engineering-blog | π We write about our technologies and the problems | Frontend Framework library
kandi X-RAY | engineering-blog Summary
kandi X-RAY | engineering-blog Summary
π We write about our technologies and the problems we handle at scale.
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Answered 2020-Jun-20 at 05:26You may want to study the wrapper api, and setup for a custom render, but the gist is you create a test wrapper that provides the context provider for testing.
For example, I use react-intl so for testing I have a test utility intlWrapper
QUESTION
I am trying to test a React component using Enzyme. Tests worked fine until we converted the component to hooks. Now I am getting the error, "Error: Uncaught [TypeError: Cannot read property 'history' of undefined]"
I have already read through the following similar issues and wasn't able to solve it:
- React Jest/Enzyme Testing: useHistory Hook Breaks Test
- testing react component with enzyme
- Jest & Hooks : TypeError: Cannot read property 'Symbol(Symbol.iterator)' of undefined
Also this article: * https://medium.com/7shifts-engineering-blog/testing-usecontext-react-hook-with-enzyme-shallow-da062140fc83
Full component, AccessBarWithRouter.jsx:
...ANSWER
Answered 2020-Mar-04 at 21:22The problem here comes from inside of useHistory hook as you can imagine. The hook is designed to be used in consumers of a router provider. If you know the structure of Providers and Consumers, it'll make perfect sense to you that, here the consumer (useHistory) is trying to access some information from provider, which doesn't exist in your text case. There are two possible solutions:
Wrap your test case with a router
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