public void Mixin_scores() { var frames = new[] { new Frame {Roll1 = 1, Roll2 = 2}, new Frame {Roll1 = 11, Roll2 = 12}}; var scores = new int[] {100, 200}; var sut = new Frames(); var result = sut.Mixin_scores(frames, scores); Equalidator.AreEqual(result, new[] { new Frame { Roll1 = 1, Roll2 = 2, Score=100 }, new Frame { Roll1 = 11, Roll2 = 12, Score=200 } }, true); }