单元测试HttpResponseMessage

Question

我正在尝试对我的一些web服务进行单元测试。为此，我想断言我的一些HttpResponseMessage。为此，我正在做：

[TestMethod()]
public void LoginTest()
{
    HttpResponseMessage response = Request.CreateResponse(_accountController.Login("testuser", "testpw")); //CODE STOPS RUNNING AT THIS LINE
    Assert.IsTrue(response.IsSuccessStatusCode, "User unable to log in with correct login info");
}

其中Login是一种方法，如：

public IHttpActionResult Login(String userName, String userPassword)
{
    try
    {
        if (userName == null)
            return NotFound();
        //Logging in user etc.
        return Ok();
    }
    catch
    {
        return NotFound();
    }
}

但是，测试总是以失败的形式返回，即使Login()在我调试时返回Ok()。但是，在调试测试时，没有明显的错误或异常，输出显示的内容如下(我排除了只显示什么是Loaded或Unloaded的行)：

The thread 0x1190 has exited with code 0 (0x0).
Exception thrown: 'System.InvalidOperationException' in System.ServiceModel.dll
Exception thrown: 'System.ArgumentNullException' in System.Web.Http.dll
Exception thrown: 'System.Reflection.TargetInvocationException' in mscorlib.dll
Exception thrown: 'Microsoft.VisualStudio.TestPlatform.MSTestFramework.TestFailedException' in Microsoft.VisualStudio.TestPlatform.Extensions.VSTestIntegration.dll
Exception thrown: 'Microsoft.VisualStudio.TestPlatform.MSTestFramework.TestFailedException' in Microsoft.VisualStudio.TestPlatform.Extensions.VSTestIntegration.dll
The thread 0xaec has exited with code 0 (0x0).
Exception thrown: 'System.InvalidOperationException' in Microsoft.VisualStudio.TestPlatform.TestExecutor.Core.dll
Exception thrown: 'System.ServiceModel.CommunicationObjectAbortedException' in System.ServiceModel.dll
Exception thrown: 'System.ServiceModel.CommunicationObjectAbortedException' in System.ServiceModel.dll
Exception thrown: 'System.ServiceModel.CommunicationObjectAbortedException' in System.ServiceModel.Internals.dll
Exception thrown: 'System.IO.IOException' in System.dll
Exception thrown: 'System.ServiceModel.CommunicationObjectAbortedException' in System.ServiceModel.dll
Exception thrown: 'System.InvalidOperationException' in Microsoft.VisualStudio.TestPlatform.TestExecutor.Core.dll
Exception thrown: 'System.ServiceModel.CommunicationObjectAbortedException' in System.ServiceModel.dll
The program '[9936] vstest.executionengine.x86.exe' has exited with code 0 (0x0).
The program '[4084] TanulmanyiRendszer.Admin.vshost.exe' has exited with code -1 (0xffffffff).

我的猜测是，这不是应该将IHttpActionResult转换为HttpResponseMessage的方式。我怎样才能解决这个问题？

Answer 1

如果使用IHttpActionResult作为操作的返回类型，那么检查返回的实际类型是否是正确的派生类型。不需要检查HttpResponseMessage，因为这是框架所关心的

[TestMethod()]
public void LoginTest() {
    var response = _accountController.Login("testuser", "testpw") as OkResult;
    Assert.IsNotNull(response, "User unable to log in with correct login info");
}