jest.config.js

const nextJest = require('next/jest')

const createJestConfig = nextJest({})

const customJestConfig = {
  collectCoverageFrom: [
    '**/*.{js,jsx,ts,tsx}',
    '!**/*.d.ts',
    '!**/*.config.js',
    '!**/node_modules/**',
    '!**/.next/**',
    '!**/coverage/**',
    '!**/http/**',
    '!**/lib/react-currency-input-field/**', // external package: https://github.com/cchanxzy/react-currency-input-field
    '!**/src/utils/unit-tests/**',
    '!**/locales/**',
    '!**/icons/**'
  ],
  setupFilesAfterEnv: ['<rootDir>/jest.setup.js'],
  verbose: true,
  modulePaths: ['<rootDir>/lib'],
  modulePathIgnorePatterns: ['<rootDir>/.next'],
  testPathIgnorePatterns: ['<rootDir>/node_modules/', '<rootDir>/.next/'],
  transform: {
    '^.+\\.(js|jsx|ts|tsx)$': ['babel-jest', { presets: ['next/babel'] }]
  },
  transformIgnorePatterns: [
    '/node_modules/',
    '^.+\\.module\\.(css|sass|scss)$'
  ],
  testEnvironment: 'jsdom',
  moduleNameMapper: {
    '^.+\\.(css|sass|scss)$': '<rootDir>/__mocks__/styleMock.js',
    '^.+\\.(png|jpg|jpeg|gif|webp|avif|ico|bmp|svg)$/i':
      '<rootDir>/__mocks__/fileMock.js',
    '^@/common/(.*)$': '<rootDir>/src/common/$1',
    '^@/modules/(.*)$': '<rootDir>/src/modules/$1',
    '^@/pages/(.*)$': '<rootDir>/src/pages/$1',
    '^@/lib/(.*)$': '<rootDir>/lib/$1',
    '^@/locales/(.*)$': '<rootDir>/locales/$1',
    '^@/utils/(.*)$': '<rootDir>/src/utils/$1',
    '^@/icons/(.*)$': '<rootDir>/src/icons/$1',
    '^@/src/(.*)$': '<rootDir>/src/$1',
    '^uuid$': require.resolve('uuid')
  }
}

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