jest.config.js

// For a detailed explanation regarding each configuration property, visit:
// https://jestjs.io/docs/en/configuration.html

module.exports = {
  // All imported modules in your tests should be mocked automatically
  // automock: false,

  // Stop running tests after the first failure
  // bail: false,

  // Respect "browser" field in package.json when resolving modules
  // browser: false,

  // The directory where Jest should store its cached dependency information
  // cacheDirectory: "/var/folders/_0/1zfvkfzx78ndwgg6rnwg5qkw0000gn/T/jest_dx",

  // Automatically clear mock calls and instances between 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: ["web/**/*.js"],

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

  // An array of regexp pattern strings used to skip coverage collection
  coveragePathIgnorePatterns: [
    "/node_modules/",
  ],

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

  // An object that configures minimum threshold enforcement for coverage results
  // coverageThreshold: null,

  // Make calling deprecated APIs throw helpful error messages
  // errorOnDeprecated: false,

  // Force coverage collection from ignored files usin a array of glob patterns
  // forceCoverageMatch: [],

  // A path to a module which exports an async function that is triggered once before all test suites
  // globalSetup: null,

  // A path to a module which exports an async function that is triggered once after all test suites
  // globalTeardown: null,

  // A set of global variables that need to be available in all test environments
  // globals: {},

  // An array of directory names to be searched recursively up from the requiring module's location
  // moduleDirectories: [
  //   "node_modules"
  // ],

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

    // A map from regular expressions to module names that allow to stub out resources with a single module
    moduleNameMapper: {
        "^web(.*)$": "<rootDir>/web/$1",
        "^tests(.*)$": "<rootDir>/tests/$1",
    },

  // An array of regexp pattern strings, matched against all module paths before considered 'visible' to the module loader
  // modulePathIgnorePatterns: [],

  // Activates notifications for test results
  // notify: false,

  // An enum that specifies notification mode. Requires { notify: true }
  // notifyMode: "always",

  // A preset that is used as a base for Jest's configuration
  // preset: null,

  // Run tests from one or more projects
  // projects: null,

  // Use this configuration option to add custom reporters to Jest
  "reporters": [
    "default",
    ["jest-junit", {
      "output": "temp/junit.xml",
      "usePathForSuiteName": "true"
    }],
  ],
  // Automatically reset mock state between every test
  // resetMocks: false,

  // Reset the module registry before running each individual test
  // resetModules: false,

  // A path to a custom resolver
  // resolver: null,

  // Automatically restore mock state between every test
  // restoreMocks: false,

  // The root directory that Jest should scan for tests and modules within
  // rootDir: null,

  // A list of paths to directories that Jest should use to search for files in
  // roots: [
  //   "<rootDir>"
  // ],

  // Allows you to use a custom runner instead of Jest's default test runner
  // runner: "jest-runner",

  // The paths to modules that run some code to configure or set up the testing environment before each test
  // setupFiles: [  ],

  // The paths to modules that run some code to configure or set up the testing framework before each test
  "setupFilesAfterEnv": [ __dirname+"/jest.setup.js" ],


  // A list of paths to snapshot serializer modules Jest should use for snapshot testing
  "snapshotSerializers": [ "jest-serializer-html" ],

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

  // Options that will be passed to the testEnvironment
  // testEnvironmentOptions: {},

  // Adds a location field to test results
  // testLocationInResults: false,

  // The glob patterns Jest uses to detect test files
  testMatch: [
    "**/*.spec.js"
  ],

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

  // The regexp pattern Jest uses to detect test files
  // testRegex: "",

  // This option allows the use of a custom results processor
  // testResultsProcessor: null,

  // This option allows use of a custom test runner
  // testRunner: "jasmine2",

  // This option sets the URL for the jsdom environment. It is reflected in properties such as location.href
  testURL: "http://localhost",


  // Setting this value to "fake" allows the use of fake timers for functions such as "setTimeout"
  // timers: "real",

  // A map from regular expressions to paths to transformers
  // transform: null,

  // An array of regexp pattern strings that are matched against all source file paths, matched files will skip transformation
  // transformIgnorePatterns: [
  //   "/node_modules/"
  // ],

  // An array of regexp pattern strings that are matched against all modules before the module loader will automatically return a mock for them
  unmockedModulePathPatterns: [
    "react",
  ],


  // Indicates whether each individual test should be reported during the run
  // verbose: true,

  // An array of regexp patterns that are matched against all source file paths before re-running tests in watch mode
  // watchPathIgnorePatterns: [],

  // Whether to use watchman for file crawling
  // watchman: true,
};