From 26a4f4240bd180ffd2ec082166e115fae6bb6b0e Mon Sep 17 00:00:00 2001
From: Meta Vens <rwvens@hotmail.com>
Date: Tue, 29 Sep 2026 17:29:02 +0200
Subject: [PATCH] Pin that a zero or missing Random state decodes to the
 generator's default seed

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
---
 .../CultMathSerializationTests.cs                  | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/tests/GameCult.Caching.Tests/CultMathSerializationTests.cs b/tests/GameCult.Caching.Tests/CultMathSerializationTests.cs
index fb6f1489..32531679 100644
--- a/tests/GameCult.Caching.Tests/CultMathSerializationTests.cs
+++ b/tests/GameCult.Caching.Tests/CultMathSerializationTests.cs
@@ -141,6 +141,20 @@ namespace GameCult.Caching.Tests
             Decode<Color32>("94CCFFCC800007").Should().Be(new Color32(255, 128, 0, 7));
         }
 
+
+        [Test]
+        public void Random_StateZero_IsTheGeneratorDefaultSeed()
+        {
+            // CultMath's generator maps state 0 to its default seed, so a zero or missing state is not degenerate.
+            var reference = new CultMath.Random(0u);
+            var expected = new[] { reference.NextUInt(), reference.NextUInt(), reference.NextUInt() };
+
+            foreach (var hex in new[] { "9100", "90" })
+            {
+                var decoded = Decode<CultMath.Random>(hex);
+                new[] { decoded.NextUInt(), decoded.NextUInt(), decoded.NextUInt() }.Should().Equal(expected);
+            }
+        }
         [Test]
         public void ConsumerResolvers_WinOverCultMathResolver()
         {