blog/jest.config.js

module.exports = {
  transform: {
    '^.+\\.(tsx?|jsx?)$': 'ts-jest',
    '^.+\\.jsx?$': '<rootDir>/jest/jest-preprocess.js'
  },
  testRegex: '(/__tests__/.*|\\.(test|spec))\\.(ts|tsx)$',

  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>/jest/__mocks__/file-mock.ts',
    '\\.svg': '<rootDir>/jest/__mocks__/svgr-mock.ts'
  },
  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node'],
  testPathIgnorePatterns: ['node_modules', '.cache', 'public', 'coverage'],
  transformIgnorePatterns: ['node_modules/(?!(gatsby)/)'],
  globals: {
    __PATH_PREFIX__: ''
  },
  testURL: 'http://localhost',
  setupFiles: ['<rootDir>/jest/loadershim.js'],
  setupFilesAfterEnv: ['<rootDir>/jest/setup-test-env.ts'],
  collectCoverageFrom: ['src/**/*.{ts,tsx}', '!src/@types/**/*']
}