jest.config.js

module.exports = {
    collectCoverageFrom: ['**/*.test.{js,jsx,ts,tsx}', '!**/*.style.ts', '!**/*.d.ts', '!**/node_modules/**'],
    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>/__mocks__/styleMock.js',

        /* Handle image imports
      https://jestjs.io/docs/webpack#handling-static-assets */
        '^.+\\.(jpg|jpeg|png|gif|webp|svg)$': '<rootDir>/__mocks__/fileMock.js',
    },
    testPathIgnorePatterns: ['<rootDir>/node_modules/', '<rootDir>/.next/'],
    testEnvironment: 'jsdom',
    transform: {
        /* Use babel-jest to transpile tests with the next/babel preset
      https://jestjs.io/docs/configuration#transform-objectstring-pathtotransformer--pathtotransformer-object */
        '^.+\\.(js|jsx|ts|tsx)$': ['babel-jest', { presets: ['next/babel'] }],
    },
    transformIgnorePatterns: ['/node_modules/', '^.+\\.module\\.(css|sass|scss)$'],
    setupFilesAfterEnv: ['<rootDir>/jest.setup.js'],
    snapshotSerializers: ['@emotion/jest/serializer'],
}