public void Episodes_Should_Not_Duplicate_When_Reshuffling()
{
List <MediaItem> contents = Episodes(10);
// normally returns 10 5 7 4 3 6 2 8 9 1 1 (note duplicate 1 at end)
var state = new CollectionEnumeratorState {
Seed = 8
};
var groupedMediaItems = contents.Map(mi => new GroupedMediaItem(mi, null)).ToList();
var shuffledContent = new ShuffledMediaCollectionEnumerator(groupedMediaItems, state);
var list = new List <int>();
for (var i = 1; i <= 1000; i++)
{
shuffledContent.Current.IsSome.Should().BeTrue();
shuffledContent.Current.Do(x => list.Add(x.Id));
shuffledContent.MoveNext();
}
for (var i = 0; i < list.Count - 1; i++)
{
if (list[i] == list[i + 1])
{
Assert.Fail("List contains duplicate items");
}
}
}
public void State_Should_Reset_When_Invalid()
{
List <MediaItem> contents = Episodes(10);
var state = new CollectionEnumeratorState {
Index = 10, Seed = MagicSeed
};
var groupedMediaItems = contents.Map(mi => new GroupedMediaItem(mi, null)).ToList();
var shuffledContent = new ShuffledMediaCollectionEnumerator(groupedMediaItems, state);
shuffledContent.State.Index.Should().Be(0);
shuffledContent.State.Seed.Should().NotBe(MagicSeed);
}
public void State_Index_Should_Increment()
{
List <MediaItem> contents = Episodes(10);
var state = new CollectionEnumeratorState();
var shuffledContent = new ShuffledMediaCollectionEnumerator(contents, state);
for (var i = 0; i < 10; i++)
{
shuffledContent.State.Index.Should().Be(i);
shuffledContent.MoveNext();
}
}
public void State_Should_Impact_Iterator_Start()
{
List <MediaItem> contents = Episodes(10);
var state = new CollectionEnumeratorState {
Index = 5, Seed = MagicSeed
};
var shuffledContent = new ShuffledMediaCollectionEnumerator(contents, state);
for (var i = 6; i <= 10; i++)
{
shuffledContent.Current.IsSome.Should().BeTrue();
shuffledContent.Current.Map(x => x.Id).IfNone(-1).Should().Be(i);
shuffledContent.State.Index.Should().Be(i - 1);
shuffledContent.MoveNext();
}
}
public void Duplicate_Check_Should_Ignore_Single_Item()
{
List <MediaItem> contents = Episodes(1);
var state = new CollectionEnumeratorState();
var shuffledContent = new ShuffledMediaCollectionEnumerator(contents, state);
var list = new List <int>();
for (var i = 1; i <= 10; i++)
{
shuffledContent.Current.IsSome.Should().BeTrue();
shuffledContent.Current.Do(x => list.Add(x.Id));
shuffledContent.MoveNext();
}
list.Should().Equal(1, 1, 1, 1, 1, 1, 1, 1, 1, 1);
}
public void Episodes_Should_Shuffle()
{
List <MediaItem> contents = Episodes(10);
var state = new CollectionEnumeratorState();
var shuffledContent = new ShuffledMediaCollectionEnumerator(contents, state);
var list = new List <int>();
for (var i = 1; i <= 10; i++)
{
shuffledContent.Current.IsSome.Should().BeTrue();
shuffledContent.Current.Do(x => list.Add(x.Id));
shuffledContent.MoveNext();
}
list.Should().NotEqual(new[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 });
list.Should().BeEquivalentTo(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
}
