As with many things available in JavaScript, There are various options for how to test your unit code. To make it easier to save time while setting up your project, I’ve listed some of my top JavaScript testing tools to help with JavaScript Unit testing.
What exactly is unit testing within JS
JavaScript unit testing is similar to unit testing in other languages writing tests to demonstrate that your program does what you intended it to do in various ways. The general rule for testing software is: If the code has logic (that we created ourselves) and tests, it should be tested.
If you’re developing an application that requires an online experience, JavaScript will be an integral part of that application in some manner. Even if you think your business logic runs “mostly” on the backend, ignoring having a testing infrastructure for the JavaScript codebase is not a good idea.
Unit tests allow you to refactor your code more efficiently and help ensure quality codeIt’s easier to make changes with confidence with tests that confirm the behavior of an application or write tests to verify that you have solved a problem.
Top JavaScript Testing Tools
Jest
Jest is a JavaScript testing framework that advertises it as a zero-configuration framework for test parallelization and features such as snapshots that help save significant changes an easy task. Facebook managed Jest and was initially linked to testing for ReactJS users. Jest includes a wide range of built-in functions and is compatible with not just React but Vue, Angular, Node.js, TypeScript projects, and more.
Writing a test and making Jest aware is simple as calling the file “NAME.test.js” (the .test.js ending will be recognized in Jest). Jest’s API makes use of commonly used verbs and nouns in unit tests, and the difficulty you write included in your sum.test.js file might look something like this:
Other terms like using “describe” to group tests and using “it” rather than “test” use Jest straight out of the box. If you would prefer to use a style such as:
Jest is, without a doubt, the leading framework for JavaScript unit testing today. Switching to Jest from almost any other framework is easy because it works “as-is” with Jasmine, and code mods are readily available to transition from other applications.
Jasmine
Jest is based upon the work created by Jasmine, who utilizes a development taxonomy based on behavior in which you define the test suite and then create your own … ought to (or anticipate … in line with) expectations.
Jasmine comes with various packages that can be used in different environments, including Jasmine to Ruby, Jasmine to Python, and even an in-browser test run.
The Jasmine Jasmine standalone distribution from Jasmine can be used using browsers (via the HTML page, which loads your scripts, the test runner, and the test scripts). This is an ideal option if you use JavaScript unit testing and do not possess a npm/Node.js environment configuration.
Jasmine is a flexible choice across different testing tools and test runners, and the description format of tests makes them simple to understand (assuming you can write them correctly! ).
AVA
AVA is a test run-timer that works with Node.js and JavaScript in general. It’s simple and quick and produces a highly opinionated output, highlighting differences when tests fail. A difficulty using AVA comes with slightly different formats than Jest as well as Jasmine:
Other tools for testing
There are many JavaScript testing tools and frameworks in addition to these well-known options and a special mention of tape (which highlights its “TAP “Test Anything Protocol”). Also, there’s an alternative called the testing DOM Library. It isn’t a test runner or testing tool. However, it is a helpful tool for writing tests that test Web UIs using a variety of frameworks (or any framework at all).
JavaScript testing that goes beyond unit testing, Integration testing, and end-to-end testing with JavaScript are several exciting tools to check your program in addition to unit testing and beyond typical Selenium recommendations. For instance, QA Wolf creates Jestor Playwright test code for you by using your browser in your application!
These tools can aid you in starting with JavaScript unit testing. If we wish to guarantee the quality of our code for the client, we must be adamant about bringing the best methods for ensuring quality code. There are a lot of well-tested tools that can conduct JavaScript test units.