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,

  // Indicates whether the coverage information should be collected while executing the test
  collectCoverage: false,

  // The directory where Jest should output its coverage files
  coverageDirectory: 'coverage',

  // Coverage collection configuration
  collectCoverageFrom: [
    'src/**/*.{ts,tsx}',
    '!src/**/*.d.ts',
    '!src/index.tsx',
    '!src/**/*.test.{ts,tsx}',
    '!src/**/__tests__/**',
  ],

  // Coverage thresholds
  coverageThreshold: {
    global: {
      branches: 70,
      functions: 70,
      lines: 70,
      statements: 70,
    },
  },

  // An array of directory names to be searched recursively up from the requiring module's location
  moduleDirectories: [
    "node_modules",
    "<rootDir>/src"
  ],

  // A map from regular expressions to module names that allow to stub out resources with a single module
  moduleNameMapper: {
    '\\.(css|less)$': '<rootDir>/__mocks__/styleMock.js',
    "\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$": "<rootDir>/__mocks__/fileMock.js",
    "@app/(.*)": '<rootDir>/src/app/$1'
  },

  // A preset that is used as a base for Jest's configuration
  preset: "ts-jest/presets/js-with-ts",

  // The test environment that will be used for testing.
  testEnvironment: "jest-fixed-jsdom",

  // Setup files after environment
  setupFilesAfterEnv: ['<rootDir>/jest.setup.ts'],

  // Test match patterns
  testMatch: [
    '**/__tests__/**/*.(test|spec).(ts|tsx|js)',
    '**/*.(test|spec).(ts|tsx|js)',
  ],

  // Transform files with ts-jest
  transform: {
    '^.+\\.(ts|tsx)$': ['ts-jest', {
      tsconfig: {
        jsx: 'react',
        esModuleInterop: true,
        allowSyntheticDefaultImports: true,
      },
    }],
  },

  // Module file extensions
  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json'],

  // Ignore patterns
  testPathIgnorePatterns: [
    '/node_modules/',
    '/dist/',
    '/coverage/',
  ],

  // Verbose output
  verbose: true,
};