'use strict'; const common = require('../common'); const assert = require('assert'); const util = require('util'); const { MessageChannel } = require('worker_threads'); const tick = require('../common/tick'); const { port1, port2 } = new MessageChannel(); assert.throws(common.mustCall(() => { port1.postMessage(null, [port1]); }), common.mustCall((err) => { assert.strictEqual(err.name, 'DataCloneError'); assert.strictEqual(err.message, 'Transfer list contains source port'); assert.strictEqual(err.code, 25); assert.ok(err instanceof Error); const DOMException = err.constructor; assert.ok(err instanceof DOMException); assert.strictEqual(DOMException.name, 'DOMException'); return true; })); // The failed transfer should not affect the ports in anyway. port2.onmessage = common.mustCall((message) => { assert.strictEqual(message.data, 2); const inspectedPort1 = util.inspect(port1); const inspectedPort2 = util.inspect(port2); assert(inspectedPort1.includes('active: true'), inspectedPort1); assert(inspectedPort2.includes('active: true'), inspectedPort2); port1.close(); tick(10, () => { const inspectedPort1 = util.inspect(port1); const inspectedPort2 = util.inspect(port2); assert(inspectedPort1.includes('active: false'), inspectedPort1); assert(inspectedPort2.includes('active: false'), inspectedPort2); }); }); port1.postMessage(2);