jest.config.mjs

export default {
  collectCoverage: true,
  coverageDirectory: "coverage",
  collectCoverageFrom: [
    "./src/**/*.ts",
    "!./src/__tests__/**/*.ts"
  ],
  coverageReporters: [
    "lcov"
  ],
  moduleFileExtensions: [
    "ts",
    "js"
  ],
  extensionsToTreatAsEsm: [".ts"],
  preset: "ts-jest/presets/default-esm",
  moduleNameMapper: {
    "^(\\.{1,2}/.*)\\.js$": "$1",
  },
  transform: {
    "^.+\\.ts$": [
      "ts-jest",
      {
        tsconfig: "tsconfig.jest.json",
        useESM: true,
      },
    ],
  },
  testMatch: [
    "<rootDir>/src/__tests__/*.spec.ts"
  ]
};