jest.config.js

const { compilerOptions } = require("./tsconfig.json");
const { pathsToModuleNameMapper } = require("ts-jest");
const paths = pathsToModuleNameMapper(compilerOptions.paths, {
  prefix: "<rootDir>/",
});

module.exports = {
  transform: {
    "^.+\\.[tj]sx?$": `<rootDir>/jest-preprocess.js`,
  },
  moduleNameMapper: {
    ".+\\.(css|styl|less|sass|scss)$": `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`,
    ...paths,
  },
  testPathIgnorePatterns: [`node_modules`, `\\.cache`, `<rootDir>.*/public`],
  transformIgnorePatterns: [
    `node_modules/(?!(@mdx-js|gatsby|gatsby-script|gatsby-link)/)`,
  ],
  globals: {
    __PATH_PREFIX__: ``,
  },
  testEnvironment: `jsdom`,
  testEnvironmentOptions: {
    url: `http://localhost`,
  },
  setupFiles: [`<rootDir>/loadershim.js`],
  setupFilesAfterEnv: ["<rootDir>/setup-test-env.js"],
};