C#的Unit Test如何根据exception来判断函数是否执行正确

添加ExpectedException属性， 然后指定异常类型， catch后决定Assert.IsTrue
The following class contains the method to test:

C#VB

using System;

namespace MyCSNamespace
{
public class DivisionClass
{
public int Divide(int numerator, int denominator)
{
return numerator / denominator;
}
}
}

The following test method tests the Divide method of the DivisionClass object. It tests for the existence of a DivideByZeroException.

C#VB

using Microsoft.VisualStudio.TestTools.UnitTesting;
using MyCSNamespace;

namespace MyCSTestProject
{
[TestClass()]
public class DivisionClassTest
{
[TestMethod()]
[ExpectedException(typeof(System.DivideByZeroException))]
public void DivideTest()
{
DivisionClass target = new DivisionClass();
int numerator = 4;
int denominator = 0;
int actual;
actual = target.Divide(numerator, denominator);
}
}
}