repo_description: The React Framework
repo_topics: blog browser compiler components hybrid nextjs node react server-rendering ssg static static-site-generator universal vercel
code: const nextJest = require('next/jest')
  
  const createJestConfig = nextJest()
  
  // Any custom config you want to pass to Jest
  /** @type {import('jest').Config} */
  const customJestConfig = {
    displayName: process.env.IS_WEBPACK_TEST ? 'webpack' : 'Turbopack',
    testMatch: ['**/*.test.js', '**/*.test.ts', '**/*.test.jsx', '**/*.test.tsx'],
    globalSetup: '<rootDir>/jest-global-setup.ts',
    setupFilesAfterEnv: ['<rootDir>/jest-setup-after-env.ts'],
    verbose: true,
    rootDir: 'test',
    roots: [
      '<rootDir>',
      '<rootDir>/../packages/next/src/',
      '<rootDir>/../packages/next-codemod/',
      '<rootDir>/../packages/eslint-plugin-internal/',
      '<rootDir>/../packages/font/src/',
      '<rootDir>/../packages/next-routing/',
    ],
    haste: {
      // Throwing to avoid warnings creeping up over time polluting log output.
      throwOnModuleCollision: true,
    },
    modulePathIgnorePatterns: [
      '/\\.next/',
      // Prevents jest-haste-map warnings due to multiple versions of the same
      // package being vendored. Also means tests in `compiled` will be ignored.
      // Jest does not normalize/resolve paths in modulePathIgnorePatterns so we can't
      // prefix with <rootDir>/../ like we do in roots.
      'packages/next/src/compiled/',
      '<rootDir>/development/app-dir/ssr-in-rsc/internal-pkg/',
      '<rootDir>/e2e/app-dir/self-importing-package/internal-pkg',
      '<rootDir>/e2e/app-dir/self-importing-package-monorepo/internal-pkg',
      '<rootDir>/e2e/app-dir/server-source-maps/fixtures/default/internal-pkg',
      '<rootDir>/e2e/transpile-packages-typescript-foreign/pkg',
      '<rootDir>/production/standalone-mode/tracing-side-effects-false/foo',
      '<rootDir>/production/standalone-mode/tracing-static-files/foo',
      '<rootDir>/production/standalone-mode/tracing-unparsable/foo',
      '<rootDir>/production/supports-module-resolution-nodenext/pkg',
    ],
    modulePaths: ['<rootDir>/lib'],
    transformIgnorePatterns: ['/next[/\\\\]dist/', '/\\.next/'],
    moduleNameMapper: {
      '@next/font/(.*)': '@next/font/$1',
    },
  }
  
  // Check if the environment variable is set to enable test report,
  // Insert a reporter to generate a junit report to upload.
  //
  // This won't count retries to avoid tests being reported twice.
  // Our test report will report test results for flaky tests as failed without retry.
  const enableTestReport = !!process.env.NEXT_JUNIT_TEST_REPORT
  
  if (enableTestReport) {
    if (!customJestConfig.reporters) {
      customJestConfig.reporters = ['default']
    }
  
    let outputDirectory
    if (process.env.IS_TURBOPACK_TEST) {
      outputDirectory = '<rootDir>/turbopack-test-junit-report'
    } else if (process.env.NEXT_RSPACK) {
      outputDirectory = '<rootDir>/rspack-test-junit-report'
    } else {
      outputDirectory = '<rootDir>/test-junit-report'
    }
  
    customJestConfig.reporters.push([
      'jest-junit',
      {
        outputDirectory,
        reportTestSuiteErrors: 'true',
        uniqueOutputName: 'true',
        outputName: 'nextjs-test-junit',
        addFileAttribute: 'true',
      },
    ])
  }
  
  // createJestConfig is exported in this way to ensure that next/jest can load the Next.js config which is async
  module.exports = createJestConfig(customJestConfig)
  