如何嘲笑在的UnitTest /假SmtpClient？ [英] How to mock/fake SmtpClient in a UnitTest?

问题描述

我想用它来在MS-测试的UnitTest假 System.Net.Mail.SmtpClient 。为此我添加System.dll中的假货Assembmly。然后，我创建一个 ShimsContext 和 StubSmtpClient 。

I want to use it to fake System.Net.Mail.SmtpClient in a MS-Test UnitTest. Therefor I added a Fakes Assembmly of System.dll. Then I create a ShimsContext and a StubSmtpClient.

using (ShimsContext.Create())
{
   StubSmtpClient client = new StubSmtpClient();               
}

不过，我该怎么办呢？
的最终目标将是写一个预计发送方法被调用 MAILMESSAGE 的对象的测试。

推荐答案

您可以创建一个将暴露将从SmtpClient

You can create an interface which will expose functions that will be used from SmtpClient

public interface ISmtpClient   
    {
        void Send(MailMessage mailMessage);
    }

然后创建具体的类，将做实的工作。

Then create your Concrete class which will do real job.

 public class SmtpClientWrapper : ISmtpClient
    {
        public SmtpClient SmtpClient { get; set; }
        public SmtpClientWrapper(string host, int port)
        {
            SmtpClient = new SmtpClient(host, port);
        }
        public void Send(MailMessage mailMessage)
        {
            SmtpClient.Send(mailMessage);
        }
    }

在您的测试方法，现在你可以嘲笑它和使用等;

In your test method now you can mock it and use like;

[TestMethod()]
        public void SendTest()
        {
            Mock<ISmtpClient> smtpClient = new Mock<ISmtpClient>();
            SmtpProvider smtpProvider = new SmtpProvider(smtpClient.Object);
            string @from = "[e-mail]";
            string to = "[e-mail]";
            bool send = smtpProvider.Send(@from, to);
            Assert.IsTrue(send);
        }

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