CaretHighlightAdornerTests waited on the wall clock (3s budget) for the
adorner's 1s real-time DispatcherTimer to remove it. Avalonia.Headless has no
simulated clock, so under a loaded CI runner the dispatcher-thread timer plus
the poll loop slipped past the tight budget and the test timed out
intermittently.
Extract the teardown the lifetime timer runs into Dismiss(); the test grabs the
live adorner and calls it directly, verifying the unregister half without any
timing dependency. Registration is still exercised through the real
OnReferenceClicked path, and production behaviour is unchanged.
Assisted-by: Claude:claude-opus-4-8:Claude Code
The Reload/Remove/SearchMSDN/OpenContainingFolder/DecompileInNewView
tests used to call `entry.Execute(synthetic TextViewContext)` against
a hand-built context. They now select via the assembly-tree model,
build the context menu through `BuildContextMenuForCurrentState`
(the same call the live `Opening` event makes), and fire the menu
item's `Click` routed event — the same handler the user's click
invokes. This widens the coverage to the menu-build → click-handler
attachment pipeline.
Assisted-by: Claude:claude-opus-4-7:Claude Code
CaretHighlightAdorner is an IBackgroundRenderer on KnownLayer.Caret with a
hand-rolled animation curve (Stopwatch + DispatcherTimer at ~60fps invalidating
the layer) instead of WPF's RectAnimation/BeginAnimation, since AvaloniaEdit
has no XAML-style animation primitive for ad-hoc visuals. Same timing as WPF
(300ms grow, 300ms shrink, opacity fade 450-650ms, 1s lifetime).
Assisted-by: Claude:claude-opus-4-7:Claude Code
Siegfried Pammer