Unit Testing is overrated

Unit testing is a popular approach for testing software, but mostly for the wrong reasons. It’s often touted as an effective way for developers to test their code while also enforcing best design practices, however many find it encumbering and superficial.

It’s important to understand that development testing does not equate to unit testing. The primary goal is not to write tests which are as isolated as possible, but rather to gain confidence that the code works according to its functional requirements. And there are better ways to achieve that.

Writing high-level tests that are driven by user behavior will provide you with much higher return on investment in the long run, and it isn’t as hard as it seems. Find an approach that makes the most sense for your project and stick to it.

Here are the main insights:

Think critically and challenge best practices
Don’t rely on the test pyramid
Separate tests by functionality, rather than by classes, modules, or scope
Aim for the highest level of integration while maintaining reasonable speed and cost
Avoid sacrificing software design for testability
Consider mocking only as a last resort

There are also other great articles about alternative testing approaches in modern software development. These are the ones I’ve personally found really interesting:

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