What approach is best for improving "test coverage"?

The best approach for improving "test coverage" is to analyze areas of the application that have not been tested. This strategy is effective because it allows testers to identify gaps in the testing efforts. By recognizing which parts of the application lack sufficient test cases, these areas can then be prioritized for coverage enhancements.

A thorough analysis helps ensure that critical portions of the codebase, including complex functionalities and edge cases, are adequately tested. This proactive approach directly contributes to the overall quality of the software by minimizing the risk of undetected bugs and vulnerabilities.

Focusing exclusively on unit tests, automatically generating all test cases, or concentrating solely on user interface tests may not effectively address areas that lack coverage. These methods can lead to an unbalanced testing strategy, which might overlook essential parts of the application that require attention. Thus, a comprehensive coverage improvement plan requires a detailed analysis of untested areas to provide a more complete and reliable testing strategy.