What is meant by the term "test coverage"?

The term "test coverage" specifically refers to the extent to which application code is tested. This not only encompasses the percentage of the code that has been executed during testing but also the various types of tests that have been applied to different segments of the application, such as unit tests, integration tests, and acceptance tests. High test coverage suggests that most of the code paths have been tested, which increases confidence that the application behaves as expected in various scenarios.

In contrast, measuring the total number of tests developed relates to the volume of tests rather than their effectiveness in covering the actual codebase, thus lacking a direct correlation with quality assurance. Verifying test results is an entirely different process that focuses on comparing the outcome of tests against expected results, rather than assessing how much of the code has been tested. Additionally, documenting test cases is about creating detailed descriptions of tests to be performed but does not measure the effectiveness of those tests in covering the application code.