From 39066900773e7857faf2d02e7ed51b71d219d97d Mon Sep 17 00:00:00 2001
From: godosa <godosa@godosa.eu>
Date: Tue, 6 Oct 2026 23:39:36 +0200
Subject: godosa-engine: initial public history

---
 .../Diagnostics/GpuAndCsvTests.cs                  | 53 ++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 src/Godosa.Core.Tests/Diagnostics/GpuAndCsvTests.cs

(limited to 'src/Godosa.Core.Tests/Diagnostics/GpuAndCsvTests.cs')

diff --git a/src/Godosa.Core.Tests/Diagnostics/GpuAndCsvTests.cs b/src/Godosa.Core.Tests/Diagnostics/GpuAndCsvTests.cs
new file mode 100644
index 0000000..46cf5ed
--- /dev/null
+++ b/src/Godosa.Core.Tests/Diagnostics/GpuAndCsvTests.cs
@@ -0,0 +1,53 @@
+using System.Globalization;
+using System.Threading;
+using Godosa.Core.Diagnostics;
+using Xunit;
+
+namespace Godosa.Core.Tests.Diagnostics;
+
+public class GpuAndCsvTests
+{
+    [Fact]
+    public void GpuSamples_AverageSeparatelyFromFrames()
+    {
+        var stats = new FrameTimeStats(capacity: 4);
+        stats.Record(0.016, 0.002, 1, 0.0001);
+        Assert.Equal(0, stats.Summarize().GpuSamples);
+        Assert.Equal(0.0, stats.Summarize().AvgGpuMs);
+
+        stats.RecordGpu(0.001);
+        stats.RecordGpu(0.003);
+
+        var s = stats.Summarize();
+        Assert.Equal(2, s.GpuSamples);
+        Assert.Equal(2.0, s.AvgGpuMs, precision: 9);
+    }
+
+    [Fact]
+    public void GpuSamples_RollOverTheWindow()
+    {
+        var stats = new FrameTimeStats(capacity: 2);
+        stats.RecordGpu(0.010);
+        stats.RecordGpu(0.001);
+        stats.RecordGpu(0.003);
+
+        Assert.Equal(2.0, stats.Summarize().AvgGpuMs, precision: 9);
+    }
+
+    [Fact]
+    public void CsvRow_IsInvariantCulture_MsWithThreeDecimals_GpuBlankWhenUnknown()
+    {
+        var previous = Thread.CurrentThread.CurrentCulture;
+        Thread.CurrentThread.CurrentCulture = new CultureInfo("de-DE"); // comma decimals must not leak in
+        try
+        {
+            Assert.Equal("t_s,frame_ms,work_ms,sim_ticks,sim_ms,gpu_ms", PerfCsv.Header());
+            Assert.Equal("12.500,16.667,2.000,1,0.100,1.250", PerfCsv.Row(12.5, 0.0166667, 0.002, 1, 0.0001, 0.00125));
+            Assert.Equal("0.000,16.667,2.000,0,0.000,", PerfCsv.Row(0, 0.0166667, 0.002, 0, 0, null));
+        }
+        finally
+        {
+            Thread.CurrentThread.CurrentCulture = previous;
+        }
+    }
+}
-- 
cgit