node/test/node-api/test_worker_buffer_callback/test.js

'use strict';
const common = require('../../common');
const assert = require('assert');
const { MessageChannel } = require('worker_threads');
const { buffer } = require(`./build/${common.buildType}/binding`);

// Test that buffers allocated with a free callback through our APIs are not
// transferred.

const { port1 } = new MessageChannel();
const origByteLength = buffer.byteLength;
assert.throws(() => port1.postMessage(buffer, [buffer]), {
  code: 25,
  name: 'DataCloneError',
});

assert.strictEqual(buffer.byteLength, origByteLength);
assert.notStrictEqual(buffer.byteLength, 0);