Question

The scenario:

• Visual Studio 2010, ASP.NET web application
• Create a web service class and give it some WebMethod-attributed methods
• Have Visual Studio auto-generate unit tests for the methods, by right-clicking in the class definition and choosing Create Unit Tests...

• Note that the generated code for each test includes this boilerplate:

  // TODO: Ensure that the UrlToTest attribute specifies a URL to an ASP.NET page 
  // (for example, http://.../Default.aspx). This is necessary for the unit test to 
  // be executed on the web server, whether you are testing a page, web service, or 
  // a WCF service.
  [TestMethod]
  [HostType("ASP.NET")]
  [AspNetDevelopmentServerHost("C:\\...\\ProjectName", "/")]
  [UrlToTest("http://localhost:59733/")]
  public void MethodNameTest()
  

• Add in Default.aspx to UrlToTest, as requested by the comment:

  [UrlToTest("http://localhost:59733/Default.aspx")]
  

• Run all tests in the class

The problem:

Inconsistently, some tests fail with

The communication channel with ASP.NET could not be configured. Requested Service not found

Which tests fail and which tests pass can vary from run to run. There appears to be no pattern to the failures, but it’s never the case that all successfully run.

What’s going wrong?

Answer 1

Is it the case that the page you’ve specified in UrlToTest always performs a Response.Redirect on load? Because if it is, this will the the cause of the failures you’re seeing.

Change the URL specified in UrlToTest to that of a page that does not perform a Response.Redirect, and your tests should run fine.