假设您已对Moq已经有所了解，我们经常会遇到多个Interface，在这个情况下我们如何去Mock它们呢，看下面的示例：
定义下如下的Interface:
1: public interface IFirstInterface
2: {
3: int SomeMethodOnFirstInterface();
4: }
5:
6: public interface ISecondInterface
7: {
8: int SomeMethodOnSecondInterface();
9:
10: }
11:
12: public interface SomeClassImplementingInterfaces : IFirstInterface, ISecondInterface
13: {
14:
15: }
然后定义一个Generic方法实现两个Interface 特别的方法相加，返回结果：
1: public class SomeClass
2: {
3: public static int MultipleInterfaceUser<T>(T x)
4: where T : IFirstInterface, ISecondInterface
5: {
6: IFirstInterface f = (IFirstInterface)x;
7: ISecondInterface s = (ISecondInterface)x;
8:
9: return f.SomeMethodOnFirstInterface() + s.SomeMethodOnSecondInterface();
10: }
11: }
让我们来看如何Mock它们：
1: [Test]
2: public void MultipleInterfaceTest()
3: {
4: Mock<SomeClassImplementingInterfaces> c =
5: new Mock<SomeClassImplementingInterfaces>();
6:
7: Mock<IFirstInterface> firstMock = c.As<IFirstInterface>();
8: firstMock.Setup(m => m.SomeMethodOnFirstInterface())
9: .Returns(2);
10:
11: Mock<ISecondInterface> secondMock = firstMock.As<ISecondInterface>();
12: secondMock.Setup(m => m.SomeMethodOnSecondInterface())
13: .Returns(4);
14:
15: int returnValue =
16: SomeClass.MultipleInterfaceUser<SomeClassImplementingInterfaces>(c.Object);
17:
18: Assert.That(returnValue, Is.EqualTo(6));
19: }
注意这里使用As方法，增加一个指定的Interface到Mock．下面这个方法也可以Pass:
1: [Test]
2: public void MultipleInterfaceTest2()
3: {
4: Mock<SomeClassImplementingInterfaces> c =
5: new Mock<SomeClassImplementingInterfaces>();
6:
7: c.Setup(m => m.SomeMethodOnFirstInterface()).Returns(2);
8: c.Setup(m => m.SomeMethodOnSecondInterface()).Returns(4);
9:
10: int returnValue =
11: SomeClass.MultipleInterfaceUser<SomeClassImplementingInterfaces>(c.Object);
12:
13: Assert.That(returnValue, Is.EqualTo(6));
14: }
您可以下载Moq,NUnit测试以上代码．Moq框架对UnitTest，TDD有着极大的意义，在后面有时间会介绍更多．希望对您有帮助．
作者：Petter Liu
出处：http://www.cnblogs.com/wintersun/
本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。
该文章也同时发布在我的独立博客中-Petter Liu Blog。
