TDD, when done correctly and appropriately, can give a good return on investment as it facilitates the development of self-testing code, which yields robust software applications with fewer or no bugs. This is because most of the bugs and issues that might appear in production would have been caught and fixed during the development stage.
Documenting the source code is a good coding practice, but in addition to source code documentation, tests are miniature documentations of the source code as they serve as a quick way to understand how a piece of code works. The test will show the expected input together with the expected output or outcomes. The structure of an application can be easily understood from the tests, as there ...
