public void TestDecrease()
{
Assert.AreEqual(WeekDays.Tuesday, EnumHelper.DecreaseValue(WeekDays.Friday, 3));
Assert.AreEqual(WeekDays.Tuesday, EnumHelper.DecreaseValue(WeekDays.Tuesday, 0));
Assert.AreEqual(WeekDays.Monday, EnumHelper.DecreaseValue(WeekDays.Tuesday, 22));
try
{
EnumHelper.DecreaseValue(WeekDays.Tuesday, 22, true);
Assert.Fail("Error expected");
}
catch (Exception ex)
{
Assert.AreEqual(ex.Message, "The modifier 22 exceeds the minimum possible value for WeekDays when applied on Tuesday");
}
}
