mirror of https://github.com/nodejs/node.git
60 lines
1.5 KiB
JavaScript
60 lines
1.5 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 { MessageChannel, markAsUntransferable, isMarkedAsUntransferable } = require('worker_threads');
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{
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const ab = new ArrayBuffer(8);
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markAsUntransferable(ab);
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assert.ok(isMarkedAsUntransferable(ab));
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assert.strictEqual(ab.byteLength, 8);
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const { port1 } = new MessageChannel();
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assert.throws(() => port1.postMessage(ab, [ ab ]), {
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code: 25,
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name: 'DataCloneError',
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});
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assert.strictEqual(ab.byteLength, 8); // The AB is not detached.
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}
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{
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const channel1 = new MessageChannel();
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const channel2 = new MessageChannel();
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markAsUntransferable(channel2.port1);
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assert.ok(isMarkedAsUntransferable(channel2.port1));
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assert.throws(() => {
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channel1.port1.postMessage(channel2.port1, [ channel2.port1 ]);
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}, {
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code: 25,
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name: 'DataCloneError',
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});
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channel2.port1.postMessage('still works, not closed/transferred');
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channel2.port2.once('message', common.mustCall());
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}
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{
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for (const value of [0, null, false, true, undefined]) {
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markAsUntransferable(value); // Has no visible effect.
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assert.ok(!isMarkedAsUntransferable(value));
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}
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for (const value of [[], {}]) {
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markAsUntransferable(value);
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assert.ok(isMarkedAsUntransferable(value));
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}
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}
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{
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// Verifies that the mark is not inherited.
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class Foo {}
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markAsUntransferable(Foo.prototype);
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assert.ok(isMarkedAsUntransferable(Foo.prototype));
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const foo = new Foo();
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assert.ok(!isMarkedAsUntransferable(foo));
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}
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