jest.config.mjs

const defaultConfig = {
  coverageDirectory: 'coverage',
  coverageProvider: 'v8',
  coverageReporters: ['lcov', 'text'],
  coverageThreshold: {
    global: {
      branch: 100,
      functions: 100,
      lines: 100,
      statements: 100
    }
  },
  maxWorkers: '50%',
  watchPathIgnorePatterns: ['node_modules'],
  transformIgnorePatterns: ['node_modules']
}


export default {
  projects: [{
    ...defaultConfig,
    testEnvironment: 'node',
    displayName: 'backend',
    collectCoverageFrom: ['server', '!server/index.js'],
    transformIgnorePatterns: [...defaultConfig.transformIgnorePatterns, 'public'],
    testMatch: ['**/tests/**/server/**/*.test.js']
  }, {
    ...defaultConfig,
    testEnvironment: 'jsdom',
    displayName: 'frontend',
    collectCoverageFrom: ['public'],
    transformIgnorePatterns: [...defaultConfig.transformIgnorePatterns, 'server'],
    testMatch: ['**/tests/**/public/**/*.test.js']
  }]
}