测试代码如下：

usingSystem.Diagnostics;

usingWatiN.Core;

usingNUnit.Framework;

usingSystem;

usingBusinessLayer;

namespaceWebAppUITesting

{

   [TestFixture]

   publicclassUITesting

   {

       IEie=null;

       [TestFixtureSetUp]

       publicvoidInitTest()

       {

           ie =newIE("http://localhost/WebApp/Default.aspx");

       }

       //测试加法

       [Test]

       publicvoidAdditionTest()

       {

               intnumber1 = 1;

               intnumber2 = 2;

               //Watin测试代码

               ie.ShowWindow(NativeMethods.WindowShowStyle.Maximize);

               ie.TextField(Find.ById("num1")).TypeText(number1.ToString());

               ie.TextField(Find.ById("num2")).TypeText(number2.ToString());

               ie.Button(Find.ById("btnCheck")).Click();                             

               //预期结果

               Arithmeticac =newArithmetic();

               stringexpected = ac.addition(number1，number2).ToString();

               //实际结果

               stringactual = ie.Span(Find.ById("lblResult")).Text;

               //断言测试结果是否正确

               Assert.AreEqual(expected，actual);       

       }

       //测试异常处理

       [Test]

       publicvoidExceptionTest()

       {

           //Watin测试代码

           ie.TextField(Find.ById("num1")).TypeText("A");

           ie.TextField(Find.ById("num2")).TypeText("1");

           ie.Button(Find.ById("btnCheck")).Click();

           //预期结果

           stringexpected ="输入字符格式不正确！";

           //实际结果

           stringactual = ie.Span(Find.ById("lblResult")).Text;

           //断言测试结果是否正确

           Assert.AreEqual(expected， actual);

       }

       [TestFixtureTearDown]

       publicvoidClearTest()

       {

           ie.Close();

       }

   }

}

测试结果如下：

结束语

 在Nunit中使用Watin测试思路是这样的。如果有兴趣的话可以自己动手试试看，这是学习的佳途径。也可以下载附件中的代码进行学习。