jest.config.js

module.exports = {
  transform: {
    "^.+\\.jsx?$": `<rootDir>/jest-preprocess.js`,
    "^.+\\.ya?ml$": "yaml-jest",
  },
  moduleFileExtensions: ["js", "jsx", "ts", "tsx", "yml", "yaml"],
  moduleNameMapper: {
    ".+\\.(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`,
    "typeface-open-sans": "identity-obj-proxy",
    "^gatsby-core-utils/(.*)$": `gatsby-core-utils/$1`, // Workaround for https://github.com/facebook/jest/issues/9771,
    "^gatsby-page-utils/(.*)$": "gatsby-page-utils/$1", // Workaround for https://github.com/facebook/jest/issues/9771
    "^gatsby-plugin-utils/(.*)$": [
      `gatsby-plugin-utils/dist/$1`,
      `gatsby-plugin-utils/$1`,
    ], // Workaround for https://github.com/facebook/jest/issues/9771
  },
  testPathIgnorePatterns: [`node_modules`, `\\.cache`, `<rootDir>.*/public`],
  // Add ESM dependencies into the group in this pattern
  transformIgnorePatterns: [
    `<rootDir>/node_modules/(?!(rehype-react|url-exist|is-url-superb|ky-universal|ky|gatsby)/)`,
  ],
  globals: {
    __PATH_PREFIX__: ``,
  },
  testEnvironmentOptions: { url: `http://localhost` },
  setupFiles: [`<rootDir>/loadershim.js`],
  setupFilesAfterEnv: ["<rootDir>/jest-setup.js"],
  testEnvironment: `jsdom`,
  resolver: undefined,
}