jest.config.js

module.exports = {
    transform: {
      "^.+\\.jsx?$": `<rootDir>/jest-preprocess.js`,
    },
    moduleNameMapper: {
      ".+\\.(css|styl|less|sass|scss)$": `identity-obj-proxy`,
      ".+\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$": `<rootDir>/__mocks__/file-mock.js`,
      // "^gatsby-page-utils/(.*)$": `gatsby-page-utils/dist/$1`, // Workaround for https://github.com/facebook/jest/issues/9771
      // "^gatsby-core-utils/(.*)$": `gatsby-core-utils/dist/$1`, // Workaround for https://github.com/facebook/jest/issues/9771
      // "^gatsby-plugin-utils/(.*)$": [
      //   `gatsby-plugin-utils/dist/$1`,
      //   `gatsby-plugin-utils/$1`,
      // ], // Workaround for https://github.com/facebook/jest/issues/9771
    },
    testPathIgnorePatterns: [`node_modules`, `\\.cache`, `<rootDir>.*/public`],
    transformIgnorePatterns: [`node_modules/(?!(gatsby|gatsby-script|gatsby-link)/)`],
    globals: {
      __PATH_PREFIX__: ``,
    },
    testEnvironmentOptions: {
      url: `http://localhost`,
    },
    setupFiles: [`<rootDir>/loadershim.js`],
  }