What metrics of quality should AQA monitor in a project? Tell more about test coverage and how to work with it.

AQA (Automated Quality Assurance Testing) should monitor key quality metrics to ensure the reliability and effectiveness of testing:

• Test coverage: shows which parts of the code or functionality are covered by tests. It's important not only the number of covered lines or functions but also the quality of coverage — how well tests check different scenarios.

  Working with coverage includes:

  • Using tools to measure coverage (e.g., Istanbul, JaCoCo).
  • Analyzing uncovered areas and adding tests for critical parts.
  • Balancing coverage with the costs of writing tests.

• Percentage of successful tests: reflects system and test stability.

• Test execution time: helps optimize the testing cycle.

• Number of defects found by tests: shows the effectiveness of tests in identifying bugs.

• Requirements coverage: how well tests cover business requirements.

Thus, test coverage is one of the important indicators, but it should be used together with other metrics for a comprehensive quality assessment.