package.json.md

 {
 //  ...
 "jest": {
    "moduleFileExtensions": ["js", "jsx", "json", "ts", "tsx"],
    "collectCoverage": true,
    "collectCoverageFrom": [
      "**/*.{ts,js}",
      "!**/node_modules/**",
      "!**/build/**",
      "!**/coverage/**"
    ],
    "transform": {
      "\\.ts$": "<rootDir>/node_modules/ts-jest/preprocessor.js"
    },
    "coverageThreshold": {
      "global": {
        "branches": 100,
        "functions": 100,
        "lines": 100,
        "statements": 100
      }
    },
    "coverageReporters": [
      "text",
      "text-summary"
    ],
    "testRegex": "(/__tests__/.*|(\\.|/)(test|spec))\\.(js|ts)x?$",
    "testPathIgnorePatterns": [
      "/node_modules/",
      "/build/",
      "/coverage/"
    ]
  }
  // ...
 }