Expose aggregated test execution metrics including retries #7393
Description
Summary
Expose aggregated test execution metrics that include all retry attempts, instead of reporting only the outcome of the last attempt.
Background and Motivation
When Microsoft Testing Platform runs tests with retries, each attempt produces its own TRX file. Azure DevOps can merge these files and visually show all attempts, but this aggregated information is not available programmatically.
This makes it impossible to build custom automation or quality gates based on actual execution behavior.
Proposed Feature
Expose aggregated execution metrics directly in the final TRX file generated by Microsoft Testing Platform, so that it contains information not only about the last execution attempt but about all attempts, including retries.
These aggregated metrics could include:
- total executions including retries
- failures across all attempts
- number of retry attempts per test
- tests that only passed after retry
This approach avoids introducing new report types or additional files, and keeps the information accessible through the existing TRX pipeline that tools already consume.
Alternative Designs
Manually parsing all TRX files is possible but unreliable and not automation‑friendly. A built‑in solution would be more robust and portable.