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: ["app/**/*.{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>/enzyme.config.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)"],

  // 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
};