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test/parallel/test-worker-message-not-serializable.js

@@ -0,0 +1,24 @@
+'use strict';
+
+// Flags: --expose-internals
+
+// Check that main thread handles unserializable errors in a worker thread as
+// expected.
+
+const common = require('../common');
+
+const assert = require('assert');
+
+const { Worker } = require('worker_threads');
+
+const worker = new Worker(`
+  const { internalBinding } = require('internal/test/binding');
+  const { getEnvMessagePort } = internalBinding('worker');
+  const { messageTypes } = require('internal/worker/io');
+  const messagePort = getEnvMessagePort();
+  messagePort.postMessage({ type: messageTypes.COULD_NOT_SERIALIZE_ERROR });
+`, { eval: true });
+
+worker.on('error', common.mustCall((e) => {
+  assert.strictEqual(e.code, 'ERR_WORKER_UNSERIALIZABLE_ERROR');
+}));