jest.config.js

module.exports = {
  transform: {
    '^.+\\.tsx?$': 'ts-jest',
  },
  verbose: true,
  setupFiles: ['<rootDir>/src/tests/__mocks__/browserMocks.js'],
  testEnvironmentOptions: {
    url: 'http://localhost:8080',
  },
  moduleFileExtensions: ['js', 'jsx', 'ts', 'tsx'],
  moduleDirectories: ['node_modules'],
  testMatch: ['**/__tests__/**/*.[jt]s?(x)', '**/?(*.)(spec|test).[jt]s?(x)'],
  testEnvironment: 'jsdom',
  moduleNameMapper: {
    '\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$':
      '<rootDir>/src/tests/__mocks__/fileMock.js',
    '\\.(css|less|scss)$': 'identity-obj-proxy',
    '^./style$': 'identity-obj-proxy',
    '^preact$': '<rootDir>/node_modules/preact/dist/preact.min.js',
    '^preact/test-utils$':
      '<rootDir>/node_modules/preact/test-utils/dist/testUtils.umd.js',
    '^preact/hooks$': '<rootDir>/node_modules/preact/hooks/dist/hooks.umd.js',
    '^preact-router$':
      '<rootDir>/node_modules/preact-router/dist/preact-router.umd.js',
    '^react$': 'preact-compat',
    '^react-dom$': 'preact-compat',
    '^create-react-class$': 'preact-compat/lib/create-react-class',
    '^react-addons-css-transition-group$': 'preact-css-transition-group',
    '^@testing-library/preact$':
      '<rootDir>/node_modules/@testing-library/preact/dist/cjs/index.js',
  },
  globals: {
    'ts-jest': {
      tsconfig: 'tsconfig.test.json',
    },
  },
};