Test everything that could possibly break.Kent Beck
One of the conveniences of writing the tests first is that you have a solidified aim before starting to code.Kent Beck
It's time to refactor when we find ourselves passing the same types of data around in various places.Kent Beck
TDD also allows developers to have courage; courage to modify, to delete, and to add.Kent Beck
Results are not the point; the point is to learn as much as possible as quickly as possible.Kent Beck
The more tests, the more protected the software becomes.Kent Beck
Each test should make a unique contribution, otherwise, it's just wasted, confusing execution time.Kent Beck
You can view test-driven development as an iterative process of 'red, green, refactor'.Kent Beck
The propre act of writing a test is an concrete expression of your understanding.Kent Beck
Testing is a process of learning, learning about the behavior of the system, learning about its weaknesses.Kent Beck