When comparing QUnit vs tape, the Slant community recommends tape for most people. In the question“What are the best JavaScript unit testing frameworks?” tape is ranked 5th while QUnit is ranked 6th. The most important reason people chose tape is:
Very simple API that doesn't require globals, or monkey patching objects for assertions.
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Pros
Pro Tests run in the order they're added to the suite
In cases where you want (I know your test cases must be atomic) where you really really want your test cases to run in a specific order, maybe if the current one rely on those of previous case, you can use Qunit by setting QUnit.config.reorder = false and your test cases will run in the order you've provided.
Pro Works really well if performing DOM Testing
All frontend developers already know the ease that jQuery framework has brought to their lives, in handling DOM events and accessing elements. Since Qunit was built as a part of jquery (is even used by jQuery itself for unit testing) hence it makes testing of DOM elements a lot easier.
Pro Extremely easy to start from scratch
Seriously! All you have to do is include the Qunit library from the CDN, then create your Testcases js file, and RUN IT! . Your outputs would be displayed in a pretty little format in your browser.
Pro Simple API
Very simple API that doesn't require globals, or monkey patching objects for assertions.
Pro Built-in assert
This way you don't have to add more dependencies and external assertion libraries.
Pro No global functions
Tape does not use global methods such as "it", "describe", since they are not considered best practice in JavaScript.
Pro It follows the principles of TAP
TAP: Test Anything Protocol
Cons
Con Testing of Async operations can be a little tough at times.
Qunit, expects us to call the start() function before the Async function itself, and stop() after it stops. This can be a problem when you have no way of knowing, when your function will start or stop (your testing a number of dependent functions)
Con No concurrency
Cannot run async test cases concurrently for faster test builds.
