A source line is considered covered when at least one instruction that is assigned to this line has been executed by a test case. These lines were not executed during any of the test cases.
Test code has lines of code that were never executed during the test. This can happen when you've written test for some application logic which is never hit during the tests.
Test code does not cover certain branches, indicating that there are no tests written for those specific branching conditions. This can lead to potential bugs or unexpected behavior going unnoticed, as the untested branches may contain logic that has not been verified. It is important to ensure that all branches in the code are covered by tests to guarantee proper functionality and identify any issues that may arise. Review the code and add tests for the untested branches to increase test coverage.