From d1fb68f41901f671cf680e39e3860df0d7f004b7 Mon Sep 17 00:00:00 2001
From: Erik <erik.nihlen@gmail.com>
Date: Tue, 28 Apr 2026 11:58:50 +0200
Subject: [PATCH] test(world): serialize DerethDateTime offset tests

---
 .../AcDream.Core.Tests/World/DerethDateTimeCollection.cs | 9 +++++++++
 tests/AcDream.Core.Tests/World/DerethDateTimeTests.cs    | 1 +
 tests/AcDream.Core.Tests/World/SkyStateTests.cs          | 1 +
 tests/AcDream.Core.Tests/World/WorldTimeDebugTests.cs    | 1 +
 4 files changed, 12 insertions(+)
 create mode 100644 tests/AcDream.Core.Tests/World/DerethDateTimeCollection.cs

diff --git a/tests/AcDream.Core.Tests/World/DerethDateTimeCollection.cs b/tests/AcDream.Core.Tests/World/DerethDateTimeCollection.cs
new file mode 100644
index 0000000..48597b0
--- /dev/null
+++ b/tests/AcDream.Core.Tests/World/DerethDateTimeCollection.cs
@@ -0,0 +1,9 @@
+using Xunit;
+
+namespace AcDream.Core.Tests.World;
+
+[CollectionDefinition(Name, DisableParallelization = true)]
+public sealed class DerethDateTimeCollection
+{
+    public const string Name = "DerethDateTime global offset";
+}
diff --git a/tests/AcDream.Core.Tests/World/DerethDateTimeTests.cs b/tests/AcDream.Core.Tests/World/DerethDateTimeTests.cs
index 86fb5a9..c665917 100644
--- a/tests/AcDream.Core.Tests/World/DerethDateTimeTests.cs
+++ b/tests/AcDream.Core.Tests/World/DerethDateTimeTests.cs
@@ -3,6 +3,7 @@ using Xunit;
 
 namespace AcDream.Core.Tests.World;
 
+[Collection(DerethDateTimeCollection.Name)]
 public sealed class DerethDateTimeTests
 {
     // ACE calendar anchor: tick 0 = Morningthaw 1, 10 P.Y. at Morntide-and-Half
diff --git a/tests/AcDream.Core.Tests/World/SkyStateTests.cs b/tests/AcDream.Core.Tests/World/SkyStateTests.cs
index bd3bc73..1c67720 100644
--- a/tests/AcDream.Core.Tests/World/SkyStateTests.cs
+++ b/tests/AcDream.Core.Tests/World/SkyStateTests.cs
@@ -4,6 +4,7 @@ using Xunit;
 
 namespace AcDream.Core.Tests.World;
 
+[Collection(DerethDateTimeCollection.Name)]
 public sealed class SkyStateTests
 {
     [Fact]
diff --git a/tests/AcDream.Core.Tests/World/WorldTimeDebugTests.cs b/tests/AcDream.Core.Tests/World/WorldTimeDebugTests.cs
index 7acf0d1..60ead10 100644
--- a/tests/AcDream.Core.Tests/World/WorldTimeDebugTests.cs
+++ b/tests/AcDream.Core.Tests/World/WorldTimeDebugTests.cs
@@ -4,6 +4,7 @@ using Xunit;
 
 namespace AcDream.Core.Tests.World;
 
+[Collection(DerethDateTimeCollection.Name)]
 public sealed class WorldTimeDebugTests
 {
     [Fact]