public void Should_have_error_Previous_Value(DirectionType directionType)
{
DirectionType prevDirectionType = directionType.PreviousValue();
DirectionType correctDirectionType = DirectionTypeList[(DirectionTypeList.IndexOf(directionType) - 1 + DirectionTypeList.Count()) % DirectionTypeList.Count()];
Assert.AreEqual(correctDirectionType, prevDirectionType);
}