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jest | berry | |
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473 | 181 | |
43,529 | 7,087 | |
0.4% | 1.4% | |
9.6 | 9.3 | |
10 days ago | 5 days ago | |
TypeScript | TypeScript | |
MIT License | BSD 2-clause "Simplified" 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
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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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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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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.
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13 best React debugging tools
Jest is a well-regarded JavaScript testing framework primarily designed for React applications, although its utility extends to projects using Babel, JavaScript, Node, Angular, and Vue. Created by Facebook, Jest emphasizes ensuring the correctness of JavaScript codebases. It allows developers to write tests with a familiar, feature-rich API, making the testing process swift and enjoyable.
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Dissecting the hell that is Jest setup with ESM and Typescript
SimenB. "Support ESM versions of all pluggable modules" Mar 7, 2021
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Migrating from Jest to Vitest for your React Application
Are you looking to migrate from Jest to Vitest for your React application? Look no further.
berry
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Understanding Dependencies in Programming
Node.js manages dependencies using package managers like npm (Node Package Manager), yarn, and pnpm. npm comes pre-installed with Node.js and allows you to install and uninstall Node.js packages. It uses a package.json file to keep track of which packages your project depends on. Yarn and Pnpm are alternative package managers that aim to improve on npm in various ways, such as improved performance and better lock file format.
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Run a Linux Distro in your Android device
Depending on the stack of the repository you are cloning, you might have to install additional dependencies. For this demo, I'm using my own website, which is a static website built with Astro.js. It which requires to have Node.js installed and Yarn for package manager.
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Unit Testing in Node.js and TypeScript: A Comprehensive Guide with Jest Integration
A package manager such as npm, Yarn, or pnpm. A package manager is a tool that helps you manage the dependencies of your project. You can use any of these package managers to install Jest and other packages.
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Guide to ChatGPT API Implementation for Developers
To start off, you'll need Node.js installed on your local system. This ChatGPT API guide will use Yarn to install dependencies in the project, but you're free to use npm or any other package management tool if you wish. Finally, you'll need an OpenAI account for ChatGPT API access.
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Consuming Loki logs with Grafana API and Node.js
This package is available in the Node Package Repository and can be easily installed with npm or yarn
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How to Build an Electronic Commerce Store with Medusajs
Yarn or Npm(This tutorial uses Yarn)
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How to secure JavaScript applications right from the CLI
However, the easiest way to install the Snyk CLI for your JavaScript application is to do so using the npm or Yarn global installation since you most likely already have Node.js installed. Ensure you're using Node.js version 12 or later and run the following command to install the Snyk CLI as a global npm package:
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Package manager wars. The real picture
Resolving berry to a url... Downloading https://github.com/yarnpkg/berry/raw/master/packages/berry-cli/bin/berry.js... Saving it into /private/tmp/my-app/.yarn/releases/yarn-berry.js... Updating /private/tmp/my-app/.yarnrc... Done!
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Security Analysis with JupiterOne’s Starbase and Memgraph
Installed Yarn package manager.
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Using Prolog in Windows NT Network Configuration (1996)
I think Prolog really shines as an embedded query engine (I know this is old and it's been removed since). It's perfect for declarative configuration, very easy to write powerful queries once you wrap your head around it.
The Yarn constraints plugin also used (Tau) Prolog, although it looks like it's in the process of being replaced with JS, which makes me a bit sad. The reasoning is here: https://github.com/yarnpkg/berry/issues/1276. Seems like the biggest issue is lack of a nice dev environment. I maintain the Trealla Prolog Wasm port (npm package 'trealla') and I hope some day to use it for a VSCode extension or LSP or something to provide a nice dev experience. Performance has also been cited as an issue[1] but Trealla is quite fast and I expect it could easily handle a complex Yarn workspace with tons of facts. If this sounds like something you'd be interested in helping me with, feel free to contact me or make an issue/discussion here: https://github.com/guregu/trealla-js
[1]: https://github.com/yarnpkg/berry/issues/4079#issuecomment-10...
What are some alternatives?
tap - Test Anything Protocol tools for node
vitest - Next generation testing framework powered by Vite.
Cucumber.js - Cucumber for JavaScript
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 🚀
yarn - The 1.x line is frozen - features and bugfixes now happen on https://github.com/yarnpkg/berry
nightwatch - Integrated end-to-end testing framework written in Node.js and using W3C Webdriver API. Developed at @browserstack
istanbul - Yet another JS code coverage tool that computes statement, line, function and branch coverage with module loader hooks to transparently add coverage when running tests. Supports all JS coverage use cases including unit tests, server side functional tests and browser tests. Built for scale.
mocha - ☕️ simple, flexible, fun javascript test framework for node.js & the browser
Cypress - Fast, easy and reliable testing for anything that runs in a browser.