问MVC，MOQ单元测试Web方法

EN

    [HttpPost]
    public IHttpActionResult SampleMethod(SampleModel model)
    {
        var result= _myRepository.SampleMethod(model.Field1, model.Field2);

        return Ok();
    }

    /// <summary>
    /// Tests the SampleMethod is run
    /// </summary>
    [TestMethod]
    public void SampleMethod_Is_Run()
    {
        //Arrange
        mockRepository
          .Setup(x => x.SampleMethod(It.IsAny<string>(), It.IsAny<string>()))
          .Returns(It.IsAny<EmailItem>());  //forgot to add this the first time
        var controller = new MyController(mockRepository.Object);

        //Act
        controller.SampleMethod(It.IsAny<string>(), It.IsAny<string>());

        //Assert
        mockRepository.VerifyAll();
    }

    /// <summary>
    /// Tests the SampleMethod returns correct status code
    /// </summary>
    [TestMethod]
    public void SampleMethod_Returns_OK()
    {
        //Arrange
        mockRepository
          .Setup(x => x.SampleMethod(It.IsAny<string>(), It.IsAny<string>()))
          .Returns(It.IsAny<EmailItem>());  //forgot to add this the first time;
        var controller = new MyController(mockRepository.Object);
        controller.Request = new HttpRequestMessage();
        controller.Configuration = new HttpConfiguration();

        //Act
        var response = controller.SampleMethod(It.IsAny<string>(), It.IsAny<string>());

        //Assert
        Assert.IsInstanceOfType(response, typeof(OkResult));
    }

    [HttpPost]
    public IHttpActionResult SampleMethod(SampleModel model)
    {
        var emailItem= _myRepository.SampleMethod(model.Field1, model.Field2);

        //With this additional code, the test will fail
        EmailSender emailSender = new EmailSender();
        emailSender.BuildEmail(emailItem.ToAddress, emailItem.Subject);

        return Ok();
    }

    "System.Web.Http.HttpResponseException: Processing of the HTTP request resulted in an exception.  Please see the HTTP response returned by 'Response' property of this exception for details."