我只是在玩.NET 4.0的代码合同,并且必须丢失一些明显的东西,因为它们不像我期望的那样行事。单元测试代码合同
我一直使用一个简单的if ... then .. throw语句来在函数的开始处执行任何验证。
if (hours < 0 || hours > 8)
throw new ArgumentOutOfRangeException("hours", "Hours must be between 0 and 8");
我已经简单地更换这与
Contract.Requires<ArgumentOutOfRangeException>(hours >= 0 && hours <= 8, "Hours must be between 0 and 8");
,但它似乎永远不会扔在我的单元测试的问题。
public static DurationUnit HoursAsDuration(int hours)
{
Contract.Requires<ArgumentOutOfRangeException>(hours >= 0 && hours <= 8, "Hours must be between 0 and 8");
switch (hours)
{
case 1:
case 2:
return DurationUnit.Quarter;
case 3:
case 4:
return DurationUnit.Half;
case 5:
case 6:
return DurationUnit.ThreeQuarter;
case 7:
case 8:
return DurationUnit.Full;
default:
return DurationUnit.None;
}
}
[Test]
public void CanConvertToDuration()
{
Assert.AreEqual(DurationUnit.None, DateTimeUtility.HoursAsDuration(0));
Assert.AreEqual(DurationUnit.Quarter, DateTimeUtility.HoursAsDuration(1));
Assert.AreEqual(DurationUnit.Quarter, DateTimeUtility.HoursAsDuration(2));
Assert.AreEqual(DurationUnit.Half, DateTimeUtility.HoursAsDuration(3));
Assert.AreEqual(DurationUnit.Half, DateTimeUtility.HoursAsDuration(4));
Assert.AreEqual(DurationUnit.ThreeQuarter, DateTimeUtility.HoursAsDuration(5));
Assert.AreEqual(DurationUnit.ThreeQuarter, DateTimeUtility.HoursAsDuration(6));
Assert.AreEqual(DurationUnit.Full, DateTimeUtility.HoursAsDuration(7));
Assert.AreEqual(DurationUnit.Full, DateTimeUtility.HoursAsDuration(8));
//Would expect this to cause an issue
Assert.AreEqual(DurationUnit.None, DateTimeUtility.HoursAsDuration(9));
}
该测试返回true,但我会预期代码合同停止进入switch语句的“9”的值。这是预期的行为?
感谢帕斯卡尔,它确实清除了一些东西。我认为代码合同可以取代所有参数检查,但如果我希望他们在生产版本中,他们仍然需要保留。 – fluent 2011-03-03 09:08:34
更新:下面的Porges指出我正确的方向,编辑项目设置以启用生产版本中的合同。 – fluent 2011-03-03 09:18:30