From 169a3e5d34a26ce7bc6f3d4a4513ab3bdc99e8e6 Mon Sep 17 00:00:00 2001
From: Shadowghost <Shadowghost@users.noreply.github.com>
Date: Sun, 27 Sep 2026 16:30:35 -0400
Subject: Backport pull request #18058 from jellyfin/release-12.z

Fix test concurrency

Original-merge: 3ca0b6f23adbf622c7c644a2c386b91d06ee06a9

Merged-by: crobibero <cody@robibe.ro>

Backported-by: Cody Robibero <cody@robibe.ro>
---
 tests/Jellyfin.Controller.Tests/Entities/BaseItemTests.cs |  7 +++++++
 tests/Jellyfin.Controller.Tests/Entities/PlaylistTests.cs | 11 +++++++++--
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/tests/Jellyfin.Controller.Tests/Entities/BaseItemTests.cs b/tests/Jellyfin.Controller.Tests/Entities/BaseItemTests.cs
index e072bccb82..c67717e2fa 100644
--- a/tests/Jellyfin.Controller.Tests/Entities/BaseItemTests.cs
+++ b/tests/Jellyfin.Controller.Tests/Entities/BaseItemTests.cs
@@ -40,15 +40,21 @@ public class BaseItemTests
         var previousLibrary = BaseItem.LibraryManager;
         var previousRepository = BaseItem.ItemRepository;
         var previousLogger = BaseItem.Logger;
+        var previousMediaSourceManager = BaseItem.MediaSourceManager;
         var library = new Mock<ILibraryManager>(MockBehavior.Strict);
         var repository = new Mock<MediaBrowser.Controller.Persistence.IItemRepository>(MockBehavior.Strict);
         var directory = new Mock<IDirectoryService>();
         directory.Setup(d => d.IsAccessible(It.IsAny<string>())).Returns(true);
+
+        // IsLibraryFolderAccessible reads FileNameWithoutExtension, which resolves the path protocol
+        var mediaSourceManager = new Mock<IMediaSourceManager>();
+        mediaSourceManager.Setup(x => x.GetPathProtocol(It.IsAny<string>())).Returns(MediaProtocol.File);
         try
         {
             BaseItem.LibraryManager = library.Object;
             BaseItem.ItemRepository = repository.Object;
             BaseItem.Logger = Microsoft.Extensions.Logging.Abstractions.NullLogger<BaseItem>.Instance;
+            BaseItem.MediaSourceManager = mediaSourceManager.Object;
             var folder = new FailingEnumerationFolder(failAfterFirstChild, accessDenied)
             {
                 Id = Guid.NewGuid(),
@@ -64,6 +70,7 @@ public class BaseItemTests
             BaseItem.LibraryManager = previousLibrary;
             BaseItem.ItemRepository = previousRepository;
             BaseItem.Logger = previousLogger;
+            BaseItem.MediaSourceManager = previousMediaSourceManager;
         }
     }
 
diff --git a/tests/Jellyfin.Controller.Tests/Entities/PlaylistTests.cs b/tests/Jellyfin.Controller.Tests/Entities/PlaylistTests.cs
index 70da5eafe5..1794469359 100644
--- a/tests/Jellyfin.Controller.Tests/Entities/PlaylistTests.cs
+++ b/tests/Jellyfin.Controller.Tests/Entities/PlaylistTests.cs
@@ -9,14 +9,21 @@ using MediaBrowser.Controller.Entities.Audio;
 using MediaBrowser.Controller.Entities.Movies;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.Playlists;
-using MediaBrowser.Model.Querying;
 using Moq;
 using Xunit;
 
 namespace Jellyfin.Controller.Tests.Entities;
 
-public class PlaylistTests
+[Collection("LibraryManagerTests")]
+public sealed class PlaylistTests : IDisposable
 {
+    private readonly ILibraryManager? _previousLibraryManager = BaseItem.LibraryManager;
+
+    public void Dispose()
+    {
+        BaseItem.LibraryManager = _previousLibraryManager;
+    }
+
     [Fact]
     public void IsVisible_PlaylistWithNothingLeftInIt_IsHidden()
     {
-- 
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