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chore: add test that unreffed workers are not reported (#12798)
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SimenB authored May 3, 2022
1 parent 585854f commit 277f7e4
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14 changes: 14 additions & 0 deletions e2e/__tests__/detectOpenHandles.ts
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* LICENSE file in the root directory of this source tree.
*/

import {onNodeVersions} from '@jest/test-utils';
import runJest, {runContinuous} from '../runJest';

function getTextAfterTest(stderr: string) {
Expand Down Expand Up @@ -119,6 +120,19 @@ it('does not report child_process using unref', () => {
expect(textAfterTest).toBe('');
});

onNodeVersions('>=18.1.0', () => {
it('does not report worker using unref', () => {
// The test here is basically that it exits cleanly without reporting anything (does not need `until`)
const {stderr} = runJest('detect-open-handles', [
'worker',
'--detectOpenHandles',
]);
const textAfterTest = getTextAfterTest(stderr);

expect(textAfterTest).toBe('');
});
});

it('prints out info about open handlers from inside tests', async () => {
const run = runContinuous('detect-open-handles', [
'inside',
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17 changes: 17 additions & 0 deletions e2e/detect-open-handles/__tests__/worker.js
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@@ -0,0 +1,17 @@
/**
* 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.
*/

const {Worker} = require('worker_threads');

test('something', () => {
const worker = new Worker(require.resolve('../interval-code'), {
stderr: true,
stdout: true,
});
worker.unref();
expect(true).toBe(true);
});

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