API Design for Testability

Roy Osherove, Team Agile

Many who try to unit test their applications-whether using agile or traditional methods-quickly find that doing a thorough job can be difficult if the code was not designed with testability in mind. Roy Osherove describes dependency injection methods for designing APIs so that they are easier to test. He explains how design patterns can help and how to implement applications with interface-based programming. Roy shares his insight on what "evolving a design" really means in the context of test-driven development. For those who are living with legacy code, he discusses special techniques for managing and implementing unit testing. In addition, Roy discusses the build life cycle and how continuous integration fits into the mix.

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