testing-library-docs VS Standard

18.react-testing-library

Jest has long been my favorite got to test runner when it comes to UI unit and integration testing. With tools like React Testing Library (Testing Library framework for React) you get the benefit of very easy to write and maintain tests, as well as a quick and efficient way to run our tests.

I'm writing an intergration test with Testing Library where I'm on a boards dashboard area and a user can click a button to create an item on the board. I'm using an intercepting route to do show the popup form. Once finished the user goes back to their area and should see the created board.

This article uses Jest and React Testing Library. It's okay if you want to use other libraries, the fundamentals in this article will help you there as well.

This is the idea behind Testing-Library from what I understand.

https://testing-library.com/

The Testing Library: The Testing Library offers guidance on best practices for testing user interfaces effectively, with a focus on user-centric testing.

There are great tools like Testing Library that render a single component in a single state and then programmatically inspect the resulting DOM. However, the salient details of the rendered HTML – like color, layout, and scale – are hard to express. So, the tests end up brittle (over-specified) or insufficient (under-specified).

LiveCodes provides many of the commonly used developer tools. These include Monaco editor (that powers VS Code), Prettier, Emmet, Vim/Emacs modes, Babel, TypeScript, SCSS, Less, PostCSS, Jest and Testing Library, among others. All these tools run seamlessly in the browser without any installations or configurations. It feels like a very light-weight version of your own local development environment including the keyboard shortcuts, IntelliSense and code navigation features.

As I've been writing this series, I realized it's an ode to the magic of Testing Library, which is built for testing UIs as a user would experience an app. This principle means Testing Library is not introduced to your UI until after it has already rendered...which means Testing Library is navigating a DOM just as a user would...and users do not know or care what framework you used to build your UI, just that it works as expected.

I picked up standard[1] a while back for this reason, I don't want to have to think about it. It works fine, I have no complaints (took me a while to get used to not using semi-colons but now I prefer it) Same reason I use `cargo fmt` as well.

[1] https://standardjs.com/

# question 1: ? How would you like to use ESLint? … To check syntax only To check syntax and find problems ❯ To check syntax, find problems, and enforce code style # question 2: ? What type of modules does your project use? … ❯ JavaScript modules (import/export) CommonJS (require/exports) None of these # question 3: ? Which framework does your project use? … ❯ React Vue.js None of these # question 4 (select "No", because we won't add TypeScript support for this project): ? Does your project use TypeScript? › No / Yes # question 5: ? Where does your code run? … Browser ✔ Node # question 6: ? How would you like to define a style for your project? … ❯ Use a popular style guide Answer questions about your style Inspect your JavaScript file(s) # question 7 (we'll rely on Airbnb's JavaScript style guide here): ? Which style guide do you want to follow? … ❯ Airbnb: https://github.com/airbnb/javascript Standard: https://github.com/standard/standard Google: https://github.com/google/eslint-config-google # question 8: ? What format do you want your config file to be in? … JavaScript YAML ❯ JSON # the final prompt here is where eslint will ask you if you want to install all the necessary dependencies. Select "Yes" and hit enter: Checking peerDependencies of eslint-config-airbnb@latest The config that you have selected requires the following dependencies: eslint-plugin-react@^7.21.5 eslint-config-airbnb@latest eslint@^5.16.0 || ^6.8.0 || ^7.2.0 eslint-plugin-import@^2.22.1 eslint-plugin-jsx-a11y@^6.4.1 eslint-plugin-react-hooks@^4 || ^3 || ^2.3.0 || ^1.7.0 ? Would you like to install them now with npm? › No / Yes

A Thin JavaScript Document Storage with Middleware Stack

https://github.com/standard/standard/issues/384

For example, if you use https://standardjs.com/ - it will error on your second code snippet and if you ask it for an autofix - it will transfer the minus sign to the first line.

In comparison, JavaScript doesn't have a strict coding standard, although it does have widely accepted code style guides like the Airbnb JavaScript Style Guide and the JavaScript Standard Style. These guides provide recommendations for code formatting and naming conventions, but they are not as strictly enforced as the Java coding standard.