Any ideas on this code  jest.useFakeTimers()   it('simpleTimer', async () => {   async function simpleTimer(callback) {     await callback()    // LINE-A without await here, test works as expected.     setTimeout(() => {       simpleT...
I'm trying to write a simple test for a simple React component, and I want to use Jest to confirm that a function has been called when I simulate a click with enzyme. According to the Jest docs, I should be able to use spyOn to do this: spyOn.  H...
I'm trying to fiddle with Ecmascript 6 modules using webpack + traceur to transpile to ES5 CommonJS, but I'm having trouble successfully unit testing them.  I tried using Jest + traceur preprocessor, but the automocking and dependency names s...
I recently wanted to test that some custom method gets conditionally called in the componentDidMount method of a React component.  componentDidMount() {   if (this.props.initOpen) {     this.methodName();   } }   I'm using Jest as my testing fram...
Original  First of all, I am following the Flux architecture.  I have an indicator that shows a number of seconds, ex: 30 seconds. Every one second it shows 1 second less, so 29, 28, 27 till 0. When arrives to 0, I clear the interval so it stops repe...
Simulating a button click seems like a very easy/standard operation. Yet, I can't get it to work in Jest.js tests.   This is what I tried (and also doing it using jquery), but it didn't seem to trigger anything:  import { mount } from 'en...
Using the code from this answer to solve clicking outside of a component:  componentDidMount() {     document.addEventListener('mousedown', this.handleClickOutside); }  componentWillUnmount() {     document.removeEventListener('mousedown&...
In my code, I trigger a callback upon "OK" click of a window.confirm prompt, and I want to test that the callback is triggered.  In sinon, I can stub the window.confirm function via:  const confirmStub = sinon.stub(window, 'confirm');...
I am creating a JS test on my react-native project. I'm specifically using firebase for react native, in which I would like to replace firebase instance with a mockfirebase instance if JS is running the code of my class.  For example I have class...
Jest runs your test suite in parallel by default, but there is a flag (--runInBand) that allows you to run the whole suite sequentially (as pointed out here)  I have some tests that cannot run in parallel, but running the whole suite sequentially tak...

Tags

Recent Questions

Top Questions

Home Tags Terms of Service Privacy Policy DMCA Contact Us

©2020 All rights reserved.