chore(deps): update mstest to 4.0.1

[thomhurst]

This PR contains the following updates:

Package	Type	Update	Change
MSTest.TestAdapter	nuget	patch	4.0.0 -> 4.0.1
MSTest.TestFramework	nuget	patch	4.0.0 -> 4.0.1

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Release Notes

microsoft/testfx (MSTest.TestAdapter)

v4.0.1

See the release notes here

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about these updates again.

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• If you want to rebase/retry this PR, check this box

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This PR has been generated by Renovate Bot.

[claude]

Claude finished @thomhurst's task —— View job

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PR Review: MSTest 4.0.1 Update

I'll review this dependency update PR and provide feedback on code quality, potential issues, performance, security, and test coverage.

Review Tasks:

• Analyze the changed files
• Review MSTest 4.0.1 changes and compatibility
• Check for potential security concerns
• Assess impact on TUnit project
• Provide final review feedback

Review Summary

✅ APPROVED - This is a safe patch version update

Code Quality & Best Practices

✅ Excellent - The change follows proper centralized package management practices:

• Updates are made in Directory.Packages.props with centralized version management
• Both MSTest.TestAdapter and MSTest.TestFramework are updated together (lines 51-52)
• Version consistency maintained across related packages

Potential Bugs or Issues

✅ Low Risk - Patch version updates (4.0.0 → 4.0.1) are typically:

• Bug fixes and minor improvements only
• Backward compatible by semantic versioning standards
• No breaking changes expected

Performance Considerations

✅ Neutral to Positive - MSTest 4.0.1 likely includes:

• Performance improvements and bug fixes
• No performance regressions expected in patch releases
• Impact isolated to benchmarking/testing scenarios only

Security Concerns

✅ Low Risk - Security considerations:

• Patch versions often include security fixes
• MSTest is only used in test/benchmark contexts, not production
• No direct security exposure in the main TUnit framework

Test Coverage Impact

✅ Minimal Impact - MSTest usage in TUnit is limited to:

1. Performance benchmarking (tools/speed-comparison/ - for comparing TUnit vs other frameworks)
2. Analyzer testing (TUnit.Analyzers.Tests/ - testing MSTest migration functionality)
3. Migration support (MSTest → TUnit analyzers and code fixers)

None of these affect core TUnit functionality.

Compatibility Assessment

✅ Fully Compatible - Analysis shows:

• MSTest usage is properly conditional (#if MSTEST directives)
• All MSTest references use standard APIs that are stable across patch versions
• Migration analyzers target Microsoft.VisualStudio.TestTools.UnitTesting namespace (unchanged)

Recommendations

1. ✅ Approve and merge - This is a routine maintenance update
2. Consider: Run the speed comparison benchmarks after merge to verify no performance regressions
3. Future: Continue allowing Renovate to handle MSTest patch updates automatically

Files Affected Analysis

• Directory.Packages.props:51-52 - Standard version bumps ✅
• Usage spans: benchmarking, analyzer testing, migration tooling ✅
• No core framework impact ✅

Verdict: Safe to merge with confidence. 🚀