C# 如何对调用其他WCF的WCF服务进行单元测试

我已经设置了2个wcf服务，它们是 PdfService.svc 和 MailService.svc

邮件服务附加由PDFService ie生成的PDF

   public void SendMail(ICommand command)
    {
       // how should I handle this in Unit Test (mocks with NSubstitute)
       _service = new PdfService(_pdfSettings);
       var request = new DownloadRequest {FileName = "form.pdf", 
                                          FormEntry = command.FormEntry };
       var thefile = _service.DownloadFile(request);

       sendEmail(command.Mail, thefile.FileByteStream);
    }

我想知道如何在测试邮件服务时删除PdfService，这对于将wcf与wcf通信是个坏主意吗

谢谢

您可能想使用和

一般的想法是在方法调用或对象构造函数中将服务传递给方法。根据您提供的代码片段，我将按以下方式重写：

//Method Call
IPdfService mockService = new MockPdfService() // this is a mock that implements your interface
SendMail(cmd, mockService);

//Method
public void SendMail(ICommand command, IPdfService service)
{
   // how should I handle this in Unit Test (mocks with NSubstitute)
   _service = new PdfService(_pdfSettings);
   var request = new DownloadRequest {FileName = "form.pdf", 
                                      FormEntry = command.FormEntry };
   var thefile = service.DownloadFile(request);

   sendEmail(command.Mail, thefile.FileByteStream);
}

在mockService中，您可以添加诊断帮助，然后在sendmail调用后编写断言，以查看模拟中发生的情况

也许更好的方法是让主类构造函数获取服务对象，然后重写方法调用，如下所示：

public class MyClass
{
    private IPdfService _pdfService;

    public MyClass()
    {
        _pdfService = new PdfService(_pdfSettings);
    }        

    // Call this with your Mock pdfService
    public MyClass(IPdfService pdfService)
    {
        _pdfService = pdfSerivce;
    }

    public void SendMail(ICommand command)
    {
        var request = new DownloadRequest  { FileName = "form.pdf", FormEntry = command.FormEntry };
        var thefile = _pdfService.DownloadFile(request);
        sendEmail(command.Mail, thefile.FileByteStream)
    }
}

---

您可能已经考虑过这一点——单独编写单元测试，并相互进行模拟怎么样。是的，编写包含这两种服务的集成单元测试是很棘手的。邮件服务实现需要一个DI构造函数，该构造函数接受pdf服务的接口，这将允许您在测试期间通过存根实现。