jest-light-runner
jest
jest-light-runner | jest | |
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1 | 474 | |
222 | 43,616 | |
- | 0.3% | |
6.1 | 9.5 | |
5 months ago | 5 days ago | |
JavaScript | TypeScript | |
MIT License | MIT License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
jest-light-runner
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Meta Is Transferring Jest to the OpenJS Foundation
Hi! Christoph from Jest here. Your feedback is great, and 100% valid. Jest was built a long time ago when ES modules did not exist, and we are still carrying some of that legacy baggage around.
The good news is that we have never been shy about making breaking changes and we are working on cleaning the house and making many legacy components optional, all while bringing the existing community with us.
As for mocking, you don’t have to rely on Jest’s inbuilt mocking libraries and you can use the ones you like better.
If you care more about raw performance and ES module support and less about isolation, check out the jest-light-runner: https://github.com/nicolo-ribaudo/jest-light-runner
We also mentioned it in our Jest 28 blog post: https://jestjs.io/blog/2022/04/25/jest-28
I’m wondering if it’s time to consider taking a big step and making this runner the default, and give people the optionality of isolation. However, in my past experience at large companies (both first-hand and second-hand experience), the lack of isolation in tests led to major reliability problems with testing infrastructure. I’m still feeling like it’s the better default today, but maybe we should have a serious discussion about Jest’s next set of defaults.
jest
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How to Add Firebase Authentication To Your NodeJS App
There are several testing approaches you can take to ascertain the functionality of the auth API. One way would be to automate the testing using unit tests with tools like Jest and Supertest. Alternatively, you can make use of API clients like Postman or the Thunder Client VS Code extension to test the API.
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What is an Abstract Syntax Tree in Programming?
GitHub | Website
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Top 10 Tools Every React Developer Needs in 2024
Jest
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API Testing with Clerk and Express
you have selected a testing framework. In my case, it's Jest with Supertest
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JS Toolbox 2024: Bundlers and Test Frameworks
Jest, created and maintained by Facebook, is a JavaScript testing framework with a focus on simplicity. It is often recognized for its zero-configuration setup and seamless integration, especially with React applications, making it a favored choice for developers in both small-scale projects and large enterprise applications.
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Testing library for Node.js and React
Jest (https://jestjs.io/)
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Unit Testing Expo Apps With Jest
console.error Jest encountered an unexpected token Jest failed to parse a file. This happens e.g. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax. Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration. By default "node\_modules" folder is ignored by transformers. Here's what you can do: • If you are trying to use ECMAScript Modules, see https://jestjs.io/docs/ecmascript-modules for how to enable it. • If you are trying to use TypeScript, see https://jestjs.io/docs/getting-started#using-typescript • To have some of your "node\_modules" files transformed, you can specify a custom "transformIgnorePatterns" in your config. • If you need a custom transformation specify a "transform" option in your config. • If you simply want to mock your non-JS modules (e.g. binary assets) you can stub them out with the "moduleNameMapper" config option. You'll find more details and examples of these config options in the docs: https://jestjs.io/docs/configuration For information about custom transformations, see: https://jestjs.io/docs/code-transformation
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Easily create mock data for unit tests 🧪
Note: I will be using Jest as testing framework throughout the examples.
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Painless CLI integration testing
We use Jest Framework for testing. Jest is not a dogma, and, of course, in its place can be any other test runner, such as Mocha or Ava. Let's focus on tests. I'll provide a short example because I don’t want to waste your time. You can find the full version here. It's crucial to read the comments in the code below. Let's go!
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What is integration testing in UI/Front End?
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.
What are some alternatives?
es-pack-js - Build and test portable JavaScript/rustwasm 🦀 modules
tap - Test Anything Protocol tools for node
nextjs-vitest-example - Vitest unit test in Next.js project
vitest - Next generation testing framework powered by Vite.
tools - Unified developer tools for JavaScript, TypeScript, and the web
Cucumber.js - Cucumber for JavaScript
flow-for-vscode - Flow for Visual Studio Code
Sinon.JS - Test spies, stubs and mocks for JavaScript.
nyc - the Istanbul command line interface
WebdriverIO - Next-gen browser and mobile automation test framework for Node.js
ava - Node.js test runner that lets you develop with confidence 🚀
nightwatch - Integrated end-to-end testing framework written in Node.js and using W3C Webdriver API. Developed at @browserstack