jest.config.js

/**
 * Copyright (c) Microsoft Corporation.
 * Licensed under the MIT License.
 *
 * @format
 * @ts-check
 */

// For a detailed explanation regarding each configuration property, visit:
// https://jestjs.io/docs/en/configuration.html

const assetTransform = 'react-native-windows/jest/assetFileTransformer.js';

module.exports = {
  preset: '@rnx-kit/jest-preset',

  // A list of paths to directories that Jest should use to search for files in
  roots: ['<rootDir>/test/'],

  // The test environment that will be used for testing
  testEnvironment: '@react-native-windows/automation',

  // The pattern or patterns Jest uses to detect test files
  testRegex: '.*\\.test\\.ts$',

  // Default timeout of a test in milliseconds
  testTimeout: 70000,

  // A map from regular expressions to paths to transformers
  transform: {
    '\\.(bmp|gif|jpg|jpeg|mp4|png|psd|svg|webp)$': assetTransform,
    'node_modules\\\\@?react-native\\\\.*': 'babel-jest',
    '@react-native-windows\\\\tester\\\\.*': 'babel-jest',
    'vnext\\\\.*': 'babel-jest',
    '\\.[jt]sx?$': 'babel-jest',
  },

  snapshotResolver: 'react-native-windows/jest-snapshot-resolver.js',

  // An array of regexp pattern strings that are matched against all source file paths before transformation.
  // If the file path matches any of the patterns, it will not be transformed.
  transformIgnorePatterns: ['jest-runner'],

  // Specifies the maximum number of workers the worker-pool will spawn for running tests.
  maxWorkers: 1,

  // Indicates whether each individual test should be reported during the run.
  verbose: true,

  // A list of paths to modules that run some code to configure or set up the testing framework
  // before each test file in the suite is executed
  setupFilesAfterEnv: ['react-native-windows/jest/setup', './jest.setup.js'],

  testEnvironmentOptions: {
    app: 'RNTesterApp',
    enableAutomationChannel: true,
  },
};