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 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] }));
}
