first commit

Nitrox.Test/Model/Platforms/OSTestMethodAttribute.cs

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+namespace Nitrox.Test.Model.Platforms;
+
+[AttributeUsage(AttributeTargets.Method)]
+public class OSTestMethodAttribute : TestMethodAttribute
+{
+    public string Platform { get;}
+
+    /// <summary>
+    /// Test method attribute, that will only run the test on the specified platform.
+    /// </summary>
+    /// <param name="platform">case insensitive platform, i.e: linux, windows, osx</param>
+    public OSTestMethodAttribute(string platform)
+    {
+        Platform = platform;
+    }
+
+    public override TestResult[] Execute(ITestMethod testMethod)
+    {
+        if (!OperatingSystem.IsOSPlatform(Platform))
+        {
+            return [
+                new TestResult()
+                {
+                    Outcome = UnitTestOutcome.Inconclusive,
+                    TestContextMessages = $"This test can only be run on {Platform}"
+                }
+            ];
+        }
+
+        return base.Execute(testMethod);
+    }
+}