{
  "extends": "./jest-shared.config.json",

  "testEnvironment": "jest-environment-jsdom",

  "testEnvironmentOptions": {
    "url": "http://localhost/",

    // For web projects, we write ESM output (with "import" statements") into the "lib" folder
    // to be processed by Webpack or other tree-shaking bundlers.
    // We also write CommonJS output (with "require()" calls") into the "lib-commonjs" folder
    // to be processed by Jest.  We do this because the Jest requires the --experimental-vm-modules flag
    // in order to load ESM, and also because the interop story between CommonJS and ESM in NodeJs is
    // very finicky.
    //
    // The jest-environment-jsdom package now sets "customExportConditions" to ["browser"],
    // which often selects an ESM entry point when resolving packages. This is incorrect for
    // our setup.  The setting below fixes that.  For details, refer to these docs:
    // https://nodejs.org/api/packages.html#conditional-exports
    "customExportConditions": ["require", "node", "umd"]
  },

  // For web projects, `lib/` is normally ESM, so we route to the CommonJS output in `lib-commonjs/` instead.
  "roots": ["<rootDir>/lib-commonjs"],

  "testMatch": ["<rootDir>/lib-commonjs/**/*.test.js"],

  "collectCoverageFrom": [
    "lib-commonjs/**/*.js",
    "!lib-commonjs/**/*.d.ts",
    "!lib-commonjs/**/*.test.js",
    "!lib-commonjs/**/test/**",
    "!lib-commonjs/**/__tests__/**",
    "!lib-commonjs/**/__fixtures__/**",
    "!lib-commonjs/**/__mocks__/**"
  ]
}