A Few Practical Notes on Unit Testing

Points Worth Knowing

• The AAA pattern (Arrange, Act, Assert) is a common structure for writing clear, well-organized unit tests.
• Using mocks and stubs in unit tests lets you simulate external dependencies, like a database, instead of calling them for real.
• Code coverage percentage is a useful signal, but on its own it doesn't guarantee the quality of your tests.

Takeaway

None of these points are complicated on their own, but knowing them can lead to better technical decisions about Unit Testing on your next project.