A brief interlude on testing

Before we move on, we need to visit a topic we've not discussed yet, that being testing. Anyone who has been in the industry for a while has likely heard the term Test-Driven Development (or TDD for short). It's an approach to software development that posits that the first thing that should be written is a test, which will fail (since there's no code to run), then the code should be written that makes the test green, a reference to the green indicator given in IDEs and other tools to indicate that the test has passed. This process repeats as many times as necessary to build the final system, always making changes in small increments, and always starting with a test. A myriad of books have been written on the ...

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