I am having an error when I build my application in react. I noticed this error only when I tried to build application. When I stopped dev server and ran it again, it showed the same error. It seem...

I'm using React v15.4, babel-jest v18 and enzyme v2.5.1 I have a simple React Component: import React, {Component} from 'react' import {FormattedRelative} from 'react-intl' import pageWithIntl fr...

I have written this component. it fetchs data using hooks and state. Once it is fetched the loading state is changed to false and show the sidebar. I faced a problem with Jest and Enzyme, as it doe...

I am using Jest to test a React component written in TypeScript. I can't use .simulate() because that is being deprecated in favor of just directly calling the component's onClick() function prop. ...

I am trying to test a connected react component, however once wrapping it, I cannot get the instance of it using instance(), it returns null. for non-connected components it does return the instanc...

I am working on a React application and I want to test one module, let's call it B, that depends on another module, let's call it A. The scenario could be something like this: moduleA.js export ...

I am trying to test a react component using jest and enzyme. But whenever i try to mount the component, i am getting following error. Error: Uncaught [SecurityError: replaceState cannot update hi...

I have a component like that: <Parent> <Child/> </Parent> and <Child/> component have a method foo. I want test the foo method but I don't know how to access it. I tried...

I am Following both the Enzyme examples for .find() and this GitHub enzyme-example-jest example to get a basic component to test and verify the outer-most element className exists, I do not unders...

I want to test the 'canViewPage method in jest. How do mock the const userPages which is the values from the func getUserPage canViewPage(page){ const userPages = getUsersPages(); if(userPages....

I am trying to put url params under test using Enzyme of React Router. The application is simple so far. I have App.jsx that has a <Router /> component with a <Switch /> component and t...

so recently we updated ag-grid-react and ag-grid-community from 27.0.1 to 28.0.0 and previous working tests now fail. Test tries to get a value from a row cell and compares to the given one. Test (...

I have two micro frontends (written in react & typescript). dashboard MFE and Common MFE common MFE has several component which can be consumed by dashboard independently. eg. Notification comp...

I have multiple buttons on my page: <div> <h1>Home</h1> <button>Action 1</button> <button>Action 2</button> </div> How can I select the "Action...

I am trying to test a React component and make sure that when its button gets clicked, the correct method gets invoked. However, when I try to run my test and try to spy on that method, I get the f...

Yesterday I upgraded my React project to v16.0, but I found that Enzyme had some problems Error: Enzyme Internal Error: Enzyme expects an adapter to be configured, but found none. To configure...

I am trying to test a style attribute for a React component. What is the best way to get style params in the test? At this moment, my best option is to test if the HTML includes the string, but I ...

I'm relatively new to Jest and testing in general. I have a component with an input element: import * as React from "react"; export interface inputProps{ placeholder: string; className: string;...

I'm trying to write jest tests for my React component that has a dropdown like this: <select id="dropdown" onChange={this.handlechange} ref={this.refDropdown}> {this.props.items.map(item =&...

What is the difference between enzyme, ReactTestUtils and react-testing-library for react testing? The ReactTestUtils documentation says: ReactTestUtils makes it easy to test React components i...

I am using enzyme+mocha+chai to test my react-redux project. Enzyme provides shallow to test component behavior. But I didn't find a way to test the router. I am using react-router as below: <R...

I started newly writing unit test cases using Jest and Enzyme for the react application and when try to run test cases using jest like "test": "jest --watch" rather "test&q...

I am using Jest, Enzyme and Typescript, but for some reason certain imports are not working... they are undefined. For example, I have import ReactMarkdown from 'react-markdown'; in a file and when...

I have a React app, and I want to start writing unit tests with Enzyme. Enzyme's documentation discusses versions of React up to 16. In src/setupTests.js I currently have import Enzyme from 'enzyme...

I'm looking for help with unit tests for my app, where I'm using indexedDB. Before I implemented indexedDB functionality, tests were correct. But now, for all of them I see one error: ReferenceErro...