asp.net - 在 ASP.net 中模拟 HttpSessionState 以进行 nunit 测试

Question

我已经看到很多关于 HttpSessionState 和 asp.net MVC 的讨论。
我正在尝试为 asp.net 应用程序编写测试，并想知道是否可以模拟 HttpSessionState，如果可以，如何模拟？

我目前正在使用 Rhino Mocks 和 Nunit

Answer 1

吉尔伯特，

也许我对你来说太晚了。我正在使用 MSpec，但我认为这些概念是相似的。我需要在被测 Controller 中模拟 HttpContext 的几个组件。

我从以下这些类开始模拟 HttpContextBase 中必要的(出于我的目的)组件。我只覆盖了类(class)中必要的部分。您的需求会因 Controller 中所需的模拟而异。一旦你理解了模式，就可以很容易地根据需要添加模拟。

public class MockHttpContext : HttpContextBase 
{

    private readonly HttpRequestBase _request = new MockHttpRequest();
    private readonly HttpServerUtilityBase _server = new MockHttpServerUtilityBase();
    private HttpSessionStateBase _session = new MockHttpSession();

    public override HttpRequestBase Request
    {
        get { return _request; }
    }
    public override HttpServerUtilityBase Server
    {
        get { return _server; }
    }
    public override HttpSessionStateBase Session
    {
        get { return _session; }
    }
}

public class MockHttpRequest : HttpRequestBase
{
    private Uri _url = new Uri("http://www.mockrequest.moc/Controller/Action");

    public override Uri Url
    {
        get { return _url; }
    }
}

public class MockHttpServerUtilityBase : HttpServerUtilityBase
{
    public override string UrlEncode(string s)
    {
        //return base.UrlEncode(s);     
        return s;       // Not doing anything (this is just a Mock)
    }
}


public class MockHttpSession : HttpSessionStateBase
{
    // Started with sample http://stackoverflow.com/questions/524457/how-do-you-mock-the-session-object-collection-using-moq
    // from http://stackoverflow.com/users/81730/ronnblack

    System.Collections.Generic.Dictionary<string, object> _sessionStorage = new   System.Collections.Generic.Dictionary<string,object>();
    public override object this[string name]
    {
        get { return _sessionStorage[name]; }
        set { _sessionStorage[name] = value; }
    }

    public override void Add(string name, object value)
    {
        _sessionStorage[name] = value;
    }
}

这是我如何设置 Controller 上下文以使用模拟 (MSpec)。这是为 Controller 上的实际测试设置的(测试派生自此类)

public abstract class BlahBlahControllerContext
{
    protected static BlahBlahController controller;

    Establish context = () =>
    {
        controller = new BlahBlahController();
        controller.ControllerContext = new ControllerContext()
        {
            Controller = controller,
            RequestContext = new RequestContext(new MockHttpContext(), new RouteData()),
        };
    };
}

为了进一步说明这里是使用模拟 session 的测试(MSpec 世界中的规范):

[Subject("ACCOUNT: Retrieve Password")]
public class retrieve_password_displays_retrieve_password2_page_on_success : BlahBlahControllerContext
{
    static ActionResult result;
    static RetrievePasswordModel model;

    Establish context = () =>
    {
        model = new RetrievePasswordModel()
        {
            UserName = "Mike"
        };
    };

    Because of = () =>
    {
        result = controller.RetrievePassword(model);
    };

    It should_return_a_RedirectToRouteResult = () => 
    { 
        result.is_a_redirect_to_route_and().action_name().ShouldEqual("RetrievePassword2"); 
    };

    It session_should_contain_UN_value = () =>
    {
        controller.HttpContext.Session["UN"].ShouldEqual("Mike");
    };

    It session_should_contain_PQ_value = () =>
    {
        controller.HttpContext.Session["PQ"].ShouldEqual("Question");
    };
}

我意识到这不使用 Rhino Mocks。我希望它说明了原理，读者可以将其应用到他们的特定工具和方法中。