oosby

describe("updateFooSaga", () => {
    afterEach(() => {
      global.fetch = jest.fn().mockReset();
    });
    const gen = updateFooSaga(updateFoo(mockFoo));
    it("should handle successful fetch request", () => {
      global.fetch = jest.fn().mockResolvedValueOnce({
        ok: true,
        json: () => Promise.resolve(mockSuccessResponse),
      });

oosby

beforeEach(() => {
    jest.spyOn(window, 'location', 'get').mockReturnValue({
      ...window.location,
      href: 'https://myapp.com'
    });
  });

oosby

"test": "jest --detectOpenHandles --forceExit --coverage --collectCoverageFrom=src/components/common/**/*.{js,jsx,ts,tsx} src/components/common/",

oosby

process.env.npm_package_name
process.env.npm_package_...

oosby

import * as utils from '../utils';

utils.isSomething = jest.fn(() => true);

oosby

const utilityObj = require('../../utils/obj');

jest.mock('../../utils/obj', () => {
  return {
    ...jest.requireActual(''../../utils/obj'),
    getDefaultOptions: jest.fn((req, path) => {
      console.log('mock', path)
      return // mocked stuff
    }),
  }

oosby

import { SOME_VALUE } from '../constants';

jest.mock('../constants', () => ({ SOME_VALUE: 'abc123test' }));

oosby

function enummaker(obj = {}) {
    let newEnum = obj;

    newEnum[Symbol.iterator] = function() {
        let i = 0;
        let keys = Object.keys(this);
        return {
            next: function() {
                let value = keys[i];
                i++;

oosby

function singletonMaker(key, klassname, namespace) { 
  if (!window[namespace]) {
    window[namespace] = {};
  }

  const keySymbol = Symbol.for(key);
  const globalSymbols = Object.getOwnPropertySymbols(namespace);
  const hasKey = (globalSymbols.indexOf(keySymbol) > -1);
  
  if (!hasKey) {

oosby

const mutationObserver = new MutationObserver((e) => {
        if (e[0].removedNodes) {
            console.log('%cremoved nodes %o', 'color:aquamarine', e[0].removedNodes);
        }
    });

// watch just the child nodes
mutationObserver.observe(document.querySelector('main'), { childList: true });