I am creating a list of menu items using React. I want to test that when a user clicks or presses enter on an item, the onSelect prop is called. Here is a simplified version of my component: Here is my test: When running the tests I get the following output: How can I test that onSelect was called when
Tag: react-testing-library
react – how to test a component if it has value prop
App.js Input.js I want to use jest and react-testing-library to test for the <Input> component. But I cannot figure out how to handle the value prop. This is the test file I’ve made, but I cannot go further. The test returns failed after I run it. Codesandbox https://codesandbox.io/s/affectionate-…
React Testing with history passed
Problem Statement I’m using create react app with Jest. In my test, I simply want to render out a component that needs history passed to the state before it can load. I’ve been researching and trying to get to this to work for awhile. The source I’ve been using shows how to pass the history …
MUI5 not working with jest – SyntaxError: Cannot use import statement outside a module
Reproducible repo: https://github.com/hutber/cannotusestatement What is more worrying is: https://codesandbox.io/s/vigilant-bartik-bmz8x in the sandbox the tests pass. However if you checkout the above repo, which was imported into this sandbox it will not pass locally. I have no doubt that the issue is my je…
Testing react components with redux-toolkit inside
I have a component like this: and am trying to test it. The problem is, I somehow need to mock the store, to match my case. Any ideas how I should handle this? I remember in my previous project I used a npm package to do this, but can’t find it now, and can’t remember how I did it, or
React Testing Library does not find elements using getAllByTestId after initial render
I have a very simple component where I am trying to simulate an API call to get some movies with a slight delay. I want to write a test which tests that the movies are gathered and then rendered to screen. I am trying to use screen.getAllByTestId to do this, however it always fails. It is as if it doesn’…
Jest: ReferenceError: global is not defined
So I am writing unit test using “react-testing-library” on Jest and I have this error: Answer After I added “jest-environment-jsdom”: “^27.0.6” as a dev dependency, that error went away.
Unit testing react redux thunk dispatches with jest and react testing library for “v: 16.13.1”,
I have following function. const loadUsers= () => { return async (dispatch) => { dispatch(userRequest()); let response= null try { response= await UserService.getUser(); dispatch(userLoading()); } catch (error) { dispatch(userError(error)); } finally { dispatch(userSuccess(response)); } }; }; With the f…
Preventing “not wrapped in act(…)” Jest warning when state update doesn’t affect UI
I’m trying to figure out if there is a way to prevent the “not wrapped in act(…)” warning thrown by Jest/testing-library when I have nothing to assert after the state update that causes the warning happens, or if I should just ignore this warning. Suppose I have this simple component: …
Next seo test with react testing library
I am trying to test my SEO component which looks like this: and my test is like so: however the test is failing: (it looks like the head element is empty) Answer I was having the same issue, but I found this answer on GitHub. So basically you need to mock next/head, pass document.head to the container propert…