forked from jestjs/jest
/
leak-integration.test.ts
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/
leak-integration.test.ts
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/**
* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
import {tmpdir} from 'os';
import {join} from 'path';
import {writeFileSync} from 'graceful-fs';
import LeakDetector from 'jest-leak-detector';
import {Worker} from '../../build/index';
describe('WorkerThreads leaks', () => {
let workerFile!: string;
beforeAll(() => {
workerFile = join(tmpdir(), 'baz.js');
writeFileSync(workerFile, 'module.exports.fn = () => {};');
});
let worker!: Worker;
beforeEach(() => {
worker = new Worker(workerFile, {
enableWorkerThreads: true,
exposedMethods: ['fn'],
});
});
afterEach(async () => {
await worker.end();
});
it('does not retain arguments after a task finished', async () => {
let leakDetector!: LeakDetector;
await new Promise((resolve, reject) => {
const obj = {};
leakDetector = new LeakDetector(obj);
(worker as any).fn(obj).then(resolve, reject);
});
expect(await leakDetector.isLeaking()).toBe(false);
});
});
describe('Worker leaks', () => {
let workerFile!: string;
beforeAll(() => {
workerFile = join(tmpdir(), 'baz.js');
writeFileSync(workerFile, 'module.exports.fn = (obj) => [obj];');
});
let worker!: Worker;
beforeEach(() => {
worker = new Worker(workerFile, {
enableWorkerThreads: false,
exposedMethods: ['fn'],
});
});
afterEach(async () => {
await worker.end();
});
it('does not retain result after next task call', async () => {
let leakDetector!: LeakDetector;
await new Promise((resolve, reject) => {
const obj = {};
(worker as any)
.fn(obj)
.then((result: unknown) => {
leakDetector = new LeakDetector(result);
return result;
})
.then(resolve, reject);
});
await new Promise((resolve, reject) => {
const obj = {};
(worker as any).fn(obj).then(resolve, reject);
});
expect(await leakDetector.isLeaking()).toBe(false);
});
});