jest.config.js

export default {
  preset: 'ts-jest/presets/default-esm',
  extensionsToTreatAsEsm: ['.ts'],
  testEnvironment: 'node',
  roots: ['<rootDir>/src'],
  testMatch: ['**/__tests__/**/*.test.ts'],
  transform: {
    '^.+\\.ts$': ['ts-jest', {
      useESM: true,
      tsconfig: {
        target: 'ES2022',
        module: 'ES2022',
        lib: ['ES2022'],
        moduleResolution: 'node',
        allowSyntheticDefaultImports: true,
        esModuleInterop: true,
        skipLibCheck: true,
        strict: true,
        resolveJsonModule: true
      },
    }],
  },
  moduleNameMapper: {
    '^(\\.{1,2}/.*)\\.js$': '$1',
  },
  collectCoverageFrom: [
    'src/**/*.ts',
    '!src/**/*.d.ts',
    '!src/__tests__/**',
  ],
  coverageDirectory: 'coverage',
  coverageReporters: ['text', 'lcov', 'html'],
  coverageThreshold: {
    global: {
      branches: 67,
      functions: 62,
      lines: 68,
      statements: 67,
    },
  },
  testTimeout: 10000, // 10 seconds for async operations
};