1 files changed, 103 insertions, 0 deletions
diff --git a/tests/Jellyfin.Server.Implementations.Tests/Item/BaseItemRepositoryChildrenTests.cs b/tests/Jellyfin.Server.Implementations.Tests/Item/BaseItemRepositoryChildrenTests.cs
new file mode 100644
index 0000000000..5e045e9f83
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+++ b/tests/Jellyfin.Server.Implementations.Tests/Item/BaseItemRepositoryChildrenTests.cs
@@ -0,0 +1,103 @@
+using System;
+using System.Linq;
+using Emby.Server.Implementations.Data;
+using Jellyfin.Database.Implementations.Entities;
+using Jellyfin.Server.Implementations.Item;
+using MediaBrowser.Controller.Entities;
+using Xunit;
+using BaseItemKind = Jellyfin.Data.Enums.BaseItemKind;
+
+namespace Jellyfin.Server.Implementations.Tests.Item;
+
+/// <summary>
+/// Covers the children query the library scan runs against a folder: a version merged by hand is
+/// hidden from ordinary queries, but the scan has to see it or it takes the row for a new item and
+/// recreates it, splitting the version group apart again.
+/// </summary>
+public sealed class BaseItemRepositoryChildrenTests : SqliteDbTestFixture
+{
+    private static readonly Guid _folderId = Guid.Parse("aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa");
+    private static readonly Guid _primaryId = Guid.Parse("bbbbbbbb-bbbb-bbbb-bbbb-bbbbbbbbbbbb");
+    private static readonly Guid _mergedVersionId = Guid.Parse("cccccccc-cccc-cccc-cccc-cccccccccccc");
+    private static readonly Guid _ownedVersionId = Guid.Parse("dddddddd-dddd-dddd-dddd-dddddddddddd");
+
+    private readonly BaseItemRepository _repository;
+
+    public BaseItemRepositoryChildrenTests()
+    {
+        var itemTypeLookup = new ItemTypeLookup();
+        _repository = CreateBaseItemRepository(itemTypeLookup);
+
+        var movieTypeName = itemTypeLookup.BaseItemKindNames[BaseItemKind.Movie];
+        using var ctx = CreateDbContext();
+        ctx.BaseItems.Add(new BaseItemEntity
+        {
+            Id = _folderId,
+            Type = itemTypeLookup.BaseItemKindNames[BaseItemKind.Folder]!,
+            Name = "Movies",
+            Path = "/movies",
+            IsFolder = true
+        });
+        ctx.BaseItems.Add(CreateMovie(_primaryId, movieTypeName!, "Big Buck Bunny", "/media1/Big Buck Bunny/bbb-1080p.mp4", null, null));
+        ctx.BaseItems.Add(CreateMovie(_mergedVersionId, movieTypeName!, "Big Buck Bunny", "/media2/Big Buck Bunny/bbb-2160p.mp4", _primaryId, null));
+        ctx.BaseItems.Add(CreateMovie(_ownedVersionId, movieTypeName!, "Big Buck Bunny - 720p", "/media1/Big Buck Bunny/bbb-720p.mp4", _primaryId, _primaryId));
+        ctx.SaveChanges();
+    }
+
+    [Fact]
+    public void GetItemList_ChildrenOfFolder_ExcludesAlternateVersionsByDefault()
+    {
+        var result = _repository.GetItemList(new InternalItemsQuery { ParentId = _folderId });
+
+        var item = Assert.Single(result);
+        Assert.Equal(_primaryId, item.Id);
+    }
+
+    [Fact]
+    public void GetItemList_ChildrenOfFolderIncludingAlternateVersions_KeepsMergedVersion()
+    {
+        var result = _repository.GetItemList(new InternalItemsQuery
+        {
+            ParentId = _folderId,
+            IncludeAlternateVersions = true
+        });
+
+        Assert.Equal(2, result.Count);
+        Assert.Contains(result, i => i.Id.Equals(_primaryId));
+        Assert.Contains(result, i => i.Id.Equals(_mergedVersionId));
+    }
+
+    [Fact]
+    public void GetItemList_ChildrenOfFolderIncludingAlternateVersions_StillExcludesOwnedVersion()
+    {
+        // A version stored next to the file it belongs to is owned by its primary and is never
+        // resolved on its own, so the scan must not see it as a child of the folder either.
+        var result = _repository.GetItemList(new InternalItemsQuery
+        {
+            ParentId = _folderId,
+            IncludeAlternateVersions = true
+        });
+
+        Assert.DoesNotContain(result, i => i.Id.Equals(_ownedVersionId));
+    }
+
+    private static BaseItemEntity CreateMovie(Guid id, string typeName, string name, string path, Guid? primaryVersionId, Guid? ownerId)
+    {
+        return new BaseItemEntity
+        {
+            Id = id,
+            Type = typeName,
+            Name = name,
+            Path = path,
+            ParentId = _folderId,
+            TopParentId = _folderId,
+            PresentationUniqueKey = (primaryVersionId ?? id).ToString("N"),
+            PrimaryVersionId = primaryVersionId,
+            OwnerId = ownerId,
+            MediaType = "Video",
+            IsMovie = true,
+            IsFolder = false,
+            IsVirtualItem = false
+        };
+    }
+}