public void ShuffleTwice_WhenRandomNumberGeneratorWorks_OrderIsDifferent()
{
var arr = new[]
{
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile()
};
Console.WriteLine("Original: {0}", string.Join(",", arr.Select(x => x.Id)));
var queue1 = new MediaQueue();
queue1.AddRange(arr);
var queue2 = new MediaQueue();
queue2.AddRange(arr);
// Randomize in quick succession to prove that the result is not the same
// Using Random() here would create two equal lists, hence the use of PCLCrypto.
queue1.ToggleShuffle();
queue2.ToggleShuffle();
Console.WriteLine("Queue1: {0}", string.Join(",", queue1.Cast<MediaFile>().Select(x => x.Id)));
Console.WriteLine("Queue2: {0}", string.Join(",", queue2.Cast<MediaFile>().Select(x => x.Id)));
CollectionAssert.AllItemsAreUnique(queue1.Cast<MediaFile>().Select(x => x.Id));
CollectionAssert.AllItemsAreUnique(queue2.Cast<MediaFile>().Select(x => x.Id));
CollectionAssert.AreNotEqual(queue1.Cast<MediaFile>(), queue2.Cast<MediaFile>());
Assert.AreEqual(arr[queue1.Index].Id, queue1.Cast<MediaFile>().ElementAt(queue1.Index).Id, "The current item has been moved");
Assert.AreEqual(arr[queue2.Index].Id, queue2.Cast<MediaFile>().ElementAt(queue2.Index).Id, "The current item has been moved");
}
public void WhenUnshufflingWorks_OrderIsSameAsBefore()
{
var arr = new[]
{
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile()
};
Console.WriteLine("Original: {0}", string.Join(",", arr.Select(x => x.Id)));
var queue = new MediaQueue();
Console.WriteLine("Current Index: {0}", queue.Index);
queue.AddRange(arr);
queue.ToggleShuffle();
Console.WriteLine("Shuffled: {0}", string.Join(",", queue.Cast<MediaFile>().Select(x => x.Id)));
queue.ToggleShuffle();
Console.WriteLine("Unshuffled: {0}", string.Join(",", queue.Cast<MediaFile>().Select(x => x.Id)));
CollectionAssert.AllItemsAreUnique(queue.Cast<MediaFile>().Select(x => x.Id));
CollectionAssert.AreEqual(queue.Cast<MediaFile>().Select(x => x.Id), arr.Cast<MediaFile>().Select(x => x.Id));
Assert.AreEqual(arr[queue.Index].Id, queue.Cast<MediaFile>().ElementAt(queue.Index).Id, "The current item has been moved");
Assert.AreEqual(arr.Length, queue.Count, "The array length is different");
}
public void WhenAddingItemsWhileShuffled_OrderIsSameAsBeforeButWithExtraItem()
{
var arr = new[]
{
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile(),
new MediaFile()
};
Console.WriteLine("Original: {0}", string.Join(",", arr.Select(x => x.Id)));
var queue = new MediaQueue();
Console.WriteLine("Current Index: {0}", queue.Index);
queue.AddRange(arr);
queue.ToggleShuffle();
queue.Add(new MediaFile());
Console.WriteLine("Shuffled: {0}", string.Join(",", queue.Cast<MediaFile>().Select(x => x.Id)));
queue.ToggleShuffle();
Console.WriteLine("Unshuffled: {0}", string.Join(",", queue.Cast<MediaFile>().Select(x => x.Id)));
CollectionAssert.AllItemsAreUnique(queue.Cast<MediaFile>().Select(x => x.Id));
Assert.AreEqual(arr[0].Id, queue.Cast<MediaFile>().ElementAt(0).Id);
Assert.AreEqual(arr[1].Id, queue.Cast<MediaFile>().ElementAt(1).Id);
Assert.AreEqual(arr[2].Id, queue.Cast<MediaFile>().ElementAt(2).Id);
Assert.AreEqual(arr[3].Id, queue.Cast<MediaFile>().ElementAt(3).Id);
Assert.AreEqual(arr[4].Id, queue.Cast<MediaFile>().ElementAt(4).Id);
Assert.AreEqual(arr[5].Id, queue.Cast<MediaFile>().ElementAt(5).Id);
Assert.AreEqual(arr[6].Id, queue.Cast<MediaFile>().ElementAt(6).Id);
Assert.AreEqual(arr[7].Id, queue.Cast<MediaFile>().ElementAt(7).Id);
Assert.AreEqual(arr[8].Id, queue.Cast<MediaFile>().ElementAt(8).Id);
Assert.AreEqual(arr[9].Id, queue.Cast<MediaFile>().ElementAt(9).Id);
Assert.AreEqual(arr[10].Id, queue.Cast<MediaFile>().ElementAt(10).Id);
Assert.AreEqual(arr.Length + 1, queue.Count, "The array length is different");
}
public void ShuffledAndRepeated()
{
var queue = new MediaQueue();
var tracks = new[]
{
new MediaFile(),
new MediaFile(),
};
queue.AddRange(tracks);
queue.ToggleShuffle();
queue.Repeat = RepeatType.RepeatOne;
IList<NotifyCollectionChangedEventArgs> collectionChangedEvents = new List<NotifyCollectionChangedEventArgs>();
IList<PropertyChangedEventArgs> propertyChangedEvents = new List<PropertyChangedEventArgs>();
queue.CollectionChanged += (sender, e) => collectionChangedEvents.Add(e);
queue.PropertyChanged += (sender, e) => propertyChangedEvents.Add(e);
queue.Clear();
Assert.AreEqual(0, queue.Count);
Assert.AreEqual(null, queue.Current);
Assert.AreEqual(-1, queue.Index);
Assert.AreEqual(RepeatType.RepeatOne, queue.Repeat);
Assert.AreEqual(false, queue.Shuffle);
Assert.AreEqual(1, propertyChangedEvents.Where(e => e.PropertyName == "Current").Count());
Assert.AreEqual(1, propertyChangedEvents.Where(e => e.PropertyName == "Index").Count());
Assert.AreEqual(1, propertyChangedEvents.Where(e => e.PropertyName == "Count").Count());
Assert.AreEqual(1, propertyChangedEvents.Where(e => e.PropertyName == "Shuffle").Count());
Assert.AreEqual(4, propertyChangedEvents.Count);
Assert.AreEqual(1, collectionChangedEvents.Where(e => e.NewItems == null && e.OldItems == null).Count());
Assert.AreEqual(1, collectionChangedEvents.Count);
}