How to write unit tests

The page introduces unit tests as a way to set explicit expectations about code. It frames testing as advice beginner programmers often hear and says the goal is to help you start doing it.

Reading notes

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• Unit tests are presented as a way to make expectations about code explicit.
• The page addresses beginner programmers who are told to test their code.
• The captured text is truncated before the explanation of how unit tests work continues.