jest.config.js

module.exports = {
  collectCoverageFrom: [
    "/*.{js,jsx,ts,tsx}",
    "!/*.d.ts",
    "!/node_modules/",
    "!<rootDir>/out/",
    "!<rootDir>/.next/",
    "!<rootDir>/*.config.js",
    "!<rootDir>/coverage/**",
  ],
  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)$": "<rootDir>/mocks/fileMock.js",
  },
  moduleDirectories: ["node_modules", "<rootDir>/"],
  testPathIgnorePatterns: ["<rootDir>/node_modules/", "<rootDir>/.next/"],
  testEnvironment: "jsdom",
  transform: {
    /* Use babel-jest to transpile tests with the next/babel preset
    https://jestjs.io/docs/configuration#transform-objectstring-pathtotransformer--pathtotransformer-object */
    "^.+\\.(js|jsx|ts|tsx)$": ["babel-jest", { presets: ["next/babel"] }],
  },
  transformIgnorePatterns: [
    "/node_modules/",
    "^.+\\.module\\.(css|sass|scss)$",
  ],
  setupFilesAfterEnv: ["<rootDir>/jest.setup.js"],
};