test driven development
Test-driven development as a defect-reduction practice
… Engineering, 2003. ISSRE …, 2003
. While legacy product unit testing was an ad-hoc process, primarily manually, the new project
benefited from automation of unit test-cases since they could be used as part of the FVT regression
test-suite. .  K. Beck, Test Driven Development: By Example: Addison Wesley, 2002.