What parameters and metrics do you use to determine test coverage completeness in a project?

To assess test coverage completeness in an iOS project, the following parameters and metrics are usually used:

• Line Coverage: the percentage of code lines executed during tests.
• Function Coverage: the percentage of functions called during testing.
• Branch Coverage: the percentage of all possible branches (if/else, switch) tested.

In Xcode, you can use the built-in Code Coverage tool, which displays these metrics. Typically, a high coverage (e.g., >80%) is aimed for, but not only the quantity but also the quality of tests matters — coverage should include critical and complex parts of the code.

Example of enabling coverage in Xcode:

1. In the scheme settings, enable "Gather coverage data".
2. Run the tests.
3. View the coverage report in the test report.