jest.config.js

export default {
  preset: 'ts-jest/presets/default-esm',
  extensionsToTreatAsEsm: ['.ts'],
  testEnvironment: 'node',
  roots: ['<rootDir>/src', '<rootDir>/tests'],
  testMatch: [
    '**/__tests__/**/*.ts',
    '**/*.test.ts'
  ],
  transform: {
    '^.+\\.ts$': ['ts-jest', {
      useESM: true,
      tsconfig: {
        module: 'ES2022',
        target: 'ES2022'
      }
    }]
  },
  moduleNameMapper: {
    '^(\\.{1,2}/.*)\\.js$': '$1'
  },
  transformIgnorePatterns: [
    'node_modules/(?!(chalk|#ansi-styles)/)'
  ],
  collectCoverageFrom: [
    'src/**/*.ts',
    '!src/**/*.d.ts',
    '!src/**/__tests__/**',
    '!src/**/*.test.ts'
  ],
  coverageDirectory: 'coverage',
  coverageReporters: ['text', 'lcov', 'html'],
  setupFilesAfterEnv: ['<rootDir>/tests/setup.ts']
};