Unit testing principles

During this talk, you'll learn about the characteristics of a good unit test — a coordinate system that will allow you to evaluate any test and distinguish good tests from bad ones. After that, we'll talk about how to improve the quality of the tests and what patterns can be used during refactoring. And also address the mocks topic, like why the database shouldn't be mocked and how the London and classical schools of unit testing differ in their approaches to mocking.