@sabertazimi/react-scripts/scripts/utils/createJestConfig.js

Configuration and scripts for Bod CLI.

// @remove-file-on-eject
/**
 * Copyright (c) 2015-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

const fs = require('node:fs')
const chalk = require('react-dev-utils/chalk')
const paths = require('../../config/paths')
const modules = require('../../config/modules')

module.exports = (resolve, rootDir, isEjecting) => {
  // Use this instead of `paths.testsSetup` to avoid putting
  // an absolute filename into configuration after ejecting.
  const setupTestsMatches = paths.testsSetup.match(/src[/\\]setupTests\.(.+)/)
  const setupTestsFileExtension =
    (setupTestsMatches && setupTestsMatches[1]) || 'js'
  const setupTestsFile = fs.existsSync(paths.testsSetup)
    ? `<rootDir>/src/setupTests.${setupTestsFileExtension}`
    : undefined

  const config = {
    roots: ['<rootDir>/src'],

    collectCoverageFrom: ['src/**/*.{js,jsx,ts,tsx}', '!src/**/*.d.ts'],

    setupFiles: [
      isEjecting
        ? 'react-app-polyfill/jsdom'
        : require.resolve('react-app-polyfill/jsdom'),
    ],

    setupFilesAfterEnv: setupTestsFile ? [setupTestsFile] : [],
    testMatch: [
      '<rootDir>/src/**/__tests__/**/*.{js,jsx,ts,tsx}',
      '<rootDir>/src/**/*.{spec,test}.{js,jsx,ts,tsx}',
    ],
    testEnvironment: 'jsdom',
    transform: {
      '^.+\\.(js|jsx|mjs|cjs|ts|tsx)$': resolve(
        'config/jest/babelTransform.js'
      ),
      '^.+\\.css$': resolve('config/jest/cssTransform.js'),
      '^(?!.*\\.(js|jsx|mjs|cjs|ts|tsx|css|json)$)': resolve(
        'config/jest/fileTransform.js'
      ),
    },
    transformIgnorePatterns: [
      '[/\\\\]node_modules[/\\\\].+\\.(js|jsx|mjs|cjs|ts|tsx)$',
      '^.+\\.module\\.(css|sass|scss)$',
    ],
    modulePaths: modules.additionalModulePaths || [],
    moduleNameMapper: {
      '^react-native$': 'react-native-web',
      '^.+\\.module\\.(css|sass|scss)$': 'identity-obj-proxy',
      '\\.svg$': resolve('config/jest/svgMock.js'),
      ...(modules.jestAliases || {}),
    },
    moduleFileExtensions: [...paths.moduleFileExtensions, 'node'].filter(
      ext => !ext.includes('mjs')
    ),
    watchPlugins: [
      'jest-watch-typeahead/filename',
      'jest-watch-typeahead/testname',
    ],
    resetMocks: true,
  }
  if (rootDir) {
    config.rootDir = rootDir
  }
  const overrides = Object.assign({}, require(paths.appPackageJson).jest)
  const supportedKeys = [
    'clearMocks',
    'collectCoverageFrom',
    'coveragePathIgnorePatterns',
    'coverageReporters',
    'coverageThreshold',
    'displayName',
    'extraGlobals',
    'globalSetup',
    'globalTeardown',
    'moduleNameMapper',
    'resetMocks',
    'resetModules',
    'restoreMocks',
    'snapshotSerializers',
    'testMatch',
    'transform',
    'transformIgnorePatterns',
    'watchPathIgnorePatterns',
  ]
  if (overrides) {
    supportedKeys.forEach(key => {
      if (Object.prototype.hasOwnProperty.call(overrides, key)) {
        if (Array.isArray(config[key]) || typeof config[key] !== 'object') {
          // for arrays or primitive types, directly override the config key
          config[key] = overrides[key]
        } else {
          // for object types, extend gracefully
          config[key] = Object.assign({}, config[key], overrides[key])
        }

        delete overrides[key]
      }
    })
    const unsupportedKeys = Object.keys(overrides)
    if (unsupportedKeys.length) {
      const isOverridingSetupFile =
        unsupportedKeys.includes('setupFilesAfterEnv')

      if (isOverridingSetupFile) {
        console.error(
          chalk.red(
            `We detected ${chalk.bold(
              'setupFilesAfterEnv'
            )} in your package.json.\n\n` +
              `Remove it from Jest configuration, and put the initialization code in ${chalk.bold(
                'src/setupTests.js'
              )}.\nThis file will be loaded automatically.\n`
          )
        )
      } else {
        console.error(
          chalk.red(
            `\nOut of the box, Create React App only supports overriding ` +
              `these Jest options:\n\n${supportedKeys
                .map(key => chalk.bold(`  \u2022 ${key}`))
                .join('\n')}.\n\n` +
              `These options in your package.json Jest configuration ` +
              `are not currently supported by Create React App:\n\n${unsupportedKeys
                .map(key => chalk.bold(`  \u2022 ${key}`))
                .join(
                  '\n'
                )}\n\nIf you wish to override other Jest options, you need to ` +
              `eject from the default setup. You can do so by running ${chalk.bold(
                'npm run eject'
              )} but remember that this is a one-way operation. ` +
              `You may also file an issue with Create React App to discuss ` +
              `supporting more options out of the box.\n`
          )
        )
      }

      process.exit(1)
    }
  }
  return config
}