ASP/NET MVC:是否使用会话测试控制器?嘲笑?

查看Stephen Walther关于伪造控制器上下文的帖子:

ASP.NET MVC Tip #12 – Faking the Controller Context

[TestMethod]
public void TestSessionState()
{
    // Create controller
    var controller = new HomeController();


    // Create fake Controller Context
    var sessionItems = new SessionStateItemCollection();
    sessionItems["item1"] = "wow!";
    controller.ControllerContext = new FakeControllerContext(controller, sessionItems);
    var result = controller.TestSession() as ViewResult;


    // Assert
    Assert.AreEqual("wow!", result.ViewData["item1"]);

    // Assert
    Assert.AreEqual("cool!", controller.HttpContext.Session["item2"]);
}

例如,下面是我们如何管理表单auth的内容。我们有一个ISecurityContext:

public interface ISecurityContext
{
    bool IsAuthenticated { get; }
    IIdentity CurrentIdentity { get; }
    IPrincipal CurrentUser { get; set; }
}

具体实现如下:

public class SecurityContext : ISecurityContext
{
    private readonly HttpContext _context;

    public SecurityContext()
    {
        _context = HttpContext.Current;
    }

    public bool IsAuthenticated
    {
        get { return _context.Request.IsAuthenticated; }
    }

    public IIdentity CurrentIdentity
    {
        get { return _context.User.Identity; }
    }

    public IPrincipal CurrentUser
    {
        get { return _context.User; }
        set { _context.User = value; }
    }
}

var controller = new HomeController();
var context = MockRepository.GenerateStub<ControllerContext>();
context.Expect(x => x.HttpContext.Session["MyKey"]).Return("MyValue");
controller.ControllerContext = context;

看见 Scott Gu's post 更多细节。

我发现嘲弄是相当容易的。下面是一个使用moq模拟httpContextbase(包含请求、会话和响应对象)的示例。

[TestMethod]
        public void HowTo_CheckSession_With_TennisApp() {
            var request = new Mock<HttpRequestBase>();
            request.Expect(r => r.HttpMethod).Returns("GET");     

            var httpContext = new Mock<HttpContextBase>();
            var session = new Mock<HttpSessionStateBase>();

            httpContext.Expect(c => c.Request).Returns(request.Object);
            httpContext.Expect(c => c.Session).Returns(session.Object);

            session.Expect(c => c.Add("test", "something here"));            

            var playerController = new NewPlayerSignupController();
            memberController.ControllerContext = new ControllerContext(new RequestContext(httpContext.Object, new RouteData()), playerController);          

            session.VerifyAll(); // function is trying to add the desired item to the session in the constructor
            //TODO: Add Assertions   
        }

Scott Hanselman有一篇关于如何 create a file upload quickapp与MVC合作,讨论吸烟问题,并特别指出“如何模仿不友好的事物。”

我使用了以下解决方案-创建一个我的所有其他控制器都继承自的控制器。

public class TestableController : Controller
{

    public new HttpSessionStateBase Session
    {
        get
        {
            if (session == null)
            {
                session = base.Session ?? new CustomSession();
            }
            return session;
        }
    }
    private HttpSessionStateBase session;

    public class CustomSession : HttpSessionStateBase
    {

        private readonly Dictionary<string, object> dictionary; 

        public CustomSession()
        {
            dictionary = new Dictionary<string, object>();
        }

        public override object this[string name]
        {
            get
            {
                if (dictionary.ContainsKey(name))
                {
                    return dictionary[name];
                } else
                {
                    return null;
                }
            }
            set
            {
                if (!dictionary.ContainsKey(name))
                {
                    dictionary.Add(name, value);
                }
                else
                {
                    dictionary[name] = value;
                }
            }
        }

        //TODO: implement other methods here as needed to forefil the needs of the Session object. the above implementation was fine for my needs.

    }

}

然后按如下方式使用代码:

public class MyController : TestableController { }

ASP.NET unit testing 打电话 Ivonna .