portfolio/tests/jest.config.js

module.exports = {
  rootDir: '../',
  transform: {
    '^.+\\.[jt]sx?$': ['babel-jest', { configFile: './tests/babel.config.js' }]
  },
  moduleNameMapper: {
    '.+\\.(css|styl|less|sass|scss)$': 'identity-obj-proxy',
    '.+\\.(jpg|jpeg|png|gif|eot|otf|webp|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$':
      '<rootDir>/tests/__mocks__/file-mock.js',
    '\\.svg': '<rootDir>/tests/__mocks__/svgr-mock.js',
    '^@reach/router(.*)': '<rootDir>/node_modules/@gatsbyjs/reach-router$1'
  },
  testPathIgnorePatterns: [
    'node_modules',
    '\\.cache',
    '<rootDir>.*/public',
    'coverage'
  ],
  transformIgnorePatterns: [
    'node_modules/(?!(gatsby|gatsby-script|gatsby-link)/)'
  ],
  globals: {
    __PATH_PREFIX__: ''
  },
  setupFiles: ['<rootDir>/tests/loadershim.js'],
  setupFilesAfterEnv: ['<rootDir>/tests/setup-test-env.js'],
  testEnvironment: 'jsdom'
}