React Testing Library Cheat Sheet

To help you remember all the details I ceated a one-page React Testing Library cheat sheet with all the tips (+ more) and a list of resources that you can get at the end of this post. Before we have a look at the application let's start with a broader look at testing React apps in general.

Npm Testing Library React
React Testing Library Cheat Sheet Answers
React Testing Library Queries
React Testing Library Cheat Sheet Printable
React Testing Library Cheat Sheet Download

React(is a JavaScript library for building user interfaces. This guide targets React v15 to v16. Jest is a popular choice when writing test cases for React Native. You can learn more about React Native testing with Jest from here. Useful links and references. Here’s the documentation to get started with the Jest testing framework. Here’s a case study on automating UI/integration tests with Flutter Driver and Codemagic. The React Testing Library is a very lightweight solution for testing React components. It provides light utility functions on top of react-dom and react-dom/test-utils, in a way that encourages better testing.

A short guide to all the exported functions in Vue Testing Library.

Queries#

Difference from DOM Testing Library

The queries returned from render in Vue Testing Library are the same asDOM Testing Library. Yet, they have the first argument bound to thedocument, so instead of getByText(node, 'text') you writegetByText('text').

Search variants#

Return if no match	Return if 1 match	Return if 1+ match	Await?
getBy..	throw	return	throw	No
findBy..	throw	return	throw	Yes
queryBy..	`null`	return	throw	No
getAllBy..	throw	array	array	No
findAllBy..	throw	array	array	Yes
queryAllBy..	`[]`	array	array	No

Search types#

finds by..	DOM example
..ByLabelText	label or aria-label content	`<label for='element' />`
..ByPlaceholderText	input placeholder value	`<input placeholder='name' />`
..ByText	element text content	`<p>Lorem ipsum</p>`
..ByDisplayValue	form element current value	Current value of input element
..ByAltText	img alt attribute	`<img alt='movie poster' />`
..ByTitle	title attribute or svg title tag	`<span />` or `<title />`
..ByRole	ARIA role	`<div />`
..ByTestId	data-testid attribute	`<div />`

You can write any combination of Search variants and Search types.

An example#

getByLabelText('Username') will search for a <label> element that containsthe string 'Username', and will return the associated input. In case of notfinding any, or finding more than one, it will throw an error.

queryAllByRole('nav') will synchronously look for all elements with arole='nav' attribute, and return an array with the results (or an empty arrayif no results were found).

Fcpx auto duck free download. For more information, seeWhich query should I use?.

Async utilities#

waitFor (Promise) retry function within until it stops throwing or timesout.
waitForElement (Promise) retry function or array of functions and returnthe result.
findBy and findAllBy queries are async and retry until either a timeout orif the query returns successfully; they wrap waitForElement.

Npm Testing Library React

For more information, seeDOM Testing Library Async API.

Remember to await or .then() the result of async functions in your tests!

Firing events#

fireEvent() trigger DOM event: fireEvent(node, event)
fireEvent.* helpers for default event types
- clickfireEvent.click(node)
- inputfireEvent.input(node, event)

Through the wall letter box. For more information, see Events API

Difference from DOM Testing Library Mayans mc sky go.

The events returned from Vue Testing Library are all async, so you shouldawait or then() the result.

VTL also exposes fireEvent.update(node, value) event to deal with v-model.See the API for more details.

Other#

within(node) takes a node and returns an object with all the queries boundto it: within(getByTestId('global-header')).getByText('hello').
configure(config) change global options:configure({testIdAttribute: 'my-test-id'}).

For more information, seeQuerying Within Elements andConfig API.

Text Match Options#

Given the following HTML:

All these matchers will find the element:

React Testing Library Cheat Sheet Answers

getByText('Hello World')// full string match

getByText('llo Worl',{ exact:false})// substring match

getByText('hello world',{ exact:false})// ignore case

React Testing Library Queries

// Matching a regex:

getByText(/world/i)// substring match, ignore case

getByText(/^hello world$/i)// full string match, ignore case

getByText((content, element)=> content.startsWith('Hello'))

ReactJs a popular web framework in recent days is a JavaScript library to build User Interface, ReactJs.org shares that this framework can be used in the developing in the single page application or mobile application. The top features of ReactJS, as listed down and highlighted in the official ReactJS website, is Declarative, Component-Based and Learn Once, Write Anywhere.

React Testing Library Cheat Sheet Printable

ReactJS cheat sheet below is an expert-designed by the experienced developer from Credo Systemz. This cheat sheet will help you to have a quick glance on the ReactJS components.

React Testing Library Cheat Sheet Download

Useful Link: ReactJS Course Content (Latest Updated)