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

Prasana Bada

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 units and JavaScript. JavaScript code is written for each page of a website, or each module of an application is tightly coupled with back-end logic, and 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 powerful and easy-to-use JavaScript framework. The main purpose of QUnit is to make it easier to write unit tests in JavaScript. It does this by providing a simple and 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?

In the simplest case, it is a function that can influence a function that gives the same result for a given input. Unit testing is simple, but you’ll have to deal with side effects most of the time, which means DOM manipulation. It’s still helpful to understand what units we’ll build our code for and unit test accordingly.

Why QUnit testing? Fundamentals of QUnit Testing basics

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

QUnit is a user-friendly unit testing framework that provides custom declarations, main methods, callback events, asynchronous control, etc. QUnit has no dependencies and supports Node.js and all major web browsers. It was 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 to write and run tests. The following points below are its main features:

  • QUnit provides custom statements to test the expected results.
  • QUnit provides test props for performing tests.
  • Unit testing with QUnit tests allows you to write code faster, which raises 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 packages that contain test cases and other packages.
  • QUnit displays the progress of the test in a bar, glowing green if the test is successful and red if it fails.

Additional benefits of unit testing with QUnit

  • Tests enable refactoring
  • Tests improve design
  • Attribute Limiting Tests
  • Testing reduces the cost of change
  • Testing makes development faster
  • Tests reduce fear
  • Testing reduces bugs in existing features
  • Testing reduces bugs in new features

QUnit structure:

Where is it in ServiceNow?

In the Datacenter instance’s ServiceNow platform, navigate to u_cid_qunit_tests


Where can we find QUnit test results in ServiceNow?


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


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

QUnit includes much more to the supply chain, with specific support for testing asynchronous code such as timeouts, AJAX and events. The visual test runner provided by QUnit helps debug code by making it easy to re-run specific tests and providing stack traces for failed statements and caught exceptions.

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

About the author

Prasana Bada, Senior software engineer – QA, ServiceNOW

She has 9+ years of experience in IT services across quality engineering. Currently working as a senior software engineer – QA, ServiceNOW, her areas of expertise include automation testing and QUnit testing.

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

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