Which aspect is primary when determining test coverage?

Determining test coverage primarily revolves around the range of functionalities that are tested. Test coverage assesses how much of the application’s requirements and functionalities have been validated through testing. This includes evaluating all pathways through the application, ensuring that every critical feature has been subjected to various types of tests, such as functional, regression, and integration tests.

By focusing on the range of functionalities tested, a QA team can ensure that different user scenarios, edge cases, and potential failure points are adequately addressed. This direct correlation between the completeness of testing coverage and the assurance that the application behaves as expected in real-world conditions makes it the primary aspect in determining test coverage.

Other factors, while important in the testing process, do not directly measure how comprehensively the application has been validated. For example, time allocated for testing may influence how much testing can be done but does not inherently reflect the rigor of coverage achieved. Similarly, the technology stack and team skill set can impact how testing is done but do not directly relate to the extent of functionality examined in the testing phase. Thus, the range of functionalities tested emerges as the most critical factor in determining test coverage.