A simple method for always obtaining a future date.

CSharp_Nunit_AlwaysObtainAFutureDate_Example.cs

//The RIGHT way
[Test]
public void GetConversionRate_DateFutureParameter_ThrowsException()
{
  //This will always return a date that will be in the future
  DateTime future = DateTime.Now.AddYears(1);
  Assert.Throws( typeof(CurrencyConversionException),
                 () => GrandTrunkCurrencyConversionService.Instance
                       .GetConversionRate(TEST_CURRENCY_NAME_US_DOLLAR,
  				         TEST_CURRENCY_NAME_AU_DOLLAR, 
  				         future) );
}

//The NOT SO RIGHT way
[Test]
public void GetConversionRate_DateFutureParameter_ThrowsException()
{
  //Perhaps no one will run this unit test in 10 years. But what if 
  //someone will?
  DateTime notReallyFuture = new DateTime(2023,1,1);
  Assert.Throws( typeof(CurrencyConversionException),
                     () => GrandTrunkCurrencyConversionService.Instance
	                   .GetConversionRate(TEST_CURRENCY_NAME_US_DOLLAR,
  					      TEST_CURRENCY_NAME_AU_DOLLAR, 
  					      notReallyFuture) );	
}