jest.config.json

{
  "moduleFileExtensions": ["mjs", "cjs", "js", "json"],
  "testRegex": "./.*\\.(test|spec).(cjs|js|mjs)$",
  "transform": {
    "^.+\\.(js|jsx|ts|tsx)$": "./node_modules/babel-jest"
  },
  "moduleNameMapper": {
    "@/(.*)$": "<rootDir>/$1"
  },

  "collectCoverage": true,
  "coverageDirectory": "coverage",
  "coverageReporters": ["lcov", "text", "cobertura"],
  "collectCoverageFrom": ["**/*.{js,jsx,ts,tsx}", "!**/node_modules/**", "!**/coverage/**", "!server.js"]
}