jest.config.js

export default {
  preset: 'ts-jest/presets/default-esm',
  testEnvironment: 'node',
  extensionsToTreatAsEsm: ['.ts'],
  moduleNameMapper: {
    '^(\\.{1,2}/.*)\\.js$': '$1',
  },
  transformIgnorePatterns: ['node_modules/(?!(validator|ms)/)'],
  // Set NODE_ENV to test
  setupFiles: ['<rootDir>/jest.setup.js'],
  // Run tests sequentially to avoid race conditions with build artifacts
  maxWorkers: 1,
  // Increase test timeout for build-dependent tests
  testTimeout: 10000,
  // Coverage configuration
  collectCoverageFrom: [
    'src/**/*.{ts,tsx}',
    '!src/**/*.d.ts',
    '!src/**/*.test.ts',
    '!src/**/*.spec.ts',
  ],
  coverageDirectory: 'coverage',
  coveragePathIgnorePatterns: [
    '/node_modules/',
    '/dist/',
    '/coverage/',
    '/test/',
  ],
  coverageThreshold: {
    global: {
      branches: 90,
      functions: 90,
      lines: 90,
      statements: 90,
    },
  },
  // Exclude integration tests from Jest test runs
  testPathIgnorePatterns: ['/node_modules/', '/dist/', '/test/integration/'],
};