Simplify the PR test matrix #4049
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sharwell
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Dec 1, 2025
sharwell
commented
- Added a planner (build/compute-impacted-tests.ps1) that diffs against the PR target branch, detects changed analyzers/code fixes, dependency changes, and touched test files, builds a per-language plan (full vs class-filtered), publishes test-plan.json, and exposes AllTestsFull with a safe fallback to a full matrix on failure.
- Updated the pipeline template (build/build-and-test.yml) to introduce a PlanTests job, publish the plan artifact, force full runs for C# 6 and the latest project, and gate the coverage stage on AllTestsFull; added a LatestLangVersion parameter.
- Taught the test template (build/test.yml) to consume the plan, support forced-full runs, skip execution when no classes are selected, use xUnit response files for class filters, avoid coverage on partial runs, and tolerate missing result files when nothing runs.
- Wired the root pipeline (azure-pipelines.yml) to pass the latest language version parameter.
* Added a planner (build/compute-impacted-tests.ps1) that diffs against the PR target branch, detects changed analyzers/code fixes, dependency changes, and touched test files, builds a per-language plan (full vs class-filtered), publishes test-plan.json, and exposes AllTestsFull with a safe fallback to a full matrix on failure. * Updated the pipeline template (build/build-and-test.yml) to introduce a PlanTests job, publish the plan artifact, force full runs for C# 6 and the latest project, and gate the coverage stage on AllTestsFull; added a LatestLangVersion parameter. * Taught the test template (build/test.yml) to consume the plan, support forced-full runs, skip execution when no classes are selected, use xUnit response files for class filters, avoid coverage on partial runs, and tolerate missing result files when nothing runs. * Wired the root pipeline (azure-pipelines.yml) to pass the latest language version parameter.
* Added build/Run-ImpactedTests.ps1, which builds (unless -NoBuild), computes impacted tests via the planner against a target branch (default upstream/master), and runs only the needed xUnit test classes locally while always exercising C# 6 and the latest suite. Results drop under artifacts/test-results, with options for -LangVersions and -VerboseLogging. * Enhanced build/compute-impacted-tests.ps1 to accept -TargetBranch and -AssumePullRequest, enabling local diff-based planning without a PR pipeline. * Documented the local selective test workflow in CONTRIBUTING.md, including usage examples and options.
* Updated build/Run-ImpactedTests.ps1 to auto-detect the target branch when none is provided: it now looks for a git remote pointing at DotNetAnalyzers/StyleCopAnalyzers (HTTPS or SSH) and uses <remote>/master; otherwise it falls back to origin/master. The resolved branch is logged. * The TargetBranch parameter default is now empty to trigger auto-detection, and the help text describes the behavior.
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## master #4049 +/- ##
========================================
Coverage 97.42% 97.43%
========================================
Files 977 979 +2
Lines 114316 114480 +164
Branches 3416 3418 +2
========================================
+ Hits 111376 111540 +164
Misses 1944 1944
Partials 996 996 🚀 New features to boost your workflow:
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