Backport pull request #18020 from jellyfin/release-12.z

Stop the library monitor from refreshing against a disposed host

Original-merge: 3aec32cb24

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

Backported-by: Cody Robibero <cody@robibe.ro>

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

@@ -0,0 +1,57 @@
+using System;
+using System.IO;
+using System.Threading.Tasks;
+using Emby.Server.Implementations.IO;
+using MediaBrowser.Controller.Configuration;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Model.Configuration;
+using Microsoft.Extensions.Logging.Abstractions;
+using Moq;
+using Xunit;
+
+namespace Jellyfin.Server.Implementations.Tests.IO;
+
+public class FileRefresherTests
+{
+    [Fact]
+    public async Task ProcessPathChanges_PathLookupThrows_StillRefreshesRemainingPaths()
+    {
+        var tempDir = Directory.CreateTempSubdirectory("filerefresher");
+        try
+        {
+            // Ordered so the failing path is dequeued first.
+            var failingPath = Path.Combine(tempDir.FullName, "failing", "episode.mkv");
+            var workingPath = Directory.CreateDirectory(Path.Combine(tempDir.FullName, "working")).FullName;
+
+            var workingItem = new Folder { Path = workingPath, Name = "working" };
+            var workingItemFound = new TaskCompletionSource();
+
+            var libraryManager = new Mock<ILibraryManager>(MockBehavior.Loose);
+            libraryManager.Setup(x => x.FindByPath(failingPath, null))
+                .Throws(new ObjectDisposedException("IServiceProvider"));
+            libraryManager.Setup(x => x.FindByPath(workingPath, null))
+                .Returns(workingItem)
+                .Callback(() => workingItemFound.TrySetResult());
+
+            var configurationManager = new Mock<IServerConfigurationManager>(MockBehavior.Loose);
+            configurationManager.Setup(x => x.Configuration)
+                .Returns(new ServerConfiguration { LibraryMonitorDelay = 1 });
+
+            using var refresher = new FileRefresher(
+                failingPath,
+                configurationManager.Object,
+                libraryManager.Object,
+                NullLogger.Instance);
+            refresher.AddPath(workingPath);
+
+            await workingItemFound.Task.WaitAsync(TimeSpan.FromSeconds(30), TestContext.Current.CancellationToken);
+
+            libraryManager.Verify(x => x.FindByPath(failingPath, null), Times.Once);
+        }
+        finally
+        {
+            tempDir.Delete(true);
+        }
+    }
+}