React Testing Library Cheat Sheet

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The testing-library recommended configuration doesn’t have many rules, so I’ve enabled a few more, that match our code base. Unfortunately, there aren’t many fixable rules. Modern React testing, part 1: best practices; Modern React testing, part 3: Jest and React Testing Library; Jest cheat sheet. React Cheat Sheet React Podcast React Podcast landing page. For more advanced React users, who just want to relax while still learning something new, the React Podcast might be a way to go. While not a learning resource pre-se, the podcast can help you get a better grasp of the React and overall web dev ecosystem, as well as an overview of. Testing in React, Part 6: Real-World Testing with React Testing Library, Jest, Enzyme and Cypress The headline for React Testing Library is, “Test functionality, not implementation”. The idea behind this concept is that implementation is constantly being iterated and improved upon, and therefore is unreliable as a means of testing a UX.

Why React Testing Library Practical Cheatsheet?

When it comes to testing React apps, if you google you’ll find so much info about the topic.

Well as above mentioned thins of react cheat sheet will help you creating your project quicker, there is other option also available, which can save your time. Reactjs Templates are always best to learn as well as to use in your react project to make it complete faster. It gives you many ready to use and well designed components, which will.

But all the articles, courses and any material that talks about the argument, are lacking one thing: explaining how to think about testing from a practical point of view!

There is so much about unit test, integration test, end-to-end test etc.

They explain quite well how to implement testing in your React app.

But what they don’t tell you, just because for every advanced developer who uses test is so obvious that he doesn’t think is even needed, is how to picture your testing strategy.

Maybe I don’t explain myself quite well, so let’s see in practice.

What do we need to test first of all in a React app?

Dom testing library

Well, leaving apart unit testing, we usually test if the components are there when the app renders.

We test also if the expected behavior is the one our app is suppose to have when faced with the user interactions.

So, we must first of all, the most important, is to find out how the components and the elements in charge with the behavior have to be selected.

Because we need to have them in the test units if we want to see if them renders or have the expected behavior.

Once selected, we can test a lot of things.

We test is them are there when suppose to be there in first palace.

For example, if a component is there, if a text is there, if some HTML element is there, if a value is there etc.

If an element is there, a text or a component for example, we can assert that the app is working correctly and there are no errors, is it?

After making sure the elements are there, we can test the user interaction or/and how the app interacts with external data (data fetched from back-end for example). Download cod4 mod tools patch free.

So here we go with a practical cheat sheet for React Testing Library.

The elements in the lists below allows us to select components or HTML elements and make assertion about them.

I made this list for my own use but then I thought to put it nice in an article and so make it easy for me to find it quick when I need it but also available to everyone else interested!

#.1 Selections

##If the Text, Label, Role, Alt, Value, Placeholder ARE there – positive assertion

  • getByText
  • getByRole
  • getByLabelText
  • getByPlaceholderText
  • getByAltText
  • getByDisplayValue

##If the Text, Label, Role, Alt, Value, Placeholder AREN’T there - negative assertion

  • queryByText
  • queryByRole
  • queryByLabelText
  • queryByPlaceholderText
  • queryByAltText
  • queryByDisplayValue
Testing

##If the Text, Label Role, Alt, Value, Placeholder WILL BE there – asynchronous assertion. Usually use await in front of this assertions

  • findByText
  • ByRole
  • ByLabelText
  • ByPlaceholderText
  • ByAltText
  • ByDisplayValue

##If there are MORE THAN ONE Text, Label, Role, Value, Placeholder in the rendered DOM, use All

  • getAllBy
  • queryAllBy
  • findAllBy

#.2 Assertive Functions

  • toBeDisabled
  • toBeEnabled
  • toBeEmpty
  • toBeEmptyDOMElement
  • toBeInTheDocument
  • toBeInvalid
  • toBeRequired
  • toBeValid
  • toBeVisible
  • toContainElement
  • toContainHTML
  • toHaveAttribute
  • toHaveClass
  • toHaveFocus
  • toHaveFormValues
  • toHaveStyle
  • toHaveTextContent
  • toHaveValue
  • toHaveDisplayValue
  • toBeChecked
  • toBePartiallyChecked
  • toHaveDescription

.3 Fire Event to test user interaction (reference: testing-library.com/docs/guide-events, testing-library/dom)

  • userEvent.type as a replacer for all the below

  • fireEvent.mouseOver(element)

  • fireEvent.mouseMove(element)

  • fireEvent.mouseDown(element)

  • element.focus() (if that element is focusable)

  • fireEvent.mouseUp(element)

  • fireEvent.click(element)

React Testing Library Cheat Sheet

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 Getbytext

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)