Replaces the brittle root.GetVisualDescendants().OfType<T>().Single() / .First()
pattern with a new WaitForComponent<T>() extension that polls until the requested
control is in the visual tree, then returns it. Avalonia.Headless tests routinely
queried the visual tree before lazily-templated panes (DataGrid, dock content)
had materialised, surfacing as intermittent 'Sequence contains no elements'
failures across the suite.
Assisted-by: Claude:claude-opus-4-7:Claude Code
Each tree-expansion, selection change, command execution, async wait and
key/mouse injection inside an [AvaloniaTest] now carries a short imperative
comment on the line above (e.g. "// expand typeNode", "// select methodA",
"// wait for assemblies to load", "// execute aboutCmd"). The comments are
the same scaffolding the manual debug-with-screenshot workflow uses to
follow what's happening at each breakpoint, surfaced into the committed
source so the tests are readable without the breakpoint markers attached.
Assisted-by: Claude:claude-opus-4-7:Claude Code
Adds a leading paragraph describing what each test verifies and Arrange /
Act / Assert markers (split into numbered phases for multi-step tests) so
the intent of each fixture is readable from comments alone.
Assisted-by: Claude:claude-opus-4-7:Claude Code
Added two new headless tests in MainWindowTests:
- Back_Navigation_Restores_Previously_Selected_Node — selects two methods on
Enumerable, executes DockWorkspace.NavigateBackCommand, asserts the original
node is reselected, decompiled text reverts, and the row is centred.
- Opening_Assembly_Adds_It_To_The_Tree — drives the production OpenCommand via
MainMenuCommandRegistry (matched by Resources._Open header), confirms the
new LoadedAssembly appears, the AssemblyTreeNode is reachable by short name,
and SharpTreeNode.IsSelected is set on the freshly opened node.
Assisted-by: Claude:claude-opus-4-7:Claude Code
DecompileAsEnumerableTest exercises the full path: open mscorlib, navigate
to Enumerable.AsEnumerable, render the decompilation, verify text and
verify the row centred in the assembly tree. Writing it surfaced two
pre-existing bugs the manual smoke-test missed:
Siegfried Pammer