jest.config.ts

import type { Config } from 'jest'

const config: Config = {
  modulePathIgnorePatterns: ['./cypress'],
  collectCoverageFrom: ['src/**/*.{js,jsx,ts,tsx}'],
  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',

    /* Handle React markdown not being pre-compiled */
    'react-markdown':
      '<rootDir>/node_modules/react-markdown/react-markdown.min.js',
  },
  coverageReporters: [
    'clover',
    'json',
    'json-summary',
    'lcov',
    ['text', { skipFull: true }],
  ],
  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)$': ['babel-jest', { presets: ['next/babel'] }],
  },
  transformIgnorePatterns: [
    '/node_modules/',
    '^.+\\.module\\.(css|sass|scss)$',
  ],
}

export default config