Understanding TDD

Now that we have seen what unit tests are and how they can help in development, we are going to learn about TDD.

In 1996, Kent Beck introduced a new software development methodology called Extreme Programming. The word Extreme indicates that the concepts behind Extreme Programming are totally different from the concepts used in software development back then. For many people, these concepts sound extreme even today.

The methodology is based on 12 rules or practices. One of the rules states that developers have to write unit tests and all parts of the software have to be thoroughly tested. All tests have to pass before the software (or a new feature) can be released to customers. The tests should be written before the production ...

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