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Fix MSTEST0063 to detect invalid constructors on derived TestClass attributes by @Evangelink in #9851 (backport to rel/4.3) - #10115
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Amaury Levé (Evangelink) merged 1 commit intoJul 21, 2026
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…tributes TestClassConstructorShouldBeValidAnalyzer used an exact-match check (SymbolEqualityComparer.Default.Equals) for TestClassAttribute, so derived attributes like [STATestClass] or custom [MyTestClass] were silently skipped. MSTest discovers such classes at runtime via Inherits() logic, so a private/internal constructor causes a runtime failure but no analyzer warning. Switch the guard to IsTestClass() (which uses Inherits()) to match the runtime discovery logic, and add four tests covering derived and custom TestClass attributes. Fixesmicrosoft#9836 Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: d1590213-39c9-4b3d-9fa4-1d10ac4961cc
Amaury Levé (Evangelink)
approved these changes
Jul 21, 2026
Amaury Levé (Evangelink)
enabled auto-merge (squash)
July 21, 2026 12:57
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Backport of #9851 to rel/4.3
/cc Amaury Levé (@Evangelink)