public void TwoClassic2RockClassicIsPlayingRepeatPriorityZero()
{
_store.SetupGetTags(new[]
{
new MusicTag {Id = Constants.Tags.Genre, Priority = 2},
new MusicTag {Id = Constants.Tags.Album, Priority = 3}
});
_store.Setup(s => s.GetRepeatPriority()).Returns(0);
var musicA = new Music("A") { Priority = 1 };
musicA[Constants.Tags.Genre] = "Classic";
var musicB = new Music("B") { Priority = 2 };
musicB[Constants.Tags.Genre] = "Rock";
var musicC = new Music("C") { Priority = 3 };
musicC[Constants.Tags.Genre] = "Classic";
var musicD = new Music("D") { Priority = 4 };
musicD[Constants.Tags.Genre] = "Rock";
_store.SetupGetMusic(musicA);
_store.SetupGetMusic(musicB);
_store.SetupGetMusic(musicC);
_store.SetupGetMusic(musicD);
_musicLibrary.Add(musicA);
_musicLibrary.Add(musicB);
_musicLibrary.Add(musicC);
_musicLibrary.Add(musicD);
var playList = new PlayList(_musicLibrary) { "A", "B", "C", "D" };
playList.SetPlaying("A");
playList.UpdateProbability();
const double totalPriority = 13d;
const double unitProbability = 1d / totalPriority;
_store.VerifyAll();
AreEqual(0, playList["A"].Probability);
AreEqual(unitProbability * musicB.Priority, playList["B"].Probability);
AreEqual(unitProbability * (musicC.Priority + 4d), playList["C"].Probability);
AreEqual(unitProbability * musicD.Priority, playList["D"].Probability);
AreEqual(0, playList["A"].CumulativeProbability);
AreEqual(unitProbability * 2, playList["B"].CumulativeProbability);
AreEqual(unitProbability * 9, playList["C"].CumulativeProbability);
AreEqual(unitProbability * 13, playList["D"].CumulativeProbability);
}