How do you assess the quality of testing?

The quality of testing is evaluated based on several criteria:

• Test coverage: how comprehensively tests cover functionality — by code (code coverage), requirements, and usage scenarios.
• Defect detection: how many and what types of bugs are found at different stages.
• Test relevance: how well tests verify real business cases and critical scenarios.
• Automation: the level of test automation, which affects testing speed and repeatability.
• Response time to changes: how quickly tests are updated when the product changes.

In my practice, I use coverage metrics, analyze detected defects and their severity, and gather feedback from the development team and users to understand how effective and comprehensive the testing is.