Flask Framework Cookbook - Second Edition

Determining test coverage

In the previous recipes, test case writing was covered, but there is an important aspect to testing called coverage. Coverage refers to how much of our code has been covered by the tests. The higher the percentage of coverage, the better the test (although high coverage is not the only criterion for good tests). In this recipe, we will check the code coverage of our application.

Remember that 100% test coverage does not mean that the code is flawless. However, in any case, it is better than having no tests or lower coverage. Anything that is not tested is broken.