jest.config.js

module.exports = {
  preset: 'ts-jest',
  testEnvironment: 'node',
  roots: ['<rootDir>/src', '<rootDir>/tests'],
  testMatch: [
    '**/__tests__/**/*.ts',
    '**/?(*.)+(spec|test).ts'
  ],
  transform: {
    '^.+\\.ts$': 'ts-jest',
  },
  collectCoverageFrom: [
    'src/**/*.ts',
    '!src/**/*.d.ts',
    '!src/index.ts'
  ],
  coverageDirectory: 'coverage',
  coverageReporters: ['text', 'lcov', 'html'],
  setupFilesAfterEnv: ['<rootDir>/tests/setup.ts'],
  testTimeout: 30000,
  // CI-specific configuration
  maxWorkers: process.env.CI ? 2 : '50%',
  forceExit: true,
  detectOpenHandles: true,
  // Reduce memory usage in CI
  ...(process.env.CI && {
    maxWorkers: 1,
    workerIdleMemoryLimit: '512MB'
  })
};