cim_summary/backend/jest.config.js

module.exports = {
  // Test environment
  testEnvironment: 'node',
  
  // Test file patterns
  testMatch: [
    '**/__tests__/**/*.(ts|tsx|js)',
    '**/*.(test|spec).(ts|tsx|js)'
  ],
  
  // File extensions
  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json'],
  
  // Transform files
  transform: {
    '^.+\\.(ts|tsx)$': 'ts-jest',
    '^.+\\.(js|jsx)$': 'babel-jest'
  },
  
  // Setup files
  setupFilesAfterEnv: [
    '<rootDir>/src/__tests__/setup.ts'
  ],
  
  // Coverage configuration
  collectCoverage: true,
  collectCoverageFrom: [
    'src/**/*.(ts|tsx|js)',
    '!src/**/*.d.ts',
    '!src/**/*.test.(ts|tsx|js)',
    '!src/**/*.spec.(ts|tsx|js)',
    '!src/__tests__/**',
    '!src/migrations/**',
    '!src/scripts/**',
    '!src/index.ts'
  ],
  coverageDirectory: 'coverage',
  coverageReporters: [
    'text',
    'lcov',
    'html',
    'json'
  ],
  coverageThreshold: {
    global: {
      branches: 80,
      functions: 80,
      lines: 80,
      statements: 80
    }
  },
  
  // Test timeout
  testTimeout: 30000,
  
  // Verbose output
  verbose: true,
  
  // Clear mocks between tests
  clearMocks: true,
  
  // Restore mocks between tests
  restoreMocks: true,
  
  // Module name mapping
  moduleNameMapping: {
    '^@/(.*)$': '<rootDir>/src/$1',
    '^@config/(.*)$': '<rootDir>/src/config/$1',
    '^@services/(.*)$': '<rootDir>/src/services/$1',
    '^@models/(.*)$': '<rootDir>/src/models/$1',
    '^@routes/(.*)$': '<rootDir>/src/routes/$1',
    '^@middleware/(.*)$': '<rootDir>/src/middleware/$1',
    '^@utils/(.*)$': '<rootDir>/src/utils/$1',
    '^@types/(.*)$': '<rootDir>/src/types/$1'
  },
  
  // Test environment variables
  testEnvironmentOptions: {
    NODE_ENV: 'test'
  },
  
  // Global test setup
  globalSetup: '<rootDir>/src/__tests__/globalSetup.ts',
  globalTeardown: '<rootDir>/src/__tests__/globalTeardown.ts',
  
  // Projects for different test types
  projects: [
    {
      displayName: 'unit',
      testMatch: [
        '<rootDir>/src/**/__tests__/**/*.test.(ts|tsx|js)',
        '<rootDir>/src/**/*.test.(ts|tsx|js)'
      ],
      testPathIgnorePatterns: [
        '<rootDir>/src/__tests__/integration/',
        '<rootDir>/src/__tests__/e2e/',
        '<rootDir>/src/__tests__/performance/'
      ]
    },
    {
      displayName: 'integration',
      testMatch: [
        '<rootDir>/src/__tests__/integration/**/*.test.(ts|tsx|js)'
      ],
      setupFilesAfterEnv: [
        '<rootDir>/src/__tests__/integration/setup.ts'
      ]
    },
    {
      displayName: 'e2e',
      testMatch: [
        '<rootDir>/src/__tests__/e2e/**/*.test.(ts|tsx|js)'
      ],
      setupFilesAfterEnv: [
        '<rootDir>/src/__tests__/e2e/setup.ts'
      ]
    },
    {
      displayName: 'performance',
      testMatch: [
        '<rootDir>/src/__tests__/performance/**/*.test.(ts|tsx|js)'
      ],
      setupFilesAfterEnv: [
        '<rootDir>/src/__tests__/performance/setup.ts'
      ]
    }
  ],
  
  // Watch plugins
  watchPlugins: [
    'jest-watch-typeahead/filename',
    'jest-watch-typeahead/testname'
  ],
  
  // Notify mode
  notify: true,
  notifyMode: 'change',
  
  // Cache directory
  cacheDirectory: '<rootDir>/.jest-cache',
  
  // Maximum workers
  maxWorkers: '50%',
  
  // Force exit
  forceExit: true,
  
  // Detect open handles
  detectOpenHandles: true,
  
  // Run tests in band for integration tests
  runInBand: false,
  
  // Bail on first failure (for CI)
  bail: process.env.CI ? 1 : 0,
  
  // Reporters
  reporters: [
    'default',
    [
      'jest-junit',
      {
        outputDirectory: 'coverage',
        outputName: 'junit.xml',
        classNameTemplate: '{classname}',
        titleTemplate: '{title}',
        ancestorSeparator: ' › ',
        usePathForSuiteName: true
      }
    ]
  ]
};