forked from jestjs/jest
/
workerForceExit.test.ts
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/
workerForceExit.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 {resolve} from 'path';
import findProcess = require('find-process');
import {
cleanup,
generateTestFilesToForceUsingWorkers,
writeFiles,
} from '../Utils';
import runJest from '../runJest';
// These tests appear to be slow/flakey on Windows
jest.retryTimes(10);
const DIR = resolve(tmpdir(), 'worker-force-exit');
beforeEach(() => cleanup(DIR));
afterEach(() => cleanup(DIR));
const testFiles = {
...generateTestFilesToForceUsingWorkers(),
'package.json': `{
"testEnvironment": "node"
}`,
};
const verifyNumPassed = (stderr: string) => {
const numberOfTestsPassed = (stderr.match(/\bPASS\b/g) || []).length;
// assuming -1 because of package.json, but +1 because of the individual test file
expect(numberOfTestsPassed).toBe(Object.keys(testFiles).length);
};
test('prints a warning if a worker is force exited', () => {
writeFiles(DIR, {
...testFiles,
'__tests__/simple.test.js': `
test('t', () => {
require('http').createServer().listen(0);
});
`,
});
const {exitCode, stderr} = runJest(DIR, ['--maxWorkers=2']);
expect(exitCode).toBe(0);
verifyNumPassed(stderr);
expect(stderr).toContain('A worker process has failed to exit gracefully');
});
test('force exits a worker that fails to exit gracefully', async () => {
writeFiles(DIR, {
...testFiles,
'__tests__/timeoutKilled.test.js': `
test('t', () => {
require('http').createServer().listen(0);
console.error('pid: ' + process.pid);
});
`,
});
const {exitCode, stderr} = runJest(DIR, ['--maxWorkers=2']);
expect(exitCode).toBe(0);
verifyNumPassed(stderr);
const execRes = /pid: (\d+)/.exec(stderr);
expect(execRes).toHaveLength(2);
const [, pid] = execRes!;
const pidNumber = Number(pid);
expect(pidNumber).not.toBeNaN();
expect(await findProcess('pid', pidNumber)).toHaveLength(0);
}, 15000);