jest.config.js

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

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

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

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

    // The paths to modules that run some code to configure or set up the testing environment before each test
    setupFiles: ['<rootDir>/babel.config.json'],
    setupFilesAfterEnv: ['<rootDir>/setupTests.js'],
    // The test environment that will be used for testing
    testEnvironment: 'jsdom',

    // The glob patterns Jest uses to detect test files
    testMatch: ['**/__tests__/**/*.js?(x)', '**/?(*.)+(spec|test).js?(x)'],

    // Add mockups for CSS files and other unnecessary files
    moduleNameMapper: {
        "\\.(css|less|sass|scss)$": "<rootDir>/__mocks__/styleMock.js",
        "\\.(gif|ttf|eot|svg)$": "<rootDir>/__mocks__/fileMock.js"
    },

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

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

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


    // Indicates whether each individual test should be reported during the run
    verbose: false,
};