jest.config.js

module.exports = {
  // Automatically clear mock calls, instances and results before every test
  clearMocks: true,

  // Indicates whether the coverage information should be collected while executing the test
  collectCoverage: false,

  // An array of glob patterns indicating a set of files for which coverage information should be collected
  collectCoverageFrom: [
    "src/**/*.ts",
    "!src/app",
  ],

  // The directory where Jest should output its coverage files
  coverageDirectory: "coverage",

  // An array of regexp pattern strings used to skip coverage collection
  coveragePathIgnorePatterns: [
    "/node_modules/",
    "types\\.ts",
    "index\\.ts",
    ".+\\.d\\.ts"
  ],

  // A list of reporter names that Jest uses when writing coverage reports
  // coverageReporters: [
  //   "json",
  //   "text",
  //   "lcov",
  //   "clover"
  // ],

  // An array of file extensions your modules use
  moduleFileExtensions: [
    "js",
    "jsx",
    "ts",
    "tsx",
    "json",
    "node"
  ],

  // A list of paths to modules that run some code to configure or set up the testing framework before each test
  // setupFilesAfterEnv: [],

  // The test environment that will be used for testing
  testEnvironment: "jest-environment-node",

  // An array of regexp pattern strings that are matched against all test paths, matched tests are skipped
  testPathIgnorePatterns: [
    "/node_modules/"
  ],
};