check operating system for absolute path test

.ci/azure-pipelines.yml

@@ -112,7 +112,7 @@ jobs:
   - job: main_test
     displayName: Main Test
     pool:
-      vmImage: ubuntu-latest
+      vmImage: windows-latest
     steps:
     - checkout: self
       clean: true

Emby.Server.Implementations/IO/ManagedFileSystem.cs

@@ -448,7 +448,7 @@ namespace Emby.Server.Implementations.IO
 
         public virtual void SetHidden(string path, bool isHidden)
         {
-            if (OperatingSystem.Id != MediaBrowser.Model.System.OperatingSystemId.Windows)
+            if (OperatingSystem.Id != OperatingSystemId.Windows)
             {
                 return;
             }
@@ -779,7 +779,7 @@ namespace Emby.Server.Implementations.IO
 
         public virtual void SetExecutable(string path)
         {
-            if (OperatingSystem.Id == MediaBrowser.Model.System.OperatingSystemId.Darwin)
+            if (OperatingSystem.Id == OperatingSystemId.Darwin)
             {
                 RunProcess("chmod", "+x \"" + path + "\"", Path.GetDirectoryName(path));
             }

tests/Jellyfin.Server.Implementations.Tests/IO/ManagedFileSystemTests.cs

@@ -1,6 +1,8 @@
+using System;
 using AutoFixture;
 using AutoFixture.AutoMoq;
 using Emby.Server.Implementations.IO;
+using MediaBrowser.Model.System;
 using Xunit;
 
 namespace Jellyfin.Server.Implementations.Tests.IO
@@ -26,7 +28,16 @@ namespace Jellyfin.Server.Implementations.Tests.IO
             string expectedAbsolutePath)
         {
             var generatedPath = _sut.MakeAbsolutePath(folderPath, filePath);
-            Assert.Equal(expectedAbsolutePath, generatedPath);
+
+            if (MediaBrowser.Common.System.OperatingSystem.Id == OperatingSystemId.Windows)
+            {
+                var windowsPath = "d:" + generatedPath.Replace('/', '\\');
+                Assert.Equal(expectedAbsolutePath, windowsPath);
+            }
+            else
+            {
+                Assert.Equal(expectedAbsolutePath, generatedPath);
+            }
         }
     }
 }