jest.config.ts

import { Config } from "jest";

process.env.TZ = "UTC";

// You can learn more about each option below in the Jest docs: https://jestjs.io/docs/configuration.
const jestConfig: Config = {
  collectCoverageFrom: [
    "**/*.{js,jsx,ts,tsx}",
    "!**/*.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>/tests/__mocks__/styleMock.js",

    // Handle image imports
    // https://jestjs.io/docs/webpack#handling-static-assets
    "^.+\\.(png|jpg|jpeg|gif|webp|avif|ico|bmp|svg)$":
      "<rootDir>/tests/__mocks__/fileMock.js",
  },
  setupFilesAfterEnv: ["<rootDir>/tests/setup.ts"],
  testPathIgnorePatterns: ["<rootDir>/node_modules/", "<rootDir>/.next/"],
  transform: {
    // Use babel-jest to transpile tests with the next/babel preset
    // https://jestjs.io/docs/configuration#transform-objectstring-pathtotransformer--pathtotransformer-object
    "^.+\\.(js|jsx|ts|tsx)$": ["babel-jest", { presets: ["next/babel"] }],

    "\\.mdx$": "<rootDir>/tests/__mocks__/blogPostMockTransformer.js",
  },
  transformIgnorePatterns: [
    "/node_modules/",
    "^.+\\.module\\.(css|sass|scss)$",
  ],
  testEnvironment: "jsdom",
};

export default jestConfig;