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test/fixtures/es-module-shadow-realm/custom-loaders.js

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+// This fixture is used to test that custom loaders are not enabled in the ShadowRealm.
+
+'use strict';
+const assert = require('assert');
+
+async function workInChildProcess() {
+  // Assert that the process is running with a custom loader.
+  const moduleNamespace = await import('file:///42.mjs');
+  assert.strictEqual(moduleNamespace.default, 42);
+
+  const realm = new ShadowRealm();
+  await assert.rejects(realm.importValue('file:///42.mjs', 'default'), TypeError);
+}
+
+workInChildProcess();

test/fixtures/es-module-shadow-realm/preload-main.js

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+// This fixture is used to test that --require preload modules are not enabled in the ShadowRealm.
+
+'use strict';
+const assert = require('assert');
+
+assert.strictEqual(globalThis.preload, 42);
+const realm = new ShadowRealm();
+const value = realm.evaluate(`globalThis.preload`);
+assert.strictEqual(value, undefined);

test/fixtures/es-module-shadow-realm/preload.js

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+globalThis.preload = 42;

test/fixtures/es-module-shadow-realm/re-export-state-counter.mjs

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+// This module verifies that the module specifier is resolved relative to the
+// current module and not the current working directory in the ShadowRealm.
+export { getCounter } from "./state-counter.mjs";

test/fixtures/es-module-shadow-realm/state-counter.mjs

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+let counter = 0;
+export const getCounter = () => {
+  return counter++;
+};