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Questions tagged [jest-enzyme]

18 questions
3
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Jest TypeError: Cannot read property 'body' of null

I am writing jest test case for a component but I keep getting this error: /mnt/pinboard/webapp/node_modules/react-dom/cjs/react-dom.development.js:12056 throw error; ^ TypeError: Cannot read properties of null (reading 'body') …
Simran Bhake
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ReferenceError: TextEncoder is not defined jest, jest-enzyme

I'm trying to test react application with Jest and Enzyme (React v18, Jest v29.4.3, and Enzyme-adapter 16). The tests are simple as shown on the example below: jest.test.file: import React from 'react'; import Enzyme from 'enzyme'; import Adapter…
Moez Ben Rebah
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1 answer

TypeError: Cannot read property 'child' of undefined during mounting in enzyme unit tests

I need to mount a class component as I need to test all the components being rendered by it. But I think I am making some mistake in passing the props in it. This is my component: class Marketing extends PureComponent { constructor(props) { …
Gareema
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1 answer

Babel error while running Jest/Enzyme tests on React Native

After a huge package upgrade, when running Jest tests on our application, we have this error : TypeError: [BABEL] /home/grubshka/devel/project/src/engine/models/Hive.ts: Cannot add property 1, object is not extensible at Array.push () …
Grubshka
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1 answer

writing test case using jest-enzyme/react-testing library

I'm completely new to writing test cases.I'm trying to write test case using jest,enzyme/react-testing library.I'm unable to test this component,tets are failing .If anyone can help me to write the test for the below code .Thank you in advance... I…
Veda
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How to mock function in Jest for Functional component using Enzyme

I am trying to write a jest test for the functional component using enzyme. I am having a component inside that I am having a method which returns the jsx elements. Out of three elements two are dropdown elements. I need to write test for that two…
roshan26
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1 answer

How to achieve 100% in unit testcase writing for React native functional component?

I have tried to write test case using jest as matcher and React NativeTesting library as a test base. But I can't reach the 100% test coverage. I have tried to mock the use effect and use state hooks but I won't mock that still it's asking for to…
Balaji Govindaraj
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After update to react 18, enzyme library's mount function is throwing error - TypeError: Cannot read property '_reactInternals' of null

I have upgraded react from 17.0.2 to 18.2.0. I have also added enzyme adapter: https://github.com/cfaester/enzyme-adapter-react-18. However, the mount function in enzyme is throwing the error: TypeError: Cannot read property '_reactInternals' of…
Saad Farooq
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1 answer

Jest Enzyme: TypeError: Cannot read property 'getBoundingClientRect' of null

Can anyone help please: TypeError: Cannot read property 'getBoundingClientRect' of null. handleInformationIcon = (setIndex, index) => { this.setState({ TooltipCheck: !this.state.TooltipCheck, activeTooltip: setIndex }); const toolTipElement…
varsha94
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Unable to get success in react native jest test cases for Image and Image Background components while using local assets

I am writing test cases for ImageBackground and Image component in React native but the test cases is getting failed as I am using local assets. It is unable to fetch the location of the assets folder I guess. Can someone help me out with this…
Sonali Vishwakarma
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Enzyme: React DOM being updated after simulating a click, but not the resulting .html()

I wanted to share this puzzling behavior, as, googling, I've found problems which are similar but decidedly not the same. While I cannot share the exact code I can illustrate what I mean with the following…
DeadlyBacon
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I want to test click event on group of buttons . while adding into a loop it throws simulate is not a function ,

const buttons: IButton[] = [ { children: 'Back', variant: 'gray', onClick: mockCallBack }, { children: 'Skip Recommended', onClick: mockCallBack }, { children: 'Next', onClick: mockCallBack }, ]; getting this error : TypeError:…
Lokesh Garia
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Can i check multiple function call using jest/enzyme?

I have onchange callback(been called from child to parent) function in one of the component i was trying to simulate onchange function as shown but i am getting error as 'getchangeChecbox' is not a function childcomponent
R9102
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How to write unit tests for a function call in a div in enzyme and jest?

I have a function call in my react component. I need to write the unit tests for it. Here is my function definition: const renderError = () =>{ const {isError, errorMessage, errorFromWhere} = error; if(isError && errorFromWhere ===…
Gareema
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TypeError: Cannot read property 'showPrev' of undefined while writing unit test cases in enzyme

I am writing unit tests using jest and enzyme to test my functional component. I am just checking whether the div is getting rendered or not, but I get the error: TypeError: Cannot read property 'showPrev' of undefined Here is my component: …
Gareema
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