From 8fad58bd62155da653251ab7457cd54ebba0b279 Mon Sep 17 00:00:00 2001
From: "Somhairle H. Marisol" <muqiu-han@outlook.com>
Date: Tue, 22 Sep 2026 00:50:30 +0800
Subject: test(desktop): P17 取证钩子（LV_AUTOPLAY_START_HOUR 纯函数起时）+
 证据与 docs 记录
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---
 src/LivingVillage.Desktop.Tests/PrototypeTests.fs | 4 ++++
 1 file changed, 4 insertions(+)

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

diff --git a/src/LivingVillage.Desktop.Tests/PrototypeTests.fs b/src/LivingVillage.Desktop.Tests/PrototypeTests.fs
index 5a153b1..4d2c895 100644
--- a/src/LivingVillage.Desktop.Tests/PrototypeTests.fs
+++ b/src/LivingVillage.Desktop.Tests/PrototypeTests.fs
@@ -897,6 +897,10 @@ type PrototypeTests () =
         Assert.AreEqual<float32>(0.0f, (atHour 13).LanternGlow)
         Assert.AreEqual<float32>(1.0f, (atHour 0).LanternGlow)
 
+        // Evidence hook: fractional start hours map exactly onto sim ticks.
+        Assert.AreEqual<int64>(int64 20 * ticksPerHour + ticksPerHour * 3L / 4L, M6Presentation.startTickForHour 20.75)
+        Assert.AreEqual<int64>(6L * ticksPerHour, M6Presentation.startTickForHour 6.0)
+
     [<TestMethod>]
     member _.TitleEntranceProgressIsDeterministicAndCompleteAfterTwoSeconds () =
         // 120 frames at the fixed 60Hz step = 2s entrance, pure function of frame count.
-- 
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