jest.config.js

/** @type {import('jest').Config} */
const nextJest = require('next/jest')

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.js'],
  testEnvironment: 'jsdom',
  testPathIgnorePatterns: [
    '<rootDir>/.next/',
    '<rootDir>/node_modules/',
    '<rootDir>/out/',
  ],
  collectCoverageFrom: [
    'src/**/*.{js,jsx,ts,tsx}',
    '!src/**/*.d.ts',
    '!src/**/*.stories.{js,jsx,ts,tsx}',
  ],
  moduleNameMapper: {
    '^@/(.*)$': '<rootDir>/src/$1',
  },
  testMatch: [
    '**/__tests__/**/*.(test|spec).(js|jsx|ts|tsx)',
    '**/?(*.)(test|spec).(js|jsx|ts|tsx)',
  ],
  transformIgnorePatterns: [
    'node_modules/(?!(react-syntax-highlighter|refractor)/)',
  ],
  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json'],
  extensionsToTreatAsEsm: ['.ts', '.tsx'],
}

// createJestConfig is exported this way to ensure that next/jest can load the Next.js config which is async
module.exports = createJestConfig(customJestConfig)