By Jash Unadkat, Technical Content Writer at BrowserStack - October 23, 2019
Over the last few years, the programming landscape has changed drastically.
Key benefits of Mocha:
- Provides compatibility for both frontend and backend testing
- NodeJS debugger is supported which makes error tracing easier
- Accurate reporting
- Provides support for all browsers including the headless Chrome library
- Very convenient framework for the developers to write test cases
JEST is a highly preferred framework for applications based on React. It provides an unambiguous and very convenient user interface. This framework comes bundled with some interesting features like snapshot testing and a built-in tool for code coverage. There are also a lot of resources available online for JEST.
Key Benefits of JEST:
- Compatible with NodeJS, React, Angular, VueJS and other Babel based projects
- Standard syntax with documentation support
- Very fast and highly performant
- Managing tests with larger objects is possible using Live Snapshots
Jasmine is very beneficial for frontend testing. It includes both visibility testing as well as the responsiveness testing of UI across various devices with different resolutions. One can also automate user behavior with custom delay and wait time for simulating the actual user behavior.
Key Benefits of Jasmine:
- Provides small, clean and straightforward syntax for easy testing
- Does not require any Document Object Model (DOM)
- Provides support for both frontend and backend tests
- Ease in coding as the syntax used is very similar to a natural language
- Strong documentation and community support
Karma is another popular open-source productive testing environment. It allows a QA to perform tests for an application in different environments. Karma allows the application script to be executed on real browsers and devices like phones and tablets. Karma aims to provide a testing environment for developers wherein they don’t need to set up loads of configurations. Instead, they can just run the tests and get instant feedback.
Key benefits of using Karma:
- Supports integrations with top CI/CD tools like Jenkins, Travis, and Semaphore
- Tests on real devices and browsers are possible
- Provides support for headless environments like PhantomJS
- Supports remote testing directly from a terminal or IDE
- Is framework agnostic, which means one can describe tests with popular frameworks like Mocha, Jasmine. One can also write a simple adapter for a specific framework.
5. Puppeteer (Node Library)
Puppeteer is a Node library that provides a high-level API. This API is used to control Chrome or Chromium over the DevTools protocol. One of the major limitations of Puppeteer is the fact that it works only with Chrome and Chromium. The Puppeteer can be used for browser-specific applications like page structure tests, taking website screenshots, and more.
One can also crawl and capture pre-rendered content for Single Page Applications (SPA).
Additional benefits of Puppeteer include:
- Easy automating UI testing, form submission, and keyboard inputs
- Easy generation of screenshots and PDFs of webpages
- Support for testing chrome extensions
- One can easily diagnose performance issues on a site using the timeline trace. Although Puppeteer has been recently introduced in the testing landscape, it has already been adopted by developers in large numbers. The future for Puppeteer looks promising.