Is that really true though? Comprehensive test coverage will definitely give the new programmers confidence, but is it justified? Are there really that many s

Is that really true though? Comprehensive test coverage will definitely give the new programmers confidence, but is it justified? Are there really that many software projects where lots of tests instills confidence that changes won't break things? At the end of the day, unit tests or not - you have to understand the code you are working in. This means new programmers will not deliver features as fast as those who have been working on the project for a while. They are going to need to learn the code base regardless of whether it has tests or not.