Testing tip for devs: Test behaviors, not methods.

A practical testing tip advocating for behavior-driven tests rather than method-driven tests. When tests map one-to-one with methods, they can bundle multiple behaviors together, making them harder to maintain and understand. Instead, each test should verify a single behavior independently. This approach keeps tests focused, resilient to change, and easier to extend as new behaviors are added — since the relationship between methods and behaviors is rarely one-to-one.