jest.config.js

module.exports = {
  roots: ['<rootDir>/src'],
  testEnvironment: 'jsdom',
  testRunner: '<rootDir>/node_modules/jest-circus/runner.js',
  collectCoverageFrom: ['src/**/*.{js,jsx,mjs,ts,tsx}', '!src/**/*.d.ts'],
  coveragePathIgnorePatterns: [
    '/node_modules/',
    '<rootDir>/src/registerServiceWorker.ts',
    '<rootDir>/src/react-app-env.d.ts',
    '<rootDir>/src/window.d.ts',
  ],
  setupFiles: ['react-app-polyfill/jsdom'],
  setupFilesAfterEnv: ['<rootDir>/scripts/js/setupTests.ts'],
  testMatch: [
    '<rootDir>/src/**/?(*.)(spec|test).{js,jsx,mjs}',
    '<rootDir>/__tests__/**/*.{js,ts,tsx,jsx,mjs}',
    '<rootDir>/src/**/__tests__/**/*.{js,jsx,ts,tsx}',
    '<rootDir>/?(*.)(spec|test).{js,jsx,ts,tsx,mjs}',
    '<rootDir>/src/**/*.{spec,test}.{js,jsx,ts,tsx}',
    '<rootDir>/src/**/__tests__/**/*.{js,ts,tsx,jsx,mjs}',
    '<rootDir>/src/**/?(*.)(spec|test).{js,ts,tsx,jsx,mjs}',
    '<rootDir>/src/**/__tests__/**/*.{js,jsx,ts,tsx}',
    '<rootDir>/src/**/*.{spec,test}.{js,jsx,ts,tsx}',
  ],
  testURL: 'http://localhost',
  transform: {
    '^(?!.*\\.(js|jsx|mjs|css|json)$)': '<rootDir>/config/jest/fileTransform.js',
    '^.+\\.(js|jsx|mjs|cjs|ts|tsx)$': '<rootDir>/config/jest/babelTransform.js',
    '^.+\\.css$': '<rootDir>/config/jest/cssTransform.js',
    '^(?!.*\\.(js|jsx|mjs|cjs|ts|tsx|css|json)$)': '<rootDir>/config/jest/fileTransform.js',
  },
  transformIgnorePatterns: [
    '[/\\\\]node_modules[/\\\\].+\\.(js|jsx|mjs|cjs|ts|tsx)$',
    '^.+\\.module\\.(css|sass|scss)$',
  ],
  moduleNameMapper: {
    '^react-native$': 'react-native-web',
    '^.+\\.module\\.(css|sass|scss)$': 'identity-obj-proxy',
  },
  moduleFileExtensions: [
    'web.js',
    'web.ts',
    'js',
    'ts',
    'json',
    'web.jsx',
    'web.tsx',
    'jsx',
    'tsx',
    'node',
    'mjs',
  ],
  watchPlugins: ['jest-watch-typeahead/filename', 'jest-watch-typeahead/testname'],
  resetMocks: true,
};