jest.config.cjs

module.exports = {
  // Use ts-jest preset for TypeScript support
  preset: 'ts-jest',

  // Specify the test environment (node for backend projects)
  testEnvironment: 'node',

  // Root directory for test files
  roots: ['<rootDir>/test'],

  // Glob patterns for test files
  testMatch: ['**/?(*.)+(spec|test).[jt]s?(x)'],

  // Automatically clear mock calls and instances between every test
  clearMocks: true,

  // Collect code coverage information
  collectCoverage: true,

  // Output directory for coverage reports
  coverageDirectory: 'coverage',

  // Coverage report formats
  coverageReporters: ['text', 'lcov'],

  // Module file extensions for importing
  moduleFileExtensions: ['ts', 'js'],

  // Transform settings for ts-jest
  transform: {
    '^.+\\.(ts|tsx)$': 'ts-jest'
  },

  moduleNameMapper: {
    '^(.+)/version\\.js$': '$1/version.ts',
    '^(.+)/utils\\.js$': '$1/utils.ts'
  }
};