backend: add endpoint to add a whole album to a playlist

2026-09-24 12:04:28 +02:00
parent bd07b1134e
commit 4b708aa987
4 changed files with 203 additions and 0 deletions
@@ -0,0 +1,91 @@
+using ErrorOr;
+using Microsoft.EntityFrameworkCore;
+using Musify.Application.PlayLists;
+using Musify.Application.Tests.TestSupport;
+using Musify.Domain.Entities;
+using Xunit;
+
+namespace Musify.Application.Tests.PlayLists
+{
+    public sealed class AddAlbumToPlayListCommandHandlerTests : HandlerTestBase
+    {
+        private AddAlbumToPlayListCommandHandler CreateHandler() => new(Database, NoOpLogger<AddAlbumToPlayListCommandHandler>());
+
+        [Fact]
+        public async Task Handle_AddsAlbumTracksInAlbumOrder()
+        {
+            var owner = TestEntities.User();
+            var playList = TestEntities.PlayList(owner.Id);
+            var album = TestEntities.Album(owner.Id);
+            var first = TestEntities.Track(owner, "First");
+            var second = TestEntities.Track(owner, "Second");
+            await SeedAsync(
+                owner, playList, album, first, second,
+                new AlbumHasTrack { AlbumId = album.Id, TrackId = second.Id, TrackNumber = 2 },
+                new AlbumHasTrack { AlbumId = album.Id, TrackId = first.Id, TrackNumber = 1 });
+
+            var result = await CreateHandler().Handle(new AddAlbumToPlayListCommand(owner.Id, playList.Id, album.Id), TestContext.Current.CancellationToken);
+
+            Assert.False(result.IsError);
+            Assert.Equal(2, result.Value.AddedCount);
+            var links = await Database.PlayListHasTracks.OrderBy(link => link.Position).ToListAsync(TestContext.Current.CancellationToken);
+            Assert.Equal([first.Id, second.Id], links.Select(link => link.TrackId));
+            Assert.Equal([0, 1], links.Select(link => link.Position));
+        }
+
+        [Fact]
+        public async Task Handle_SkipsTracksAlreadyInPlayList_AndAppendsAfterThem()
+        {
+            var owner = TestEntities.User();
+            var playList = TestEntities.PlayList(owner.Id);
+            var album = TestEntities.Album(owner.Id);
+            var existing = TestEntities.Track(owner, "Existing");
+            var fresh = TestEntities.Track(owner, "Fresh");
+            await SeedAsync(
+                owner, playList, album, existing, fresh,
+                new AlbumHasTrack { AlbumId = album.Id, TrackId = existing.Id, TrackNumber = 1 },
+                new AlbumHasTrack { AlbumId = album.Id, TrackId = fresh.Id, TrackNumber = 2 },
+                new PlayListHasTrack { PlayListId = playList.Id, TrackId = existing.Id, Position = 4 });
+
+            var result = await CreateHandler().Handle(new AddAlbumToPlayListCommand(owner.Id, playList.Id, album.Id), TestContext.Current.CancellationToken);
+
+            Assert.Equal(1, result.Value.AddedCount);
+            var link = await Database.PlayListHasTracks.SingleAsync(l => l.TrackId == fresh.Id, TestContext.Current.CancellationToken);
+            Assert.Equal(5, link.Position);
+        }
+
+        [Fact]
+        public async Task Handle_PlayListMissing_ReturnsNotFound()
+        {
+            var result = await CreateHandler().Handle(new AddAlbumToPlayListCommand(1, Guid.NewGuid(), Guid.NewGuid()), TestContext.Current.CancellationToken);
+
+            Assert.Equal(ErrorType.NotFound, result.FirstError.Type);
+        }
+
+        [Fact]
+        public async Task Handle_NotOwner_ReturnsUnauthorized()
+        {
+            var owner = TestEntities.User(1, "owner");
+            var stranger = TestEntities.User(2, "stranger");
+            var playList = TestEntities.PlayList(owner.Id);
+            var album = TestEntities.Album(owner.Id);
+            await SeedAsync(owner, stranger, playList, album);
+
+            var result = await CreateHandler().Handle(new AddAlbumToPlayListCommand(stranger.Id, playList.Id, album.Id), TestContext.Current.CancellationToken);
+
+            Assert.Equal(ErrorType.Unauthorized, result.FirstError.Type);
+        }
+
+        [Fact]
+        public async Task Handle_AlbumMissing_ReturnsNotFound()
+        {
+            var owner = TestEntities.User();
+            var playList = TestEntities.PlayList(owner.Id);
+            await SeedAsync(owner, playList);
+
+            var result = await CreateHandler().Handle(new AddAlbumToPlayListCommand(owner.Id, playList.Id, Guid.NewGuid()), TestContext.Current.CancellationToken);
+
+            Assert.Equal(ErrorType.NotFound, result.FirstError.Type);
+        }
+    }
+}