15.4 Unit testing with the unittest module
The unittest module allows us to step beyond the examples used by doctest. Each test case can have one more scenario built as a subclass of the TestCase class. These use result checks that are more sophisticated than the literal text matching used by the doctest tool.
The unittest module also allows us to package tests outside docstrings. This can be helpful for tests for edge cases that might be too detailed to be helpful documentation. Often, doctest cases focus on the happy path – the most common use cases, where everything works as expected. We can use the unittest module to more easily define test cases that diverge from the happy path.
This recipe will show how we can use the unittest module to create more sophisticated tests.
15.4.1 Getting ready
It’s sometimes helpful to summarize a test following ideas behind the Gherkin language. In this test specification language...
