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Jade’s Guide to QUnit Test and JavaScript Unit Testing Framework

Prasanna Bade
June 2, 2022

What is QUnit?

There will always be a hurdle in the software industry when we try to write unit tests for client-side codes due to the lack of any actual units and JavaScript. JavaScript code is written for every page of an internet site, or each module of an application is closely intermixed with back-end logic, and it is related to HTML. In the worst-case scenario, the code is mixed with HTML as inline event handlers.

With a market share of 0.05% and more than thirty-six companies using this software, QUnit is a robust, easy-to-use JavaScript framework. The primary goal of QUnit is to make it easier to write unit tests in JavaScript. It does this by providing a simple, easy-to-use API for unit testing. It works with any JavaScript codebase, not just those written in JavaScript syntax. It can also test any generic code, not just code that uses the jQuery library.

What is a Unit?

Within the simplest case, it is a function that can affect a function that gives the same result for a given input. Unit testing is straightforward, but you would need to deal with side effects most of the time, which means DOM manipulations. It is still helpful to figure out which units we will structure our code into and make unit tests accordingly.

Why QUnit Testing? Basics of QUnit Testing Fundamentals

QUnit is a powerful and easy-to-use JavaScript unit testing framework used by jQuery, jQuery UI, and jQuery Mobile projects and can test any generic JavaScript code.

QUnit is a user-friendly unit testing framework that provides customized Assertions, Main methods, Call back events, Asynchronous control, etc. QUnit has no dependencies and supports Node.js and all major web browsers. It had been initially developed for the jQuery project and has since evolved to test any client-side or server-side JavaScript code.

QUnit is an open-source unit testing framework used for writing and running tests. The following points provided below are its key features:

  • QUnit provides customized Assertions for testing expected results.
  • QUnit provides Test fixtures for executing tests.
  • Unit testing with QUnit tests allows you to write codes faster, which increases the standard.
  • QUnit is elegantly simple. It takes less time and is usually less complex.
  • QUnit tests are often run automatically, and they check their results and provide immediate feedback.
  • QUnit tests are often organized into test suites containing test cases and other suites.
  • QUnit shows the test progress in a bar, illuminating in green if the test is good and red if it fails.

Additional Benefits of Unit Testing with QUnit

  • Tests allow Refactoring
  • Tests improve Design
  • Tests constrain Features
  • Tests reduce the cost of change
  • Testing makes Development faster
  • Tests reduce fear
  • Tests reduce bugs in existing features
  • Tests reduce bugs in new features

Structure of QUnit:

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Where is it in ServiceNow?

In the ServiceNow platform of the Datacenter instance, navigate to u_cid_qunit_tests

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Where can we find QUnit test results in ServiceNow?

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If you are looking for a ServiceNow Automation test framework, then our blog can help you out. Please visit us at the following link to learn more: Guide to ServiceNow Automation Test Framework.

Conclusion

Testing JavaScript code is not just using some test runner and writing a couple of tests. It always requires some heavy structural changes when applied to codes tested manually.

QUnit features a lot more to the supply chain, with specific support for testing asynchronous code like timeouts, AJAX, and events. The visual test runner provided by QUnit helps debug codes by making it easy to rerun specific tests and provides stack traces for failed assertions and caught exceptions.

For more information, please click on the following link:  Contact Us | Jade Global

About the Author

Prasanna Bade, Senior Software Engineer- QA, ServiceNOW

She has 9+ years of experience in IT Services across Quality Engineering. Currently working as Senior Software Engineer- QA, ServiceNOW Her areas of expertise include Automation Testing and QUnit Testing.