Test-Driven Development
This lesson explains a software development methodology that focuses on unit testing.
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Test-driven development #
Test-driven development (TDD) is a software development methodology that prescribes writing unit tests before implementing functionality. In TDD, the focus is on unit testing. Coding is a secondary activity that makes the tests pass.
In accordance with TDD, the ordinal() function below can first be implemented intentionally incorrectly:
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