jest.config.js

module.exports = {
  collectCoverageFrom: ['**/*.{js,jsx,ts,tsx}', '!**/*.d.ts', '!**/node_modules/**'],
  testMatch: ['**/__tests__/**/*.{js,ts}?(x)', '**/*.test.{js,ts}?(x)'],
  moduleNameMapper: {
    /* Handle CSS imports (with CSS modules)
    https://jestjs.io/docs/webpack#mocking-css-modules */
    '^.+\\.module\\.(css|sass|scss)$': 'identity-obj-proxy',

    // Handle CSS imports (without CSS modules)
    '^.+\\.(css|sass|scss)$': '<rootDir>/__tests__/mocks/styleMock.js',

    /* Handle image imports
    https://jestjs.io/docs/webpack#handling-static-assets */
    '^.+\\.(jpg|jpeg|png|gif|webp|avif|svg)$': '<rootDir>/__tests__/mocks/fileMock.js',

    /* Handle compilerOptions.paths in ./tsconfig */
    '@src(.*)': '<rootDir>/src/$1',
    '@public(.*)': '<rootDir>/public/$1',
    '@config(.*)': '<rootDir>/config/$1',
    '@info(.*)': '<rootDir>/webpage_info/$1',
  },
  modulePaths: ['<rootDir>'],
  testPathIgnorePatterns: ['<rootDir>/node_modules/', '<rootDir>/.next/', '<rootDir>/__tests__'],
  testEnvironment: 'jsdom',
  transform: {
    /* Use babel-jest to transpile tests with the next/babel preset
    https://jestjs.io/docs/configuration#transform-objectstring-pathtotransformer--pathtotransformer-object */
    '^.+\\.(js|jsx|ts|tsx)$': ['babel-jest', { presets: ['next/babel'] }],
  },
  transformIgnorePatterns: ['/node_modules/', '^.+\\.module\\.(css|sass|scss)$'],
  setupFilesAfterEnv: ['<rootDir>/jest.setup.js'],
};