test(selftests): cover theme picker category map

HellionChat/Plugin.cs

@@ -343,6 +343,7 @@ public sealed class Plugin : IAsyncDalamudPlugin
                 new SelfTests.FoxBannerTextureSmokeStep(this),
                 new SelfTests.SidebarModeAutoSwitchStep(this),
                 new SelfTests.ColorEditorBufferStep(this),
+                new SelfTests.ThemePickerCategoryStep(this),
                 new SelfTests.ConfigMigrationV20Step(this),
                 new SelfTests.HoverSheenAllocStep(this),
                 new SelfTests.HonorificHeaderRenderStep(this),

HellionChat/SelfTests/ThemePickerCategoryStep.cs

@@ -0,0 +1,51 @@
+using System.Linq;
+using Dalamud.Bindings.ImGui;
+using Dalamud.Plugin.SelfTest;
+using HellionChat.Themes;
+using HellionChat.Ui.Components.Settings;
+
+namespace HellionChat.SelfTests;
+
+internal sealed class ThemePickerCategoryStep : ISelfTestStep
+{
+    private readonly Plugin _plugin;
+
+    public ThemePickerCategoryStep(Plugin plugin)
+    {
+        _plugin = plugin;
+    }
+
+    public string Name => "Hellion Chat - Theme picker category coverage";
+
+    public SelfTestStepResult RunStep()
+    {
+        var builtinSlugs = _plugin.ThemeRegistry.BuiltinSlugs.ToHashSet();
+        var categorySlugs = ThemePicker.CategoryMapSlugs.ToList();
+
+        var duplicates = categorySlugs.GroupBy(x => x).Where(g => g.Count() > 1).Select(g => g.Key).ToList();
+        if (duplicates.Count > 0)
+        {
+            ImGui.Text($"Duplicate slugs in category map: {string.Join(", ", duplicates)}");
+            return SelfTestStepResult.Fail;
+        }
+
+        var categorySet = categorySlugs.ToHashSet();
+        var missing = builtinSlugs.Except(categorySet).ToList();
+        var unknown = categorySet.Except(builtinSlugs).ToList();
+
+        if (missing.Count > 0)
+        {
+            ImGui.Text($"Builtin slugs missing from category map: {string.Join(", ", missing)}");
+            return SelfTestStepResult.Fail;
+        }
+        if (unknown.Count > 0)
+        {
+            ImGui.Text($"Unknown slugs in category map (no matching builtin): {string.Join(", ", unknown)}");
+            return SelfTestStepResult.Fail;
+        }
+
+        return SelfTestStepResult.Pass;
+    }
+
+    public void CleanUp() { }
+}