jest.config.mjs

import nextJest from 'next/jest.js';

const createJestConfig = nextJest({
  // Provide the path to your Next.js app to load next.config.js and .env files
  dir: './',
});

// Add any custom config to be passed to Jest
const customJestConfig = {
  setupFilesAfterEnv: ['<rootDir>/jest.setup.mjs'],
  testEnvironment: 'jsdom',
  moduleNameMapper: {
    '^~/(.*)$': '<rootDir>/app/$1',
  },
  testMatch: ['**/__tests__/**/*.(ts|tsx|js)', '**/*.(test|spec).(ts|tsx|js)'],
  testPathIgnorePatterns: ['<rootDir>/tests/e2e/'],
  collectCoverageFrom: ['app/**/*.{ts,tsx}', '!app/**/*.d.ts', '!app/**/*.spec.{ts,tsx}', '!app/**/*.test.{ts,tsx}'],
  transform: {
    '^.+\\.(ts|tsx)$': [
      'ts-jest',
      {
        tsconfig: 'tsconfig.json',
        useESM: true,
      },
    ],
  },
  transformIgnorePatterns: [
    'node_modules/(?!(react-markdown|chalk|@ai-sdk|eventsource-parser|react-markdown|remark-.*|rehype-.*|unified|unist-.*|mdast-.*|micromark|decode-named-character-reference|character-entities|property-information|hast-util-.*|space-separated-tokens|comma-separated-tokens|remark-parse|remark-stringify|remark-rehype|rehype-stringify|rehype-parse|rehype-raw|rehype-sanitize|rehype-remark|unist-util-.*|mdast-util-.*|micromark-.*|decode-named-character-reference|character-entities|property-information|hast-util-.*|space-separated-tokens|comma-separated-tokens|react-markdown|remark-gfm|rehype-raw|rehype-sanitize|unified|unist-util-visit|mdast-util-.*|micromark-.*|decode-named-character-reference|character-entities|property-information|hast-util-.*|space-separated-tokens|comma-separated-tokens)/)',
  ],
  extensionsToTreatAsEsm: ['.ts', '.tsx'],
  globals: {
    'ts-jest': {
      useESM: true,
    },
  },
  testEnvironmentOptions: {
    customExportConditions: [''],
  },
  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json'],
  preset: 'ts-jest/presets/default-esm',
};

// createJestConfig is exported this way to ensure that next/jest can load the Next.js config which is async
export default createJestConfig(customJestConfig);