testing-wpf

Create and maintain WPF UI tests and ViewModel tests for the .NET 8 widget host app. Use when setting up UI automation, testing MVVM logic, or building a test harness for widgets and the shell.

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SKILL.md

Testing Wpf

Overview

Cover UI behavior and ViewModel logic without coupling tests to WPF internals.

Core areas

ViewModel unit tests
UI automation tests
Test harness for widget windows

Definition of done (DoD)

ViewModels tested via WidgetTestHarness with NoOp service implementations
Commands tested for execute and can-execute behavior
State changes tested through observable property assertions
No tests depend on actual WPF runtime (prefer ViewModel tests)
Test harness updated when new services are added

Workflow

Write ViewModel tests for commands, state, and validation.
Use UI automation sparingly for critical flows.
Keep UI tests stable by controlling test data and timings.
Build a test harness that can host widgets and shell views.

Guidance

Prefer ViewModel tests over UI automation where possible.
Avoid fragile selector strategies in UI tests.
Keep test runs isolated from user desktop state.

References

references/ui-testing.md for UI automation strategy.
references/viewmodel-tests.md for MVVM test patterns.
references/test-harness.md for widget test host setup.