jest.config.js

module.exports = {
  globals: {
    __PATH_PREFIX__: ''
  },
  moduleFileExtensions: ['js', 'json', 'jsx', 'node', 'ts', 'tsx'],
  moduleNameMapper: {
    '^@/(.*)$': '<rootDir>/src/$1',
    '.+\\.(css|styl|less|sass|scss)$': 'identity-obj-proxy',
    '.+\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$':
      '<rootDir>/__mocks__/file-mock.js',
    '^gatsby-plugin-utils/(.*)$': [
      'gatsby-plugin-utils/dist/$1',
      'gatsby-plugin-utils/$1'
    ],
    '^gatsby-page-utils/(.*)$': 'gatsby-page-utils/$1' // Workaround for https://github.com/facebook/jest/issues/9771
  },
  preset: 'ts-jest',
  testEnvironment: 'jsdom',
  testPathIgnorePatterns: ['node_modules', '\\.cache', '<rootDir>.*/public'],
  testRegex: '(/__tests__/.*|(\\.|/)(test|spec))\\.(jsx?|tsx?)$',
  transform: {
    '^.+\\.tsx?$': 'ts-jest',
    '^.+\\.jsx?$': 'babel-jest'
  },
  transformIgnorePatterns: ['<rootDir>/node_modules/'],
  setupFiles: ['<rootDir>/__mocks__/setup-mocks.ts'],
  snapshotSerializers: ['@emotion/jest/serializer'],
  verbose: true
};