This exercise (video 2m 58s) shows a powerful way to run only a single test, or some subset of tests, by using the @tag decorator available in the TDDA library. This is useful for speeding up the test cycle and allowing you to focus on a single test, or a …

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This exercise (video 8m 54s) shows how to migrate a test from using pytest directly to the exploiting the referencetest capabilities in the TDDA library. (If you do not currently use pytest for writing tests, you might prefer the unittest-flavoured version of this exercise, since unittest is in Python's standard …

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