Table of contents
Jest
Jest is a delightful JavaScript Testing Framework with a focus on simplicity.
As Jest is an open source project, you can find more
open source alternatives and stats
on LibHunt.
Easy Setup
Jest provides an out-of-the-box configuration which makes it easy to set up and start testing quickly without needing extensive configuration.
Snapshot Testing
Jest supports snapshot testing, allowing developers to capture the state of UI components, making regression testing easier.
Mocking Capabilities
Jest offers powerful mocking capabilities for functions, modules, and timers, enabling isolated and independent unit tests.
Parallel Test Execution
Jest runs tests in parallel, utilizing multiple workers to speed up test execution and improve performance.
Comprehensive Documentation
Jest has thorough and well-maintained documentation which helps developers easily understand and utilize its features.
Watch Mode
Jest has a watch mode feature that automatically re-runs tests when files are updated, improving development workflow.
Built-in Code Coverage
Jest provides built-in code coverage reports, giving developers insights into which parts of their code are covered by tests.
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Jest is considered a good choice for modern JavaScript development, particularly for projects involving React, due to its robustness, ease of use, and active community support. Its ability to run tests in parallel and produce detailed diagnostics contributes significantly to improving testing efficiency.
We have collected here some useful links to help you find out if Jest is good.
Check the traffic stats of Jest on SimilarWeb. The key metrics to look for are: monthly visits, average visit duration, pages per visit, and traffic by country. Moreoever, check the traffic sources. For example "Direct" traffic is a good sign.
Check the "Domain Rating" of Jest on Ahrefs. The domain rating is a measure of the strength of a website's backlink profile on a scale from 0 to 100. It shows the strength of Jest's backlink profile compared to the other websites. In most cases a domain rating of 60+ is considered good and 70+ is considered very good.
Check the "Domain Authority" of Jest on MOZ. A website's domain authority (DA) is a search engine ranking score that predicts how well a website will rank on search engine result pages (SERPs). It is based on a 100-point logarithmic scale, with higher scores corresponding to a greater likelihood of ranking. This is another useful metric to check if a website is good.
The latest comments about Jest on Reddit. This can help you find out how popualr the product is and what people think about it.
Jest for test results with emoji-level joy https://jestjs.io. - Source: dev.to / about 4 hours ago
Popular frameworks like Jest, Mocha, or JUnit provide everything you need for effective webhook unit testing, with mocking capabilities that let you simulate external dependencies. - Source: dev.to / about 2 months ago
Proactive testing is critical for catching bugs before they reach production. Comprehensive test suites—covering unit, integration, and UI scenarios—detect issues early in the Software Development Lifecycle (SDLC). Roman Surikov, Founder of Ronas IT, advises, “Ensure that [automated testing] covers various scenarios including unit, integration, and user interface testing to catch bugs early.” A 2024 Sauce Labs... - Source: dev.to / about 2 months ago
To maximize learning, I could choose something new. Normally, I consider that a valid reason. But given my limited time, that wasn't a priority for me. Another criterion could be long-term viability: Is there a large core team and an active community? Well, who still remembers AngularJS? From Google? And didn’t Facebook/Meta start Jest? I wouldn’t rely too much on that. - Source: dev.to / 2 months ago
Additionally, I wrote Jest and Enzyme unit tests to demonstrate how to go about unit testing the components, as test driven development (TDD) is another methodology my organization subscribes to. Jest is a unit testing framework that actually shipped with React if you use the Create React App CLI to make a new React project. And at the time, Enzyme was created by Airbnb and added additional functionality to Jest... - Source: dev.to / 3 months ago
Jest is a comprehensive testing framework developed by Facebook and is the default choice for testing React applications. It includes built-in capabilities for mocking, spying, and snapshot testing, ensuring minimal setup for testing even the most complex applications. Jest’s extensive support for parallel test execution and interactive features like coverage reporting and watch mode makes it highly efficient. - Source: dev.to / 3 months ago
After converting your components, take some time to test your application. Make sure everything is working as expected. React’s development server automatically reloads your application whenever you save changes, which makes testing a lot easier. Tools like Jest and React Testing Library are also available to help you write tests for your components. - Source: dev.to / 3 months ago
There are several tools available for unit testing in React JS. Two of the most popular are Jest and React Testing Library. - Source: dev.to / 3 months ago
To quote the Jest Core Team, "Jest is a JavaScript testing framework designed to ensure correctness of any JavaScript codebase." [1] Regarding software development, testing code provides a safety net that can prevent bugs and improve the code written. Setting up team workflows using Test Driven Development and Continuous Integration requires a reliable testing framework. Throughout this article, I will go over the... - Source: dev.to / 4 months ago
Testing your code shouldn't be a chore. Inspired by Jest and Bun's test runner, Query's built-in test suite makes testing seamless. With familiar functions like test, describe, and expect, writing and managing tests without extra tools is easy. - Source: dev.to / 5 months ago
Automated testing ensures your code works as intended and helps to mitigate against regressions. For web applications, tools like Jest for JavaScript or Cypress for end-to-end testing can save hours of debugging. - Source: dev.to / 6 months ago
Note, however, that off-the-shelf solutions rarely fit perfectly. So, you should think of how to tailor frameworks to your needs. For example, you can implement custom reporters in Jest to enhance your test output with tailored reporters. You could also implement extended assertions in Chai to add domain-specific assertions to your framework. - Source: dev.to / 6 months ago
We're not skimping on testing. Here's the trifecta: Vitest is faster than Jest and works with ES modules out of the box. React Testing Library is still great for component testing, helping you catch accessibility issues and test like a user would. For end-to-end testing, Playwright is awesome, handling multiple browsers, visual testing, network stuff, and mobile device emulation without the flaky tests. - Source: dev.to / 6 months ago
Apart from that, there is a lot of common ground regarding testing. All three contenders support the testing tools that many of you use and love, whether it is Jest, Jasmine, and Mocha for unit testing or Cypress, Playwright, and — of course — Selenium for end-to-end testing, among others. A shallow learning curve will be ahead if you want to use these testing tools. - Source: dev.to / 6 months ago
The example setup from the blog post was a React app tested with Puppeteer and Jest. That’s a great start … but what if I use Playwright instead of Puppeteer? Is it possible? - Source: dev.to / 7 months ago
Jest is a JavaScript testing framework created by Facebook and is the most common testing framework for React. Jest comes with built-in assertion functions, test runners, and mock capabilities, making it an excellent choice for testing React components. It's fast, easy to set up, and integrates seamlessly with other testing libraries. - Source: dev.to / 7 months ago
If you want to avoid bugs and prevent regressions, you need to write tests. Vitest is a great choice because it has the same API as the most popular framework, which is Jest, but it runs faster. - Source: dev.to / 7 months ago
On top of this, we'll also want to run tests on our source code. My project uses Jest, but again, you can use whatever testing framework you'd like. - Source: dev.to / 7 months ago
As a developer with a JavaScript background, I've spent a fair amount of time writing tests with Jest. In my project, gimme_readme, I had to play around with some experimental features with Node and Jest because of the 3rd party npm modules I was using. I was able to find great Stack Overflow threads that taught me how to run Jest tests when using ES6 syntax. Without the wisdom of these smart individuals, let's... - Source: dev.to / 7 months ago
To do this, I chose Jest because it is the most popular testing framework for JavaScript and it is a mature technology, meaning there is plenty of great documentation and examples and a large ecosystem around it. - Source: dev.to / 7 months ago
For more information, you can visit Jest’s official documentation: Jest. - Source: dev.to / 7 months ago
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Is Jest good? This is an informative page that will help you find out. Moreover, you can review and discuss Jest here. The primary details have not been verified within the last quarter, and they might be outdated. If you think we are missing something, please use the means on this page to comment or suggest changes. All reviews and comments are highly encouranged and appreciated as they help everyone in the community to make an informed choice. Please always be kind and objective when evaluating a product and sharing your opinion.
