public void Should_find_several_sets() { //Arrange var finder = new SetFinder(new List <ICard> { CardFactory.OneBlueDiamond, CardFactory.OneBlueOval, CardFactory.OneBlueSquiggle, CardFactory.OneRedOval, CardFactory.OneYellowOval, CardFactory.ThreeBlueOval, CardFactory.TwoBlueOval }); //Act var setsFound = finder.Find(); //Assert foreach (var trio in setsFound) { Assert.True(trio.IsSet()); } Assert.Equal(3, setsFound.Count()); Assert.Contains(new CardTrio(CardFactory.OneBlueDiamond, CardFactory.OneBlueOval, CardFactory.OneBlueSquiggle), setsFound); Assert.Contains(new CardTrio(CardFactory.OneBlueOval, CardFactory.TwoBlueOval, CardFactory.ThreeBlueOval), setsFound); Assert.Contains(new CardTrio(CardFactory.OneBlueOval, CardFactory.OneRedOval, CardFactory.OneYellowOval), setsFound); }