jest.config.js

// ABOUTME: Jest configuration for Node.js/JavaScript testing
// ABOUTME: Configures Jest with TypeScript support and Twilio Functions compatibility

module.exports = {
  // Test environment
  testEnvironment: 'node',
  
  // File extensions to test
  testMatch: [
    '**/__tests__/**/*.(js|ts)',
    '**/*.(test|spec).(js|ts)'
  ],
  
  // Coverage configuration
  collectCoverageFrom: [
    'src/**/*.{js,ts}',
    'functions/**/*.{js,ts}',
    '!**/*.d.ts',
    '!**/node_modules/**',
    '!**/coverage/**'
  ],
  
  // Coverage thresholds - Relaxed for template/starter project
  coverageThreshold: {
    global: {
      branches: 50,
      functions: 50,
      lines: 50,
      statements: 50
    }
  },
  
  // Setup files
  setupFilesAfterEnv: ['<rootDir>/jest.setup.js'],
  
  // Transform TypeScript files
  transform: {
    '^.+\\.ts$': 'ts-jest'
  },
  
  // Module file extensions
  moduleFileExtensions: ['js', 'ts', 'json'],
  
  // Clear mocks between tests
  clearMocks: true,
  
  // Verbose output
  verbose: true,
  
  // Test timeout for async operations
  testTimeout: 10000
};