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How to use invalidSetupWithNamedExport method in Jest

Best JavaScript code snippet using jest

globalSetup.test.js

Source:globalSetup.test.js

1/**2 * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.3 *4 * This source code is licensed under the MIT license found in the5 * LICENSE file in the root directory of this source tree.6 * @flow7 */8'use strict';9import fs from 'fs';10import os from 'os';11import path from 'path';12import runJest, {json as runWithJson} from '../runJest';13import {cleanup} from '../Utils';14const DIR = path.join(os.tmpdir(), 'jest-global-setup');15const project1DIR = path.join(os.tmpdir(), 'jest-global-setup-project-1');16const project2DIR = path.join(os.tmpdir(), 'jest-global-setup-project-2');17const customTransformDIR = path.join(18  os.tmpdir(),19  'jest-global-setup-custom-transform',20);21beforeEach(() => {22  cleanup(DIR);23  cleanup(project1DIR);24  cleanup(project2DIR);25  cleanup(customTransformDIR);26});27afterAll(() => {28  cleanup(DIR);29  cleanup(project1DIR);30  cleanup(project2DIR);31  cleanup(customTransformDIR);32});33test('globalSetup is triggered once before all test suites', () => {34  const setupPath = path.resolve(__dirname, '../global-setup/setup.js');35  const result = runWithJson('global-setup', [36    `--globalSetup=${setupPath}`,37    `--testPathPattern=__tests__`,38  ]);39  expect(result.status).toBe(0);40  const files = fs.readdirSync(DIR);41  expect(files).toHaveLength(1);42  const setup = fs.readFileSync(path.join(DIR, files[0]), 'utf8');43  expect(setup).toBe('setup');44});45test('jest throws an error when globalSetup does not export a function', () => {46  const setupPath = path.resolve(__dirname, '../global-setup/invalidSetup.js');47  const {status, stderr} = runJest('global-setup', [48    `--globalSetup=${setupPath}`,49    `--testPathPattern=__tests__`,50  ]);51  expect(status).toBe(1);52  expect(stderr).toMatch(53    `TypeError: globalSetup file must export a function at ${setupPath}`,54  );55});56test('globalSetup function gets jest config object as a parameter', () => {57  const setupPath = path.resolve(58    __dirname,59    '../global-setup/setupWithConfig.js',60  );61  const testPathPattern = 'pass';62  const result = runJest('global-setup', [63    `--globalSetup=${setupPath}`,64    `--testPathPattern=${testPathPattern}`,65  ]);66  expect(result.stdout).toBe(testPathPattern);67});68test('should call globalSetup function of multiple projects', () => {69  const configPath = path.resolve(70    __dirname,71    '../global-setup/projects.jest.config.js',72  );73  const result = runWithJson('global-setup', [`--config=${configPath}`]);74  expect(result.status).toBe(0);75  expect(fs.existsSync(DIR)).toBe(true);76  expect(fs.existsSync(project1DIR)).toBe(true);77  expect(fs.existsSync(project2DIR)).toBe(true);78});79test('should not call a globalSetup of a project if there are no tests to run from this project', () => {80  const configPath = path.resolve(81    __dirname,82    '../global-setup/projects.jest.config.js',83  );84  const result = runWithJson('global-setup', [85    `--config=${configPath}`,86    '--testPathPattern=project-1',87  ]);88  expect(result.status).toBe(0);89  expect(fs.existsSync(DIR)).toBe(true);90  expect(fs.existsSync(project1DIR)).toBe(true);91  expect(fs.existsSync(project2DIR)).toBe(false);92});93test('should not call any globalSetup if there are no tests to run', () => {94  const configPath = path.resolve(95    __dirname,96    '../global-setup/projects.jest.config.js',97  );98  const result = runWithJson('global-setup', [99    `--config=${configPath}`,100    // onlyChanged ensures there are no tests to run101    '--onlyChanged',102  ]);103  expect(result.status).toBe(0);104  expect(fs.existsSync(DIR)).toBe(false);105  expect(fs.existsSync(project1DIR)).toBe(false);106  expect(fs.existsSync(project2DIR)).toBe(false);107});108test('globalSetup works with default export', () => {109  const setupPath = path.resolve(110    __dirname,111    '../global-setup/setupWithDefaultExport.js',112  );113  const testPathPattern = 'pass';114  const result = runJest('global-setup', [115    `--globalSetup=${setupPath}`,116    `--testPathPattern=${testPathPattern}`,117  ]);118  expect(result.stdout).toBe(testPathPattern);119});120test('globalSetup throws with named export', () => {121  const setupPath = path.resolve(122    __dirname,123    '../global-setup/invalidSetupWithNamedExport.js',124  );125  const {status, stderr} = runJest('global-setup', [126    `--globalSetup=${setupPath}`,127    `--testPathPattern=__tests__`,128  ]);129  expect(status).toBe(1);130  expect(stderr).toMatch(131    `TypeError: globalSetup file must export a function at ${setupPath}`,132  );133});134test('should not transpile the transformer', () => {135  const {status} = runJest('global-setup-custom-transform', [`--no-cache`]);136  expect(status).toBe(0);...

invalidSetupWithNamedExport.js

Source:invalidSetupWithNamedExport.js

...3 *4 * This source code is licensed under the MIT license found in the5 * LICENSE file in the root directory of this source tree.6 */7function invalidSetupWithNamedExport(jestConfig): void {8  console.log(jestConfig.testPathPattern);9}...

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