1 files changed, 209 insertions, 0 deletions
diff --git a/tests/Jellyfin.Server.Implementations.Tests/Library/UserDataManagerTests.cs b/tests/Jellyfin.Server.Implementations.Tests/Library/UserDataManagerTests.cs
new file mode 100644
index 0000000000..bd14ca008d
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+++ b/tests/Jellyfin.Server.Implementations.Tests/Library/UserDataManagerTests.cs
@@ -0,0 +1,209 @@
+using System;
+using System.Collections.Generic;
+using Emby.Server.Implementations.Library;
+using Jellyfin.Database.Implementations;
+using Jellyfin.Database.Implementations.Entities;
+using Jellyfin.Database.Implementations.Locking;
+using Jellyfin.Database.Providers.Sqlite;
+using MediaBrowser.Controller.Configuration;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Model.Configuration;
+using Microsoft.Data.Sqlite;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Logging.Abstractions;
+using Moq;
+using Xunit;
+using AudioBook = MediaBrowser.Controller.Entities.AudioBook;
+
+namespace Jellyfin.Server.Implementations.Tests.Library;
+
+public sealed class UserDataManagerTests : IDisposable
+{
+    private readonly SqliteConnection _connection;
+    private readonly DbContextOptions<JellyfinDbContext> _dbOptions;
+    private readonly UserDataManager _userDataManager;
+    private readonly User _user;
+
+    public UserDataManagerTests()
+    {
+        _connection = new SqliteConnection("Data Source=:memory:");
+        _connection.Open();
+
+        _dbOptions = new DbContextOptionsBuilder<JellyfinDbContext>()
+            .UseSqlite(_connection)
+            .Options;
+
+        using (var ctx = CreateDbContext())
+        {
+            ctx.Database.EnsureCreated();
+        }
+
+        var factory = new Mock<IDbContextFactory<JellyfinDbContext>>();
+        factory.Setup(f => f.CreateDbContext()).Returns(CreateDbContext);
+
+        var config = new Mock<IServerConfigurationManager>();
+        config.SetupGet(c => c.Configuration).Returns(new ServerConfiguration());
+
+        _userDataManager = new UserDataManager(config.Object, factory.Object);
+        _user = new User("user", "auth-provider", "reset-provider")
+        {
+            Id = Guid.NewGuid()
+        };
+    }
+
+    public void Dispose()
+    {
+        _connection.Dispose();
+    }
+
+    private JellyfinDbContext CreateDbContext()
+    {
+        return new JellyfinDbContext(
+            _dbOptions,
+            NullLogger<JellyfinDbContext>.Instance,
+            new SqliteDatabaseProvider(null!, NullLogger<SqliteDatabaseProvider>.Instance),
+            new NoLockBehavior(NullLogger<NoLockBehavior>.Instance));
+    }
+
+    private AudioBook CreateAudioBook()
+    {
+        // GetUserDataKeys(): ["Author-Series-0001Book Title", "<item id N>"]
+        return new AudioBook
+        {
+            Id = Guid.NewGuid(),
+            Name = "Book Title",
+            Album = "Series",
+            AlbumArtists = new[] { "Author" },
+            IndexNumber = 1
+        };
+    }
+
+    private UserData CreateUserDataRow(AudioBook item, string key, long positionTicks)
+    {
+        return new UserData
+        {
+            ItemId = item.Id,
+            Item = null,
+            UserId = _user.Id,
+            User = null,
+            CustomDataKey = key,
+            PlaybackPositionTicks = positionTicks
+        };
+    }
+
+    [Fact]
+    public void GetUserData_RowsUnderCurrentAndRetiredKeys_PrefersCurrentKeyRow()
+    {
+        var item = CreateAudioBook();
+        var currentKey = item.GetUserDataKeys()[0];
+
+        // the retired-key row comes first to ensure selection is by key, not row order
+        item.UserData = new List<UserData>
+        {
+            CreateUserDataRow(item, "Author-Old Album-0001Old File Name", 111),
+            CreateUserDataRow(item, currentKey, 222)
+        };
+
+        var userData = _userDataManager.GetUserData(_user, item);
+
+        Assert.NotNull(userData);
+        Assert.Equal(currentKey, userData.Key);
+        Assert.Equal(222, userData.PlaybackPositionTicks);
+    }
+
+    [Fact]
+    public void GetUserData_NoPrimaryKeyRow_UsesNextCurrentKeyRow()
+    {
+        var item = CreateAudioBook();
+        var idKey = item.GetUserDataKeys()[1];
+
+        item.UserData = new List<UserData>
+        {
+            CreateUserDataRow(item, "Author-Old Album-0001Old File Name", 111),
+            CreateUserDataRow(item, idKey, 333)
+        };
+
+        var userData = _userDataManager.GetUserData(_user, item);
+
+        Assert.NotNull(userData);
+        Assert.Equal(idKey, userData.Key);
+        Assert.Equal(333, userData.PlaybackPositionTicks);
+    }
+
+    [Fact]
+    public void GetUserData_OnlyRetiredKeyRows_ReturnsRetiredKeyRow()
+    {
+        var item = CreateAudioBook();
+
+        item.UserData = new List<UserData>
+        {
+            CreateUserDataRow(item, "Author-Old Album-0001Old File Name", 111)
+        };
+
+        var userData = _userDataManager.GetUserData(_user, item);
+
+        Assert.NotNull(userData);
+        Assert.Equal(111, userData.PlaybackPositionTicks);
+    }
+
+    [Fact]
+    public void GetUserData_NoRows_ReturnsDefaultWithPrimaryKey()
+    {
+        var item = CreateAudioBook();
+        item.UserData = new List<UserData>();
+
+        var userData = _userDataManager.GetUserData(_user, item);
+
+        Assert.NotNull(userData);
+        Assert.Equal(item.GetUserDataKeys()[0], userData.Key);
+        Assert.Equal(0, userData.PlaybackPositionTicks);
+    }
+
+    [Fact]
+    public void GetUserData_RowsForOtherUsers_AreIgnored()
+    {
+        var item = CreateAudioBook();
+        var currentKey = item.GetUserDataKeys()[0];
+
+        var otherUserRow = CreateUserDataRow(item, currentKey, 999);
+        otherUserRow.UserId = Guid.NewGuid();
+
+        item.UserData = new List<UserData>
+        {
+            otherUserRow,
+            CreateUserDataRow(item, currentKey, 222)
+        };
+
+        var userData = _userDataManager.GetUserData(_user, item);
+
+        Assert.NotNull(userData);
+        Assert.Equal(222, userData.PlaybackPositionTicks);
+    }
+
+    [Fact]
+    public void GetUserDataBatch_DatabaseFallback_ResolvesRowsByKeyOrder()
+    {
+        // no preloaded navigation data, so the batch takes the database fallback
+        var fossilItem = CreateAudioBook();
+        var retiredItem = CreateAudioBook();
+
+        using (var ctx = CreateDbContext())
+        {
+            ctx.Users.Add(_user);
+            ctx.BaseItems.Add(new BaseItemEntity { Id = fossilItem.Id, Type = typeof(AudioBook).FullName! });
+            ctx.BaseItems.Add(new BaseItemEntity { Id = retiredItem.Id, Type = typeof(AudioBook).FullName! });
+
+            // the stale id-key row is inserted first so selection by row order would return it
+            ctx.UserData.AddRange(
+                CreateUserDataRow(fossilItem, fossilItem.GetUserDataKeys()[1], 111),
+                CreateUserDataRow(fossilItem, fossilItem.GetUserDataKeys()[0], 222),
+                CreateUserDataRow(retiredItem, "Author-Old Album-0001Old File Name", 333));
+            ctx.SaveChanges();
+        }
+
+        var result = _userDataManager.GetUserDataBatch([fossilItem, retiredItem], _user);
+
+        Assert.Equal(222, result[fossilItem.Id].PlaybackPositionTicks);
+        Assert.Equal(333, result[retiredItem.Id].PlaybackPositionTicks);
+    }
+}