jest.config.js

const fs = require('fs');
const path = require('path');

// Check if we're explicitly running unit tests only
const forceUnitOnly = process.env.JEST_UNIT_ONLY === 'true';

// Check if .env.test exists to determine if integration tests should run
const envTestPath = path.resolve(__dirname, '.env.test');
const integrationTestsEnabled = !forceUnitOnly && fs.existsSync(envTestPath);

// Check for verbose flag from command line
const isVerbose = process.argv.includes('--verbose');

/** @type {import('jest').Config} */
module.exports = {
  preset: 'ts-jest',
  testEnvironment: 'node',
  setupFilesAfterEnv: [
    integrationTestsEnabled
      ? '<rootDir>/tests/setup/setupTests.ts'
      : '<rootDir>/tests/setup/setupTests.unit.ts',
  ],
  transform: {
    '^.+\\.ts$': [
      'ts-jest',
      {
        tsconfig: {
          // ts-jest requires node resolution (bundler not supported by ts-jest)
          ignoreDeprecations: '6.0',
          module: 'commonjs',
          moduleResolution: 'node',
          allowSyntheticDefaultImports: true,
          esModuleInterop: true,
        },
      },
    ],
  },
  // Map .js imports to .ts files for ESM compatibility with CommonJS Jest
  // This allows proper resolution of imports like "from './file.js'" to find ./file.ts
  moduleNameMapper: {
    '^(\\.{1,2}/.*)\\.js$': '$1',
  },
  // Transform ESM modules from node_modules
  transformIgnorePatterns: ['node_modules/(?!(@clack/prompts|@clack/core|sisteransi|picocolors)/)'],
  testMatch: integrationTestsEnabled
    ? ['**/tests/**/*.test.ts', '**/?(*.)+(spec|test).ts']
    : ['**/tests/unit/**/*.test.ts'],
  collectCoverageFrom: ['src/**/*.ts', '!src/**/*.d.ts', '!tests/**/*', '!dist/**/*'],
  coverageDirectory: 'coverage',
  coverageReporters: ['text', 'lcov', 'html', 'json-summary'],
  // Control output verbosity - by default suppress verbose output, show only warnings/errors
  verbose: isVerbose,
  silent: !isVerbose, // Suppress console.log output in tests unless verbose mode
  testPathIgnorePatterns: integrationTestsEnabled
    ? ['<rootDir>/dist/', '<rootDir>/node_modules/']
    : ['<rootDir>/dist/', '<rootDir>/node_modules/', '<rootDir>/tests/integration/'],
  modulePathIgnorePatterns: ['<rootDir>/dist/'],
  globalSetup: integrationTestsEnabled ? '<rootDir>/tests/setup/globalSetup.js' : undefined,
  globalTeardown: integrationTestsEnabled ? '<rootDir>/tests/setup/globalTeardown.js' : undefined,
  moduleDirectories: ['node_modules', 'src'],
  // Use lifecycle pattern for integration tests with proper sequencing
  ...(integrationTestsEnabled && {
    testSequencer: '<rootDir>/tests/setup/sequencer.js',
    maxWorkers: 1, // Serial execution for lifecycle tests
    testTimeout: 30000, // Longer timeout for API calls
  }),
  ...(!integrationTestsEnabled && {
    testTimeout: 10000, // Standard timeout for unit tests
    maxWorkers: '50%', // Parallel execution with proper per-file mock isolation
    verbose: false,
    silent: true, // Suppress console.log output in unit tests
  }),
};