jest.config.js

/*
 * For a detailed explanation regarding each configuration property, visit:
 * https://jestjs.io/docs/en/configuration.html
 */

module.exports = {
  // Automatically clear mock calls and instances between every test
  clearMocks: true,

  // A list of paths to modules that run some code to configure or set up the testing framework before each test
  setupFilesAfterEnv: ['<rootDir>/src/jest.setup.ts'],

  // The test environment that will be used for testing
  testEnvironment: 'jsdom',

  // An array of regexp pattern strings that are matched against all test paths, matched tests are skipped
  testPathIgnorePatterns: ['cypress'],

  // A map from regular expressions to paths to transformers
  transform: {
    '^.+\\.(js|jsx|ts|tsx)$': 'ts-jest',
  },

  moduleNameMapper: {
    '^react$': 'preact/compat',
    '^react-dom/test-utils$': 'preact/test-utils',
    '^react-dom$': 'preact/compat',
    '^react/jsx-runtime$': 'preact/jsx-runtime',
  },

  globals: {
    'ts-jest': {
      tsconfig: '<rootDir>/tsconfig.jest.json',
    },
  },
};