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Instead of passing the payload for Workers directly to `.onmessage`, perform something more similar to what the browser API provides, namely create an event object with a `.data` property. This does not make `MessagePort` implement the `EventTarget` API, nor does it implement the full `MessageEvent` API, but it would make such extensions non-breaking changes if we desire them at some point in the future. (This would be a breaking change if Workers were not experimental. Currently, this method is also undocumented and only exists with the idea of enabling some degree of Web compatibility.) PR-URL: https://github.com/nodejs/node/pull/26082 Reviewed-By: Gus Caplan <me@gus.host> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Denys Otrishko <shishugi@gmail.com>
45 lines
1.4 KiB
JavaScript
45 lines
1.4 KiB
JavaScript
'use strict';
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const common = require('../common');
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const assert = require('assert');
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const util = require('util');
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const { MessageChannel } = require('worker_threads');
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const tick = require('../common/tick');
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const { port1, port2 } = new MessageChannel();
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assert.throws(common.mustCall(() => {
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port1.postMessage(null, [port1]);
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}), common.mustCall((err) => {
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assert.strictEqual(err.name, 'DataCloneError');
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assert.strictEqual(err.message, 'Transfer list contains source port');
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assert.strictEqual(err.code, 25);
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assert.ok(err instanceof Error);
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const DOMException = err.constructor;
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assert.ok(err instanceof DOMException);
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assert.strictEqual(DOMException.name, 'DOMException');
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return true;
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}));
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// The failed transfer should not affect the ports in anyway.
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port2.onmessage = common.mustCall((message) => {
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assert.strictEqual(message.data, 2);
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const inspectedPort1 = util.inspect(port1);
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const inspectedPort2 = util.inspect(port2);
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assert(inspectedPort1.includes('active: true'), inspectedPort1);
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assert(inspectedPort2.includes('active: true'), inspectedPort2);
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port1.close();
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tick(10, () => {
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const inspectedPort1 = util.inspect(port1);
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const inspectedPort2 = util.inspect(port2);
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assert(inspectedPort1.includes('active: false'), inspectedPort1);
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assert(inspectedPort2.includes('active: false'), inspectedPort2);
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});
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});
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port1.postMessage(2);
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