2 files changed, 82 insertions, 1 deletions
diff --git a/Emby.Server.Implementations/SyncPlay/Group.cs b/Emby.Server.Implementations/SyncPlay/Group.cs
index c2e834ad58..38a0018a70 100644
--- a/Emby.Server.Implementations/SyncPlay/Group.cs
+++ b/Emby.Server.Implementations/SyncPlay/Group.cs
@@ -206,7 +206,8 @@ namespace Emby.Server.Implementations.SyncPlay
             foreach (var itemId in queue)
             {
                 var item = _libraryManager.GetItemById(itemId);
-                if (!item.IsVisibleStandalone(user))
+
+                if (item is null || !item.IsVisibleStandalone(user))
                 {
                     return false;
                 }
diff --git a/tests/Jellyfin.Server.Implementations.Tests/SyncPlay/GroupTests.cs b/tests/Jellyfin.Server.Implementations.Tests/SyncPlay/GroupTests.cs
new file mode 100644
index 0000000000..bd9e680cd9
--- /dev/null
+++ b/tests/Jellyfin.Server.Implementations.Tests/SyncPlay/GroupTests.cs
@@ -0,0 +1,80 @@
+using System;
+using System.Collections.Generic;
+using Emby.Server.Implementations.SyncPlay;
+using Jellyfin.Database.Implementations.Entities;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Controller.Session;
+using Microsoft.Extensions.Logging;
+using Moq;
+using Xunit;
+
+namespace Jellyfin.Server.Implementations.Tests.SyncPlay;
+
+public class GroupTests
+{
+    public GroupTests()
+    {
+        var mockLogger = new Mock<ILogger<Emby.Server.Implementations.SyncPlay.Group>>();
+        MockLoggerFactory = new Mock<ILoggerFactory>();
+        MockLoggerFactory.Setup(x => x.CreateLogger(It.IsAny<string>())).Returns(mockLogger.Object);
+
+        MockUserManager = new Mock<IUserManager>();
+        MockSessionManager = new Mock<ISessionManager>();
+        MockLibraryManager = new Mock<ILibraryManager>();
+        MockItem = new Mock<BaseItem>();
+        MockItem.Setup(i => i.IsVisibleStandalone(It.IsAny<User>())).Returns(true);
+    }
+
+    private Mock<ILoggerFactory> MockLoggerFactory { get; }
+
+    private Mock<IUserManager> MockUserManager { get; }
+
+    private Mock<ISessionManager> MockSessionManager { get; }
+
+    private Mock<ILibraryManager> MockLibraryManager { get; }
+
+    private Mock<BaseItem> MockItem { get; }
+
+    [Fact]
+    public void HasAccessToPlayQueue_ReturnsTrue_WhenItemsAreVisible()
+    {
+        MockLibraryManager.Setup(m => m.GetItemById(It.IsAny<Guid>())).Returns(MockItem.Object);
+
+        var group = new Emby.Server.Implementations.SyncPlay.Group(MockLoggerFactory.Object, MockUserManager.Object, MockSessionManager.Object, MockLibraryManager.Object);
+        var itemId = Guid.NewGuid();
+        var playlist = new List<Guid> { itemId };
+        group.PlayQueue.Reset();
+        group.PlayQueue.SetPlaylist(playlist);
+
+        Assert.Single(group.PlayQueue.GetPlaylist());
+        Assert.Equal(itemId, group.PlayQueue.GetPlaylist()[0].ItemId);
+
+        var user = new User("test-user", "auth-provider", "pwdreset-provider");
+        var result = group.HasAccessToPlayQueue(user);
+
+        Assert.True(result);
+    }
+
+    [Fact]
+    public void HasAccessToPlayQueue_ReturnsFalse_WhenLibraryReturnsNullForItem()
+    {
+        MockLibraryManager.Setup(m => m.GetItemById(It.IsAny<Guid>())).Returns((BaseItem?)null);
+
+        Assert.Null(MockLibraryManager.Object.GetItemById(Guid.NewGuid()));
+
+        var group = new Emby.Server.Implementations.SyncPlay.Group(MockLoggerFactory.Object, MockUserManager.Object, MockSessionManager.Object, MockLibraryManager.Object);
+        var itemId = Guid.NewGuid();
+        var playlist = new List<Guid> { itemId };
+        group.PlayQueue.Reset();
+        group.PlayQueue.SetPlaylist(playlist);
+
+        Assert.Single(group.PlayQueue.GetPlaylist());
+        Assert.Equal(itemId, group.PlayQueue.GetPlaylist()[0].ItemId);
+
+        var user = new User("test-user", "auth-provider", "pwdreset-provider");
+        var result = group.HasAccessToPlayQueue(user);
+
+        Assert.False(result);
+    }
+}