1 files changed, 112 insertions, 0 deletions
diff --git a/tests/Jellyfin.Server.Implementations.Tests/SessionManager/RewatchPlayStateTests.cs b/tests/Jellyfin.Server.Implementations.Tests/SessionManager/RewatchPlayStateTests.cs
new file mode 100644
index 0000000000..dd2e935feb
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+++ b/tests/Jellyfin.Server.Implementations.Tests/SessionManager/RewatchPlayStateTests.cs
@@ -0,0 +1,112 @@
+using System;
+using System.Reflection;
+using System.Threading.Tasks;
+using Jellyfin.Database.Implementations.Entities;
+using MediaBrowser.Controller;
+using MediaBrowser.Controller.Configuration;
+using MediaBrowser.Controller.Devices;
+using MediaBrowser.Controller.Drawing;
+using MediaBrowser.Controller.Dto;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Entities.TV;
+using MediaBrowser.Controller.Events;
+using MediaBrowser.Controller.Library;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging.Abstractions;
+using Moq;
+using Xunit;
+
+namespace Jellyfin.Server.Implementations.Tests.SessionManager;
+
+[Collection("LibraryManagerTests")]
+public sealed class RewatchPlayStateTests : IDisposable
+{
+    private const long ResumeThresholdTicks = 100 * TimeSpan.TicksPerSecond;
+
+    private static readonly DateTime _previousPlayDate = new(2026, 1, 1, 0, 0, 0, DateTimeKind.Utc);
+
+    private readonly ILibraryManager? _previousLibraryManager;
+
+    public RewatchPlayStateTests()
+    {
+        _previousLibraryManager = BaseItem.LibraryManager;
+
+        // Resolves the (empty) alternate versions of the episode when the stop propagates its played state
+        BaseItem.LibraryManager = Mock.Of<ILibraryManager>();
+    }
+
+    public void Dispose()
+    {
+        BaseItem.LibraryManager = _previousLibraryManager!;
+    }
+
+    [Theory]
+    [InlineData(3 * TimeSpan.TicksPerSecond, false)]
+    [InlineData(600 * TimeSpan.TicksPerSecond, true)]
+    public async Task RewatchOfPlayedEpisode_OnlyCountsPastResumeThreshold(long stopPositionTicks, bool expectDateUpdated)
+    {
+        var data = new UserItemData { Key = "episode", Played = true, LastPlayedDate = _previousPlayDate };
+        await using var sessionManager = CreateSessionManager(data);
+        var user = new User("test", "default", "default");
+        var episode = new Episode { Id = Guid.NewGuid() };
+
+        Invoke(sessionManager, "OnPlaybackStart", user, episode);
+        Assert.Equal(_previousPlayDate, data.LastPlayedDate);
+
+        Invoke(sessionManager, "OnPlaybackStopped", user, episode, stopPositionTicks, false);
+        Assert.True(data.Played);
+        Assert.Equal(expectDateUpdated, data.LastPlayedDate > _previousPlayDate);
+    }
+
+    [Fact]
+    public async Task PlaybackStartOfUnplayedEpisode_UpdatesLastPlayedDate()
+    {
+        var data = new UserItemData { Key = "episode", LastPlayedDate = _previousPlayDate };
+        await using var sessionManager = CreateSessionManager(data);
+
+        Invoke(sessionManager, "OnPlaybackStart", new User("test", "default", "default"), new Episode { Id = Guid.NewGuid() });
+
+        Assert.True(data.LastPlayedDate > _previousPlayDate);
+    }
+
+    private static Emby.Server.Implementations.Session.SessionManager CreateSessionManager(UserItemData data)
+    {
+        var userDataManager = new Mock<IUserDataManager>();
+        userDataManager
+            .Setup(m => m.GetUserData(It.IsAny<User>(), It.IsAny<BaseItem>()))
+            .Returns(data);
+        userDataManager
+            .Setup(m => m.UpdatePlayState(It.IsAny<BaseItem>(), It.IsAny<UserItemData>(), It.IsAny<long?>()))
+            .Callback<BaseItem, UserItemData, long?>((_, d, position) => d.PlaybackPositionTicks = position >= ResumeThresholdTicks ? position.Value : 0)
+            .Returns(false);
+
+        return new Emby.Server.Implementations.Session.SessionManager(
+            NullLogger<Emby.Server.Implementations.Session.SessionManager>.Instance,
+            Mock.Of<IEventManager>(),
+            userDataManager.Object,
+            Mock.Of<IServerConfigurationManager>(),
+            Mock.Of<ILibraryManager>(),
+            Mock.Of<IUserManager>(),
+            Mock.Of<IMusicManager>(),
+            Mock.Of<IDtoService>(),
+            Mock.Of<IImageProcessor>(),
+            Mock.Of<IServerApplicationHost>(),
+            Mock.Of<IDeviceManager>(),
+            Mock.Of<IMediaSourceManager>(),
+            Mock.Of<IHostApplicationLifetime>());
+    }
+
+    private static void Invoke(Emby.Server.Implementations.Session.SessionManager sessionManager, string name, params object?[] args)
+    {
+        var parameterTypes = Array.ConvertAll(args, a => a!.GetType());
+        parameterTypes[1] = typeof(BaseItem);
+        if (args.Length > 2)
+        {
+            parameterTypes[2] = typeof(long?);
+        }
+
+        typeof(Emby.Server.Implementations.Session.SessionManager)
+            .GetMethod(name, BindingFlags.Instance | BindingFlags.NonPublic, parameterTypes)!
+            .Invoke(sessionManager, args);
+    }
+}