jest.config.js

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: 'jest-environment-jsdom',
  testPathIgnorePatterns: [
    '<rootDir>/.next/',
    '<rootDir>/node_modules/',
    '<rootDir>/out/',
  ],
  moduleNameMapper: {
    '^@/components/(.*)$': '<rootDir>/components/$1',
    '^@/lib/(.*)$': '<rootDir>/lib/$1',
    '^@/hooks/(.*)$': '<rootDir>/hooks/$1',
    '^@/types/(.*)$': '<rootDir>/types/$1',
    '^@/app/(.*)$': '<rootDir>/app/$1',
  },
  collectCoverageFrom: [
    'components/**/*.{js,jsx,ts,tsx}',
    'lib/**/*.{js,jsx,ts,tsx}',
    'hooks/**/*.{js,jsx,ts,tsx}',
    'app/**/*.{js,jsx,ts,tsx}',
    '!**/*.d.ts',
    '!**/node_modules/**',
    '!**/.next/**',
  ],
  testMatch: [
    '<rootDir>/__tests__/**/*.(test|spec).{js,jsx,ts,tsx}',
    '<rootDir>/**/*.(test|spec).{js,jsx,ts,tsx}',
  ],
  transform: {
    '^.+\\.(js|jsx|ts|tsx)$': ['babel-jest', { presets: ['next/babel'] }],
  },
  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx'],
  testTimeout: 30000,
}

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