fix path tests on linux?

Jenkinsfile

@@ -11,6 +11,7 @@ node("Diligence") {
         git branch: env.BRANCH_NAME, credentialsId: 'Ionite', url: "https://github.com/${author}/${repoName}.git"
     }
     
+    try {
         stage('Test') {
             sh "dotnet test StabilityMatrix.Tests"
         }
@@ -40,8 +41,11 @@ node("Diligence") {
                 archiveArtifacts artifacts: 'out/*.appimage', followSymlinks: false
             }
         }
-
+    } finally {
         stage('Cleanup') {
             cleanWs()
         }
     }
+
+    
+}

StabilityMatrix.Tests/Models/InstalledPackageTests.cs

@@ -1,4 +1,5 @@
-using StabilityMatrix.Core.Models;
+using System.Runtime.InteropServices;
+using StabilityMatrix.Core.Models;
 
 namespace StabilityMatrix.Tests.Models;
 
@@ -12,6 +13,16 @@ public class InstalledPackageTests
     [DataRow("C:\\User\\AppData\\StabilityMatrix", "C:\\User\\AppData\\StabilityMatrix\\Packages\\abc", "Packages\\abc")]
     public void TestGetSubPath(string relativeTo, string path, string? expected)
     {
+        if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+        {
+            relativeTo = relativeTo.Replace("C:\\", $"{Path.DirectorySeparatorChar}")
+                .Replace('\\', Path.DirectorySeparatorChar);
+            path = path.Replace("C:\\", $"{Path.DirectorySeparatorChar}")
+                .Replace('\\', Path.DirectorySeparatorChar);
+            expected = expected?.Replace("C:\\", $"{Path.DirectorySeparatorChar}")
+                .Replace('\\', Path.DirectorySeparatorChar);
+        }
+        
         var result = InstalledPackage.GetSubPath(relativeTo, path);
         Assert.AreEqual(expected, result);
     }