Stabilize XamlMessageBox UI-thread dispatch test#2430
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Use xUnit's WPF dispatcher for the XamlMessageBox background-thread dispatch regression test instead of creating and shutting down a private dispatcher thread. This avoids intermittent hangs from dispatcher/Application state while preserving the regression coverage. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
mconnew
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May 28, 2026
| Dispatcher.CurrentDispatcher.InvokeShutdown(); | ||
| }; | ||
| Application app = Application.Current ?? new Application(); | ||
| app.ShutdownMode = ShutdownMode.OnExplicitShutdown; |
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If you have multiple WPF based tests, it might be worth using an IFixture to set these things up. But if it's the only test, not worth bothering with.
This was referenced Jun 16, 2026
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This was referenced Jun 17, 2026
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Summary
Show_AutoDispatchesToUIThreadFromBackgroundThreadto use xUnit's[WpfFact]dispatcher instead of manually creating and shutting down a WPF dispatcher thread.XamlMessageBox.Showcall directly and keep a timeout assertion for clearer failure behavior.Validation
PerfViewTests.dllruns passed after the change, with 87/87 tests passing each run.