jest.config.js

module.exports = {
  collectCoverageFrom: ['**/*.{js,jsx,ts,tsx}', '!**/*.d.ts'],
  setupFiles: ['react-app-polyfill/jsdom'],
  testMatch: [
    '<rootDir>/**/__tests__/**/*.{js,jsx,ts,tsx}',
    '<rootDir>/**/__tests__/**/*.{spec,test}.{js,jsx,ts,tsx}',
  ],
  testEnvironment: 'jest-environment-jsdom-fourteen',
  transform: {
    '^.+\\.[tj]sx?$': 'ts-jest',
  },
  transformIgnorePatterns: [
    '[/\\\\]node_modules[/\\\\].+\\.(js|jsx|ts|tsx)$',
    '^.+\\.module\\.(css|sass|scss)$',
  ],
  moduleNameMapper: {
    '^.+\\.module\\.(css|sass|scss)$': 'identity-obj-proxy',
  },
  moduleFileExtensions: [
    'web.js',
    'js',
    'web.ts',
    'ts',
    'web.tsx',
    'tsx',
    'json',
    'web.jsx',
    'jsx',
    'node',
  ],
  watchPlugins: [
    'jest-watch-typeahead/filename',
    'jest-watch-typeahead/testname',
  ],
  globals: {
    'ts-jest': {
      tsConfig: 'tsconfig.jest.json',
      isolatedModules: true,
    },
  },
}