Test-Driven Java Development, Second Edition - Second Edition

Processes

TDD processes are the core set of practices. Successful implementation of TDD depends on practices described in this section.

Write a test before writing the implementation code. Benefits: It ensures that testable code is written; it ensures that every line of code gets tests written for it.

By writing or modifying the test first, the developer is focused on requirements before starting to work on the implementation code. This is the main difference compared to writing tests after the implementation is done. The additional benefit is that with the tests written first, we are avoiding the danger that the tests work as quality checking (QC) instead of quality assurance (QA). We're trying to ensure that quality is built in, as opposed ...