+    const command = `${process.execPath} ${process.execArgv}` +
+                    ` ${require.main.filename} '${spec.filename}${spec.variant}'`;
+    console.log(`Command: ${command}\n`);
+
+    reportResult?.addSubtest(test.name, 'FAIL', test.message);
+
+    this.addTestResult(spec, {
+      name: test.name,
+      expected,
+      status: kFail,
+      reason: test.message || status,
+    });
+  }
+
+  skip(spec, reasons) {
+    const joinedReasons = reasons.join('; ');
+    console.log(`[SKIPPED] ${spec.filename}${spec.variant}: ${joinedReasons}`);
+    this.addTestResult(spec, {
+      status: kSkip,
+      reason: joinedReasons,
+    });
+  }
+
+  buildQueue() {
+    const queue = [];
+    let argFilename;
+    let argVariant;
+    if (process.argv[2]) {
+      ([argFilename, argVariant = ''] = process.argv[2].split('?'));
+    }
+    for (const spec of this.specs) {
+      if (argFilename) {
+        if (spec.filename === argFilename && (!argVariant || spec.variant.substring(1) === argVariant)) {
+          queue.push(spec);
+        }
+        continue;
+      }
+
+      if (spec.skipReasons.length > 0) {
+        this.skip(spec, spec.skipReasons);
+        continue;
+      }
+
+      const lackingSupport = buildRequirements.isLacking(spec.requires);
+      if (lackingSupport) {
+        this.skip(spec, [ `requires ${lackingSupport}` ]);
+        continue;
+      }
+
+      queue.push(spec);
+    }
+
+    // If the tests are run as `node test/wpt/test-something.js subset.any.js`,
+    // only `subset.any.js` (all variants) will be run by the runner.
+    // If the tests are run as `node test/wpt/test-something.js 'subset.any.js?1-10'`,
+    // only the `?1-10` variant of `subset.any.js` will be run by the runner.
+    if (argFilename && queue.length === 0) {
+      throw new Error(`${process.argv[2]} not found!`);
+    }
+
+    return queue;
+  }
+}
+
+module.exports = {
+  harness: harnessMock,
+  ResourceLoader,
+  WPTRunner,
+};

test/common/wpt/worker.js

@@ -0,0 +1,70 @@
+'use strict';
+
+const { runInNewContext, runInThisContext } = require('vm');
+const { setFlagsFromString } = require('v8');
+const { parentPort, workerData } = require('worker_threads');
+
+const { ResourceLoader } = require(workerData.wptRunner);
+const resource = new ResourceLoader(workerData.wptPath);
+
+if (workerData.needsGc) {
+  // See https://github.com/nodejs/node/issues/16595#issuecomment-340288680
+  setFlagsFromString('--expose-gc');
+  globalThis.gc = runInNewContext('gc');
+}
+
+globalThis.self = global;
+globalThis.GLOBAL = {
+  isWindow() { return false; },
+  isShadowRealm() { return false; },
+};
+globalThis.require = require;
+
+// This is a mock for non-fetch tests that use fetch to resolve
+// a relative fixture file.
+// Actual Fetch API WPTs are executed in nodejs/undici.
+globalThis.fetch = function fetch(file) {
+  return resource.readAsFetch(workerData.testRelativePath, file);
+};
+
+if (workerData.initScript) {
+  runInThisContext(workerData.initScript);
+}
+
+runInThisContext(workerData.harness.code, {
+  filename: workerData.harness.filename,
+});
+
+// eslint-disable-next-line no-undef
+add_result_callback((result) => {
+  parentPort.postMessage({
+    type: 'result',
+    result: {
+      status: result.status,
+      name: result.name,
+      message: result.message,
+      stack: result.stack,
+    },
+  });
+});
+
+// Keep the event loop alive
+const timeout = setTimeout(() => {
+  parentPort.postMessage({
+    type: 'completion',
+    status: { status: 2 },
+  });
+}, 2 ** 31 - 1); // Max timeout is 2^31-1, when overflown the timeout is set to 1.
+
+// eslint-disable-next-line no-undef
+add_completion_callback((_, status) => {
+  clearTimeout(timeout);
+  parentPort.postMessage({
+    type: 'completion',
+    status,
+  });
+});
+
+for (const scriptToRun of workerData.scriptsToRun) {
+  runInThisContext(scriptToRun.code, { filename: scriptToRun.filename });
+}