public SamplePlaylistViewModel() : base(new MockPlaylistView())
{
var musicFiles = new[]
{
new SampleMusicFile(new MusicMetadata(new TimeSpan(0, 3, 45), 320000)
{
Artists = new[] { @"Culture Beat" },
Title = @"Serenity (Epilog)",
}, @"C:\Users\Public\Music\Dancefloor\Culture Beat - Serenity"),
new SampleMusicFile(new MusicMetadata(new TimeSpan(0, 2, 2), 320000)
{
Artists = new[] { "First artist", "Second artist" },
Title = "This track has a very long title. Let's see how the UI handles this.",
}, ""),
new SampleMusicFile(new MusicMetadata(new TimeSpan(1, 33, 0), 320000)
{
Artists = new string[0],
Title = "",
}, @"C:\Users\Public\Music\Dancefloor\Culture Beat - Serenity"),
new MusicFile(x => { throw new InvalidOperationException("Sample exception."); }, @"C:\corruptfile.mp3")
};
var playlistManager = new PlaylistManager();
playlistManager.AddItems(musicFiles.Select(x => new PlaylistItem(x)));
PlaylistManager = playlistManager;
playlistManager.CurrentItem = playlistManager.Items.First();
}
public void PreviousAndNextDuringAddRemoveItems()
{
var manager = new PlaylistManager();
manager.AddAndReplaceItems(threeItems);
manager.CurrentItem = threeItems[0];
manager.NextItem();
Assert.IsTrue(manager.CanNextItem);
AssertHelper.PropertyChangedEvent(manager, x => x.CanNextItem, () => manager.RemoveItems(new[] { threeItems[2] }));
Assert.IsFalse(manager.CanNextItem);
AssertHelper.PropertyChangedEvent(manager, x => x.CanNextItem, () => manager.AddItems(new[] { threeItems[2] }));
Assert.IsTrue(manager.CanNextItem);
manager.NextItem();
Assert.AreEqual(threeItems[2], manager.CurrentItem);
manager.PreviousItem();
Assert.AreEqual(threeItems[1], manager.CurrentItem);
Assert.IsTrue(manager.CanPreviousItem);
AssertHelper.PropertyChangedEvent(manager, x => x.CanPreviousItem, () => manager.RemoveItems(new[] { threeItems[0] }));
Assert.IsFalse(manager.CanPreviousItem);
}
public void TotalDurationWithMetadataLoading()
{
var manager = new PlaylistManager();
Assert.AreEqual(TimeSpan.Zero, manager.TotalDuration);
var firstFile = new MockMusicFile(new MusicMetadata(TimeSpan.FromSeconds(10), 0), "");
manager.AddAndReplaceItems(new[] { new PlaylistItem(firstFile) });
var secondMetadata = new MusicMetadata(TimeSpan.FromSeconds(20), 0);
var secondFile = new MusicFile(async x =>
{
await Task.Delay(10);
return secondMetadata;
}, "");
manager.AddItems(new[] { new PlaylistItem(secondFile) });
Assert.IsTrue(manager.IsTotalDurationEstimated);
Assert.AreEqual(TimeSpan.FromSeconds(20), manager.TotalDuration);
AssertHelper.PropertyChangedEvent(manager, x => x.TotalDuration, () => secondFile.GetMetadataAsync().GetResult());
Assert.IsFalse(manager.IsTotalDurationEstimated);
Assert.AreEqual(TimeSpan.FromSeconds(30), manager.TotalDuration);
var thirdFile = new MockMusicFile(new MusicMetadata(TimeSpan.FromSeconds(30), 0), "");
AssertHelper.PropertyChangedEvent(manager, x => x.TotalDuration, () => manager.AddItems(new[] { new PlaylistItem(thirdFile) }));
Assert.AreEqual(TimeSpan.FromSeconds(60), manager.TotalDuration);
}
public void AddRemoveAndMoveItems()
{
var manager = new PlaylistManager();
Assert.AreEqual(0, manager.Items.Count);
manager.AddItems(threeItems);
Assert.AreEqual(3, manager.Items.Count);
manager.RemoveItems(new[] { threeItems[2] });
Assert.AreEqual(2, manager.Items.Count);
manager.AddAndReplaceItems(threeItems);
Assert.AreEqual(3, manager.Items.Count);
manager.MoveItems(2, new[] { manager.Items[0] });
Assert.IsTrue(manager.Items.SequenceEqual(new[] { threeItems[1], threeItems[2], threeItems[0] }));
}