模拟WCF服务的简单方法? [英] Easy way to mock a WCF service?

问题描述

我有一个使用WCF服务的应用程序.现在，我想向应用程序添加单元测试.

I've got an app which is using a WCF service. Now I'd like to add unit tests to the app.

在某些情况下，我需要模拟WCF服务，因为有时很难从服务中获得所需的行为(例如，服务抛出特殊异常).

For some cases I need to mock the WCF service, since getting the desired behaviour from the service sometimes is tough (e.g. service throws special exceptions).

我可以向wcf客户端添加另一个接口，但这似乎有点愚蠢，因为客户端调用已经在使用接口了.

I could add yet another interface to the wcf client, but this seems a bit silly, since the client calls already are using an interface.

是否有一种简单的方法来模拟WCF服务?比创建另一个接口层并重定向其中的每个WCF调用更容易?

Is there an easy way to mock a WCF service? Easier than creating another interface layer and redirecting every single WCF call inside it?

大多数答案似乎对WCF服务的使用不太了解，因此需要澄清一下:
要从ViewModel使用WCF服务，我必须管理如下连接:

Most of the answers seem not to know much about WCF service using, so some clarification:
To use a WCF service from a ViewModel, I have to manage the connection something like this:

ChannelFactory<IMyWcfService> channelFactory = new ChannelFactory<IMyWcfService>("");
IMyWcfService proxy = channelFactory.CreateChannel();
proxy.CallMyStuff();
proxy.Close();

我不能只将ViewModel代理传递给WCF，因为需要为每个事务打开和关闭连接.因此，使用RhinoMock/NMock无效，因为它们需要一个将代理作为参数的ViewModel，如果使用WCF，则无法做到这一点.

I can't just pass the ViewModel the proxy to the WCF, since the connection needs to be opened and closed for every transaction. For this reason using RhinoMock/NMock would not work, since they need a ViewModel which gets the proxy as a parameter, which can't be done like this if you use WCF.

推荐答案

为什么不能使用 NMock2 直接模拟IMyWcfService接口?

Why can't you use something like NMock2 to mock the IMyWcfService interfaces directly?

如果需要能够即时创建新实例，请使用工厂"对客户端隐藏ChannelFactory<IMyWcfService>.这样，您可以替换工厂，为客户端提供一个创建模拟而不是真实代理的

If you need to be able to create new instances on the fly, use the Factory to hide the ChannelFactory<IMyWcfService> from the client. This way you can replace the factory, providing the client one which creates mocks instead of real proxies.

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