jest.config.js

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

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

    // Stop running tests after `n` failures
    // bail: 0,

    // The directory where Jest should store its cached dependency information
    // cacheDirectory: "/tmp/jest_rs",

    // 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: true,

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

    // 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/"
    // ],

    // Indicates which provider should be used to instrument code for coverage
    coverageProvider: "v8",

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

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

    // A path to a custom dependency extractor
    // dependencyExtractor: undefined,

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

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

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

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

    // A set of global variables that need to be available in all test environments
    globals: {
        "ts-jest": {
            tsConfigFile: "tsconfig.json",
        },
    },

    // The maximum amount of workers used to run your tests. Can be specified as % or a number.
    // E.g. maxWorkers: 10% will use 10% of your CPU amount + 1 as the maximum worker number.
    // maxWorkers: 2 will use a maximum of 2 workers.
    // maxWorkers: "50%",

    // 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: [
        "web.js",
        "js",
        "web.ts",
        "ts",
        "web.tsx",
        "tsx",
        "json",
        "web.jsx",
        "jsx",
        "node",
    ],

    // A map from regular expressions to module names or to arrays of module names
    // that allow to stub out resources with a single module
    moduleNameMapper: {
        "^react-native$": "react-native-web",
        "^.+\\.module\\.(css|sass|scss)$": "identity-obj-proxy",
    },
    // 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: "failure-change",

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

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

    // Use this configuration option to add custom reporters to Jest
    // reporters: undefined,

    // Automatically reset mock state before every test
    resetMocks: true,

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

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

    // Automatically restore mock state and implementation before every test
    // restoreMocks: false,

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

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

    // 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: [
        "react-app-polyfill/jsdom",
    ],

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

    // The number of seconds after which a test is considered as slow and
    // reported as such in the results.
    // slowTestThreshold: 5,

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

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

    // 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: [
    //   "**/__tests__/**/*.[jt]s?(x)",
    //   "**/?(*.)+(spec|test).[tj]s?(x)"
    // ],
    testMatch: [
        "<rootDir>/src/**/__tests__/**/*.{js,jsx,ts,tsx}",
        "<rootDir>/src/**/*.{spec,test}.{js,jsx,ts,tsx}",
    ],

    // An array of regexp pattern strings that are matched against
    // all test paths, matched tests are skipped

    // The regexp pattern or array of patterns that Jest uses to detect test files
    // testRegex: [],

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

    // This option allows use of a custom test runner
    // testRunner: "jest-circus/runner",

    // 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: undefined,
    transform: {
        "^.+\\.(js|jsx|mjs|cjs|ts|tsx)$": "<rootDir>/config/jest/babelTransform.js",
        "^.+\\.css$": "<rootDir>/config/jest/cssTransform.js",
        "^(?!.*\\.(js|jsx|mjs|cjs|ts|tsx|css|json)$)": "<rootDir>/config/jest/fileTransform.js",
    },

    // An array of regexp pattern strings that are matched against
    // all source file paths, matched files will skip transformation
    transformIgnorePatterns: [
        "[/\\\\]node_modules[/\\\\].+\\.(js|jsx|mjs|cjs|ts|tsx)$",
        "^.+\\.module\\.(css|sass|scss)$",
    ],

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

    // 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,

    watchPlugins: [
        "jest-watch-typeahead/filename",
        "jest-watch-typeahead/testname",
    ],
};