Summary
This chapter explained the unit testing strategy for the legacy code and new development. It covered the legacy code issues, refactored the legacy code, illustrated design for testability, described the TDD concepts and TDD life cycle, demonstrated TDD examples, and refactoring.
Now the reader should be able to write unit tests for legacy code, refactor the legacy code to improve the design of the existing code, and start writing simple, clean, and maintainable code that follows TDD, and refactor the code to improve its quality.
The next chapter covers the best practices of unit testing.
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