Django REST API UNIT Testing | API TESTING In Django Rest Framework - English

Testing in Django and Django REST – Useful Tools and Best Practices:
If you are a developer, you already know how important testing is in any software project. In particular, automatic testing, as it can help you to corroborate your coding, and quickly see that your program does what you want it to do.

It also helps to corroborate any new changes in your code that didn’t break any previous functionalities.

In saying that, does this mean that if you have automatic tests then your project won’t have any errors? It does not. As computer scientist Edsger W. Dijkstra once said:

“Program testing can be used to show the presence of bugs, but never to show their absence”.

This phrase helps us to understand that we can’t be sure that a program is perfect, but, testing is fundamental to help us discover errors and make fixes and improvements.

As a person that works in software development, I can say that it’s a lot better when you discover an error rather than your client or a user in production.

In this article, I’ll talk about basic knowledge in automatic testing, useful tools, and good practices in Django projects, with a focus on API’s.
Testing in Django & Django REST Framework

Django has very nice documentation about testing, and Django REST Framework too. So, in this blog, I’ll talk about the main tools in those two frameworks, and what you can do and use to improve your testing.
Main Testing Classes

Django provides several classes for testing. The one I’ll talk about here is TestCase, which is very useful if your application uses databases.

As the name states, to create a test case in your Django project, you will define a class that inherits from TestCase.

By doing this, you can use all the methods and properties of the named class that will help you to create and execute your tests. Then you will define different functions that will correspond to each unit test inside the test case.

Let’s see an example of the structure of a test case:

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