jest.config.js

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

module.exports = {
  // Automatically clear mock calls and instances between every test
  clearMocks: true,
  testPathIgnorePatterns: [
    '/node_modules/',
    '/__tests__/fixtures/',
    '/__tests__/helpers/',
  ],
  // 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
  // causes issue (https://github.com/istanbuljs/istanbuljs/issues/572)
  // coverageProvider: 'v8',

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

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

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

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

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

  // The test environment that will be used for testing
  testEnvironment: 'node',

  // Avoid running tests twice
  roots: ['<rootDir>/src'],
};