jest.json

{
  "moduleFileExtensions": [
    "ts",
    "tsx",
    "js",
    "json"
  ],
  "transform": {
    "^.+\\.tsx?$": "<rootDir>/node_modules/ts-jest/preprocessor.js"
  },
  "testRegex": "/src/.*\\.(test|spec).(ts|tsx|js)$",
  "collectCoverageFrom" : ["src/**/*.{js,jsx,tsx,ts}", "!**/node_modules/**", "!**/vendor/**"],
  "coverageReporters": ["json", "lcov"]
}