From 4627a29302aa780ba8de1e537a869650601debc3 Mon Sep 17 00:00:00 2001
From: "Somhairle H. Marisol" <muqiu-han@outlook.com>
Date: Sat, 19 Sep 2026 02:24:26 +0800
Subject: feat: M2a NPC 心智基础 — Needs 衰减 + Personality(seed) +
 决策层v1(需求缺口×性格权重) + 四语义点直线移动 + headless NPC 摘要 +
 对拍/衰减测试
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---
 src/LivingVillage.Kernel.Tests/DeterminismTests.fs | 47 ++++++++++++++++++++++
 1 file changed, 47 insertions(+)

(limited to 'src/LivingVillage.Kernel.Tests')

diff --git a/src/LivingVillage.Kernel.Tests/DeterminismTests.fs b/src/LivingVillage.Kernel.Tests/DeterminismTests.fs
index 2e2663b..aba794e 100644
--- a/src/LivingVillage.Kernel.Tests/DeterminismTests.fs
+++ b/src/LivingVillage.Kernel.Tests/DeterminismTests.fs
@@ -133,3 +133,50 @@ type DeterminismTests () =
             let f, rng' = Rng.nextFloat32 rng
             if f < 0.0f || f >= 1.0f then Assert.Fail($"out of range: {f}")
             rng <- rng'
+
+    [<TestMethod>]
+    member _.NpcDecisionTraceIsTickByTickDeterministic () =
+        let runNpc (seed: uint64) (ticks: int64) : World list =
+            let mutable world = Sim.initialWorld seed
+            let acc = ResizeArray<World> (int ticks + 1)
+            acc.Add world
+            let zero = { Input = { MoveX = 0.0f; MoveY = 0.0f } }
+            for _ in 1L .. ticks do
+                world <- Sim.step zero world
+                acc.Add world
+            List.ofSeq acc
+        let a = runNpc 42UL 20000L
+        let b = runNpc 42UL 20000L
+        Assert.IsTrue(20001 = List.length a)
+        CollectionAssert.AreEqual(Array.ofList a, Array.ofList b)
+
+    [<TestMethod>]
+    member _.NpcNeedsDecayOverTimeAndActionsDifferAcrossSeeds () =
+        let w0 = Sim.initialWorld 42UL
+        let npc0 = List.exactlyOne w0.Npcs
+        let zero = { Input = { MoveX = 0.0f; MoveY = 0.0f } }
+        let mutable w = w0
+        for _ in 1 .. 500 do
+            w <- Sim.step zero w
+        let npc1 = List.exactlyOne w.Npcs
+        let n0 = npc0.Mind.Needs
+        let n1 = npc1.Mind.Needs
+        Assert.IsTrue(n1.Hunger < n0.Hunger, "hunger must decay")
+        Assert.IsTrue(n1.Energy < n0.Energy, "energy must decay")
+        Assert.IsTrue(n1.Social < n0.Social, "social must decay")
+        Assert.IsTrue(n1.Money < n0.Money, "money must decay")
+        let wa = Sim.initialWorld 42UL
+        let wb = Sim.initialWorld 43UL
+        Assert.IsTrue(wa.Npcs.[0].Mind.Personality <> wb.Npcs.[0].Mind.Personality,
+                      "personalities must differ across seeds")
+        let mutable ta = wa
+        let mutable tb = wb
+        let seqA = ResizeArray<NpcActionKind> 20000
+        let seqB = ResizeArray<NpcActionKind> 20000
+        for _ in 1 .. 20000 do
+            ta <- Sim.step zero ta
+            tb <- Sim.step zero tb
+            seqA.Add ta.Npcs.[0].Mind.Action
+            seqB.Add tb.Npcs.[0].Mind.Action
+        if Seq.compareWith compare seqA seqB = 0 then
+            Assert.Fail("npc action sequence must diverge across seeds")
-- 
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