public void ScoreSheet_ChanceUnset_RecordChanceAsValidValueOfEighteen() { // Arrange var dice = _testDieFactory.CreateDieEnumerable(new[] { 6, 3, 2, 4, 3 }); _diceCup.Setup(x => x.Dice).Returns(dice); // Act int?chanceScore = _scoreSheet.RecordChance(_diceCup.Object); //Assert _scoreSheet.Chance.Should().Be(18); }