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Backend Development
What are the best JavaScript unit testing frameworks for backend code?
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Best JavaScript unit testing frameworks for backend code
Price
Last Updated
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Mocha
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May 2, 2016
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Jasmine
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Jan 4, 2019
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QUnit
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Jan 3, 2019
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Mocha
My Rec
ommendation
for
Mocha
My Recommendation for
Mocha
All
6
Pros
5
Cons
1
Top
Pro
•••
Easy to add support for Generators
Aside from the numerous benefits with generators in your application, You can now also integrate generators into your test suite. By using mocha, all you have to do is enable support for generators.
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Con
•••
Can be intimidating for beginners
While some testing frameworks are complete out of the box, Mocha requires developers to select and set up assertion libraries and mocking utilities. For someone who is just starting to learn how to build tests this can be scary as they will also have to choose which libraries to use and learn them too.
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Pro
•••
Custom full color test reporters
Mocha has multiple test reporters built in and you can create your own as well. The test reporters have full color and makes it easy to see if your tests fail or not.
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Pro
•••
Makes Asynchronous testing extremely easy
No need to write tricky statements for Async testing. Mocha gives you a done callback. Place this done parameter in your callback function, that'll let Mocha know that you've written an asynchronous function.
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Pro
•••
Write tests with Behavior Driven Development (BDD)
Allows developers to choose their development process. Not only TDD but also BDD.
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Pro
•••
Supports different assertion libraries
Mocha runs independently from the assertion library, so you can choose which assertion format works best for you. Mocha most often is run in combination with assertion library Chai.
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2
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Jasmine
My Rec
ommendation
for
Jasmine
My Recommendation for
Jasmine
All
3
Pros
2
Cons
1
Top
Pro
•••
Behaviour Driven Development focused
If you prefer your test cases and application to be developed from the perspective of your stake holders, Jasmine is the framework for you.
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Con
•••
Not much room for flexibility
Jasmine comes with everything already baked in (including assertion libraries and mocking utilities). While this is great for beginners and people who don't want to spend much time looking into different libraries and tools it can be a turnoff for anyone who wants to use a different assertion and/or mocking library.
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Pro
•••
Has a very readable and user-friendly syntax
Code readability is an important factor, if the application development involves multiple teams; if the testing team is unable to read your test cases then they won't be able to test it. Jasmine resolves this issue by providing developers with an extremely simple and "human-friendly" syntax. EditComment References 1
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QUnit
My Rec
ommendation
for
QUnit
My Recommendation for
QUnit
All
4
Pros
2
Cons
2
Top
Pro
•••
Extremely easy to start from scratch
All you have to do is to include the QUnit library either from the CDN or from the local server and then create your tesctases.js file and run it. The outputs will be displayed in a nice format in the browser.
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Con
•••
Testing of Async operations can be a little tough at times
QUnit expects you to call start() before an async function and stop() once it has stopped. This can be problematic when you have no way of knowing when exactly your function will start or stop.
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Pro
•••
Tests run in the order they're added to the suite
If you want your tests to run in the order you have provided (maybe if your tests are ordered in such a way that your current test relies on the previous one), you can do so by setting QUnit.config.reorder = false and the tests will run in the order that you have provided.
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Con
•••
Doesn't support source maps
QUnit has no support for sourcemaps.
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