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jest.config.js.test.ts
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jest.config.js.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 * as path from 'path';
import {wrap} from 'jest-snapshot-serializer-raw';
import runJest from '../runJest';
import {cleanup, extractSummary, writeFiles} from '../Utils';
const DIR = path.resolve(__dirname, '../jest-config-js');
beforeEach(() => cleanup(DIR));
afterAll(() => cleanup(DIR));
test('works with jest.config.js', () => {
writeFiles(DIR, {
'__tests__/a-banana.js': `test('banana', () => expect(1).toBe(1));`,
'jest.config.js': `module.exports = {testRegex: '.*-banana.js'};`,
'package.json': '{}',
});
const {stderr, exitCode} = runJest(DIR, ['-w=1', '--ci=false']);
const {rest, summary} = extractSummary(stderr);
expect(exitCode).toBe(0);
expect(wrap(rest)).toMatchSnapshot();
expect(wrap(summary)).toMatchSnapshot();
});
test('traverses directory tree up until it finds jest.config', () => {
writeFiles(DIR, {
'__tests__/a-banana.js': `
const slash = require('slash');
test('banana', () => expect(1).toBe(1));
test('abc', () => console.log(slash(process.cwd())));
`,
'jest.config.js': `module.exports = {testRegex: '.*-banana.js'};`,
'package.json': '{}',
'some/nested/directory/file.js': '// nothing special',
});
const {stderr, exitCode, stdout} = runJest(
path.join(DIR, 'some', 'nested', 'directory'),
['-w=1', '--ci=false'],
{skipPkgJsonCheck: true},
);
// Snapshot the console.loged `process.cwd()` and make sure it stays the same
expect(
wrap(stdout.replace(/^\W+(.*)e2e/gm, '<<REPLACED>>')),
).toMatchSnapshot();
const {rest, summary} = extractSummary(stderr);
expect(exitCode).toBe(0);
expect(wrap(rest)).toMatchSnapshot();
expect(wrap(summary)).toMatchSnapshot();
});
test('invalid JS in jest.config.js', () => {
writeFiles(DIR, {
'__tests__/a-banana.js': `test('banana', () => expect(1).toBe(1));`,
'jest.config.js': `module.exports = i'll break this file yo`,
'package.json': '{}',
});
const {stderr, exitCode} = runJest(DIR, ['-w=1', '--ci=false']);
expect(stderr).toMatch('SyntaxError: ');
expect(exitCode).toBe(1);
});