react-hooks-testing-library | 🐏 Simple and complete React hooks testing utilities | Frontend Utils library
kandi X-RAY | react-hooks-testing-library Summary
kandi X-RAY | react-hooks-testing-library Summary
Simple and complete React hooks testing utilities that encourage good testing practices.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of react-hooks-testing-library
react-hooks-testing-library Key Features
react-hooks-testing-library Examples and Code Snippets
Lines of Code : 14
License : No License
Copyimport { renderHook, act } from 'react-hooks-testing-library'
test('counter', async () => {
let count, increment, decrement
renderHook(() => ({count, increment, decrement} = counterStore()))
expect(count).toBe(0)
act(() => increme Community Discussions
Trending Discussions on react-hooks-testing-library
QUESTION
I am attempting to test a basic Axios hook and am receiving:
...ANSWER
Answered 2021-Nov-19 at 01:50Figured out my own issue. I had set global.window = {} in the jest.setup.js file earlier. @testing-library/react-native uses a timers.js file in which they refer to globalObj which they obtain from the following: const globalObj = typeof window === 'undefined' ? global : window;. As window was not technically undefined, globalObj was being set to {} and did not have access to global functionality.
QUESTION
I have a custom hook that takes a product id and toggles with value (boolean) and toggle as the returns. I'm trying to write a unit test for it, following the example here, but I'm getting TypeScript type-mismatch errors (the example I'm following isn't typescripted).
Custom Hook:
...ANSWER
Answered 2021-Nov-16 at 20:22You are returning an array. Therefor you have to destruct using [ value, toggleLike, toggleLike] and not { value, toggleLike}.
QUESTION
I using Firebase authentication and I would like to test the function using Jest and react-hooks-testing-library.
I have a function that like this:
...ANSWER
Answered 2021-Sep-11 at 07:55Finally I able to solve the problem by mock a function with will return promise that resolved with user like this:
QUESTION
I using Firebase auth in React, and I try to test it with react-hooks-testing-library. The code I write is working. But when I try to test with react-hooks-testing-library I get this error:
FirebaseError: Firebase: No Firebase App '[DEFAULT]' has been created , call Firebase App.initializeApp() (app/no-app).
Here is my actual code:
useAuth.tsx
...ANSWER
Answered 2021-Sep-01 at 16:50Solved this by mock it like this:
QUESTION
I have a React application created using create-react-app. I was testing something and created the following piece of code:
...ANSWER
Answered 2021-Apr-03 at 12:24This is happening because of React's Strict Mode.React's Strict Mode double invokes certain function in order to identify any unwanted side-effects in your app. You can read more about it here : React Strict Mode
Now, if you go to the index.js file of your app you will see that the App is wrapped by Strict Mode. Similar is the case of index.js file in codesandbox.
eg,
QUESTION
I am trying to write tests for this custom hook using react-hooks-testing-library.
...ANSWER
Answered 2021-Mar-26 at 07:40You need to use await before you call the deleteArticle method as it is an async call. Function will return nothin until it finished the execution of await deleteArticleById(articleId); so you need to wait until it gets executed.
QUESTION
I'm in the middle of trying to get as close to 100% unit test coverage with my React application as possible, however I'm in a bit of a pickle with trying to get test coverage on the useAsync hook. I took the following code from use react hooks:
ANSWER
Answered 2021-Jan-20 at 15:29Okay, so after much tinkering & googling, I found an answer to my problem, thankfully it's relatively straightforward! 😃 - The short answer being the use of waitFor.
I made a couple of other modifications, i.e. assigned the timeout delay to a variable called timeout, but nothing major.
QUESTION
So I'm pretty new to testing with react. I have a custom hook that I am calling inside a component. I am using the renderHook methods from react-hook-testing-library.
I need to test if the methods inside useEffect inside the custom hook are called. I cant seem to figure this out.
In another case, I need to figure out if trackPdpGtm is not called.
Note: The hook does not return any data. This is mainly for sending analytics information.
Current Approach:
usePdpGtm.js
...ANSWER
Answered 2021-Jan-14 at 08:42You forget to clear the mock.calls and mock.instances properties of trackPdpGtm function mock. That's why your second test case fails. You can use jest.clearAllMocks() to clear it in afterEach hook.
E.g.
usePdpGtm.ts:
QUESTION
I have a very simple hook that I want to publish to npm, and I'm struggling to see why I should compile my hook at all. Let me first provide some context.
My hook depends only upon React.useState and React.useEffect. The purpose of this hook is to be used with my existing library: https://npmjs.com/package/simple-shared-state. As you can see, there's very little to this hook:
ANSWER
Answered 2020-Jan-09 at 00:00You can publish ES6 code.
The current js spec is ES2020. All runtimes should support all features from this spec. Thus you need compile own code to latest standard. If user want to use your code on older runtimes(e.g. IE11) he can transpile all code in his build process.
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