Moq: HttpContextBase.ApplicationInstance调用失败，模拟行为严格

Question

我正在尝试模拟一个API控制器方法的HttpContextWrapper，该方法应该返回UserHostAddress。我对执行没有控制权。我应该只对我所得到的代码进行单元测试。

我已经在StackOverflow上学习了一些例子，虽然我已经接近于实现我所需要的，但我无法克服这个例外：

Moq.MockException :严格的模拟行为导致HttpContextBase.ApplicationInstance调用失败。模拟上的所有调用都必须有相应的设置。

以下是我的单元测试方法：

    private static HttpRequestMessage CreateRequest(string url, string mthv, HttpMethod method)
    {
        var request = new HttpRequestMessage();

        var baseRequest = new Mock<HttpRequestBase>(MockBehavior.Strict);
        var baseContext = new Mock<HttpContextBase>(MockBehavior.Strict);

        baseRequest.Setup(br => br.UserHostAddress).Returns("127.0.0.1");
        baseContext.Setup(bc => bc.Request).Returns(baseRequest.Object);

        var baseContextWrapper = new Mock<HttpContextWrapper>(baseContext.Object.ApplicationInstance.Context);

        request.RequestUri = new Uri(url);
        request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue(mthv));
        request.Properties.Add("MS_HttpContext", baseContextWrapper.Object);
        request.Method = method;

        return request;
    }

    [Test]
    public void IsClientIpAddressReturned()
    {
        // Assign
        var request = CreateRequest("http://myserver/api/CustomerController", "application/json", HttpMethod.Get);

        var apiCachedController = new ApiCachedController();

        // Act
        RequestManager.RegisterRequestWithThread();

        var address = apiCachedController.GetClientIpAddress(request);

        // Assert
        Assert.AreEqual(address, "127.0.0.1");
    }

Answer 1

在CreateRequest方法中，您要在baseContext模拟中引用ApplicationInstance.Context。但是，在此属性上没有设置：

var baseContextWrapper = new Mock(baseContext.Object.ApplicationInstance.Context);

在模拟baseContext上设置上下文