Stats: stat sheets, formulas, archetypes, traits, stat pools, actions, conditions and sheet panel

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/StatsServiceTests.cs

@@ -0,0 +1,44 @@
+namespace Cthangover.Mods.Stats.Tests
+{
+    using Cthangover.Core.Mods.Testing;
+
+    /// <summary>
+    /// The facade's "who" rules and the opt-in of the battle bridge: a character with no
+    /// stats data of any kind is left alone, one that gains a bonus takes part.
+    /// </summary>
+    public class StatsServiceTests
+    {
+        private const string Nobody = "test_nobody_has_stats";
+
+        [ModTest("service/who_resolves")]
+        static void WhoResolves(ModTestContext ctx)
+        {
+            ModAssert.Equal(Nobody, StatsService.Resolve(" " + Nobody + " "), "an id is taken as written, trimmed");
+            ModAssert.NotNull(StatsService.Resolve("player"), "player always resolves to someone");
+            ModAssert.Equal(StatsService.Resolve(null), StatsService.Resolve("PLAYER"), "player in any case is the default");
+            ModAssert.True(StatsService.Targets("party").Count >= 1, "party is the roster, or the player alone");
+            ModAssert.Equal(1, StatsService.Targets(Nobody).Count, "an id is one target");
+        }
+
+        [ModTest("service/participation_is_opt_in")]
+        static void ParticipationIsOptIn(ModTestContext ctx)
+        {
+            var saved = StatState.Instance.Data;
+            try
+            {
+                StatState.Instance.Data = new StatStateData();
+                ModAssert.False(StatsService.Participates(Nobody), "no archetype, no stats data, no bonus, no gear: not touched");
+                StatsService.AddBonus(Nobody, "str", 1);
+                ModAssert.True(StatsService.Participates(Nobody), "a bonus gained during play opts in");
+                ModAssert.CloseTo(1, StatsService.Sheet(Nobody).GetBase("str") - (StatsService.Definition("str")?.Default ?? 0), what: "and shows on the sheet");
+                StatsService.SetArchetype(Nobody, "some_archetype");
+                ModAssert.Equal("some_archetype", StatsService.ArchetypeOf(Nobody), "a chosen archetype wins over the template's");
+            }
+            finally
+            {
+                StatState.Instance.Data = saved;
+                StatsService.ClearCache();
+            }
+        }
+    }
+}