I have some test code like this: I would like to break apart the code into multiple test blocks (because I can’t even add a description message to each expect statement). If Jest supported async describe, I could do this: I could duplicate the setup call for each test of course, but that would slow down…
Tag: jestjs
Jest : ReferenceError: describe is not defined
I try to setup jest for my project following this tutorial : https://dev.to/nedsoft/testing-nodejs-express-api-with-jest-and-supertest-1km6 But when I try to run a basic test I’ve got the error below : I try to remove in my package.json : But nothing change. A idea ? Answer Ok the problem is last versio…
Start and stop server with supertest
I have the following server class : I’m using supertest for end-to-end testing. I wish to start my application beforeAll tests and stop it when the tests are done. It’s easy to do that using beforAll and afterAll where I can just once instanciate the Server class and call the start and close metho…
How to set env in package.json which is used within .bablerc
I am trying to run Jest tests as part of a script before I then run webpack, like this. Jest only works with compiled code, so I had set my .babelrc to the following, which worked, however then it transpiled all my code in webpack which I didn’t want, in development mode I want to leave the JavaScript u…
React: How to mock Auth0 for testing with Jest
I’m using React(react-create-app and TypeScript). Login is made with Auth0. I want to write tests with Jest, and I found this ressource which is basically the only thing around that speaks about Mocking the Auth0 object. So my code looks like this: But I end stuck with this error: Property ‘mockRe…
Get tests running time with Jest
Is there any way to know how long my tests take without doing it programmatically with Jest? To be clear, I know that if I add a variable to get the current time before each test and then log this when my test completes I’ll get this information, but I want this automatically, maybe with some Jest confi…
How to resolve “Animated: `useNativeDriver` is not supported because the native animated module is missing.” in react-navigation?
I am working on expo SDK Version: 36, and on all platforms (ios/android/web) When installing react-navigation for the first time as described in the documentation and running jest –watch while doing it, and the following warning appeared: It also happen in the browser console: Related issues: https://gi…
How To Get The URL After Redirecting from Current Page To Another Using Puppeteer?
I’m Aadarshvelu! Recently Started Testing My WebApp Code Using Jest With Puppeteer. So I Have Page Which All Credentials Have Been Filled With Puppeteer.But When SummitButton(‘signBtn’) Clicked POST process Starts Is There Any Test That Process POST Request?.. Or How Do I Know Test Has Been …
How to test if a component is rendered with the right props when using react-testing-library?
I have some components that are rendering another component (FetchNextPageButton) that is already tested in isolation, like these ones: The thing is that I’d not like having to add tests on each of these components for a functionality that is already tested somewhere else, so I think that should be enou…
How to test es6 default values in jest
How do you test the given default parameter value in jest? An example having the module: Or abit more complicated function module. Answer Each expected result of the test case is specified by us, that is, we have set the expected result in advance, whether the result actually returned by the test code is cons…