Every existing MossTank markup pin (MossTankMarkupContractTests) validates
mosstank*.xml against MossTankPanel through reflection alone — "does a
public property with this name and this CLR type exist" — never through
MarkupDocument.Build itself, the code that actually mounts a plugin panel
at runtime. Build has its own validation a reflection-only check can't
see (attribute-format exceptions, delegate-shape mismatches, numeric-
attribute parsing, column-type dispatch). Before this test, a markup bug
of that shape would throw inside RetailUiRuntime.MountPlugins's own
try/catch and the panel would simply not appear — no test failure, no
visible error short of a live client screenshot.
New MossTankMarkupBuildOverRealFilesTests (AcDream.App.Tests) builds every
real mosstank*.xml file against a REAL MossTankPanel with a stub
IPluginHost (same shape as MossTankMarkupContractTests.StubHost) and a
fake sprite resolver. Required: a real compile-time ProjectReference from
AcDream.App.Tests to AcDream.Plugins.MossTank (test-only exception to the
plugin/host boundary — AcDream.App itself never links this assembly, see
its own ReferenceOutputAssembly=false copy target) plus
InternalsVisibleTo("AcDream.App.Tests") on the plugin project (MossTankPanel
is internal). The test project also globs mosstank*.xml from the plugin's
source directory into its own output, same pattern item 13 established.
This test caught a REAL bug on its first run: mosstank-advanced.xml's new
lFilterList (item 9's category checklist) had no selected="..." attribute.
MarkupDocument.BindRequiredIntReader throws "list selected must be an int
binding" when a <list>'s selected attribute is missing at all — a pure
checklist with no real "selected row" concept still needs one to satisfy
the markup grammar. Fixed by adding SelectedAdvancedOptionCategoryIndex
(always -1; item 10 already removed row-selection-band rendering for
every column grid, so this drives no visible highlight) and wiring
selected="{SelectedAdvancedOptionCategoryIndex}" onto that list.
tests/AcDream.Plugins.MossTank.Tests: 675/675 (unchanged — this item's
scope is entirely App-side plus one real bug fix invisible to MossTank's
own reflection-only pins).
tests/AcDream.App.Tests --filter Markup|Plugin|UiMenu|Slider: 283/3 skipped/286 (was 278/3/281, +5: the new Theory's 5 file cases).
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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