jest.config.js

module.exports = {
  collectCoverageFrom: [
    'src/**/index.[tj]s?(x)',
    '!<rootDir>/src/index.[tj]s?(x)',
    '!<rootDir>/src/App.[tj]s?(x)',
    '!<rootDir>/src/**/*stories.[tj]s?(x)',
    '!<rootDir>/node_modules/',
    '!<rootDir>/path/to/dir/',
  ],
  moduleDirectories: ['node_modules', 'src/components', 'src/style'],
  moduleFileExtensions: ['js', 'jsx', 'ts', 'tsx'],
  moduleNameMapper: {
    '\\.(jpg|jpeg|png|gif|eot|otf|webp|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$':
      '<rootDir>/__mocks__/fileMock.js',
    '\\.(css|scss)$': '<rootDir>/src/main.scss',
    '\\.svg$': '<rootDir>/svgTransform.js',
  },
  modulePaths: ['<rootDir>/src/scripts/atoms'],
  setupFilesAfterEnv: ['<rootDir>/src/setupTests.ts'],
  testMatch: ['**/*.test.[tj]s?(x)'],
  transform: {
    '^.+\\.jsx?$': 'babel-jest',
    '^.+\\.tsx?$': 'ts-jest',
  },
  transformIgnorePatterns: ['<rootDir>/node_modules/'],
  testEnvironment: 'jsdom',
}