你如何使用Moq模擬會話對象集合

Question

我使用shanselmann's MvcMockHelper類來模擬一些使用Moq的HttpContext的東西，但我遇到的問題是能夠將我的模擬會話對象分配給我的MVC控制器，然後能夠在單元測試中讀取相同的值以進行驗證。

我的問題是，如何將存儲集合分配給模擬會話對象，以允許諸如session [「UserName」] =「foo」之類的代碼保留「foo」值並使其在單元測試中可用。

Answer 1

我從Scott Hanselman的MVCMockHelper開始，添加了一個小類，並進行了如下所示的修改，以允許控制器正常使用會話，單元測試驗證由控制器設置的值。

/// <summary> 
/// A Class to allow simulation of SessionObject 
/// </summary> 
public class MockHttpSession : HttpSessionStateBase 
{ 
    Dictionary<string, object> m_SessionStorage = new Dictionary<string, object>(); 

    public override object this[string name] 
    { 
     get { return m_SessionStorage[name]; } 
     set { m_SessionStorage[name] = value; } 
    } 
} 

//In the MVCMockHelpers I modified the FakeHttpContext() method as shown below 
public static HttpContextBase FakeHttpContext() 
{ 
    var context = new Mock<HttpContextBase>(); 
    var request = new Mock<HttpRequestBase>(); 
    var response = new Mock<HttpResponseBase>(); 
    var session = new MockHttpSession(); 
    var server = new Mock<HttpServerUtilityBase>(); 

    context.Setup(ctx => ctx.Request).Returns(request.Object); 
    context.Setup(ctx => ctx.Response).Returns(response.Object); 
    context.Setup(ctx => ctx.Session).Returns(session); 
    context.Setup(ctx => ctx.Server).Returns(server.Object); 

    return context.Object; 
} 

//Now in the unit test i can do 
AccountController acct = new AccountController(); 
acct.SetFakeControllerContext(); 
acct.SetBusinessObject(mockBO.Object); 

RedirectResult results = (RedirectResult)acct.LogOn(userName, password, rememberMe, returnUrl); 
Assert.AreEqual(returnUrl, results.Url); 
Assert.AreEqual(userName, acct.Session["txtUserName"]); 
Assert.IsNotNull(acct.Session["SessionGUID"]); 

這不是完美的，但它足以用於測試。

Answer 2

我認爲你可以設置一個具體值的模擬期望它應該返回任何。嘲笑不是作爲實際的假貨，而是你可以斷言的行爲。

這聽起來像你實際上正在尋找一個適配器，你可以環繞會話，你可以在測試期間和運行時提供不同的實現它會返回HttpContext會話項？

這是否有意義？

Answer 3

我剛剛發現了一個很好的例子，說明Oxite團隊如何僞造他們的HttpSessionState並在該假冒中維護一個SessionStateItemCollection集合。這應該和我的情況一樣。

編輯：

URL這個例子是http://oxite.codeplex.com/sourcecontrol/changeset/view/33871?projectName=oxite#388065

Answer 4

使用起訂量3.0.308.2這裏是我的賬戶控制器設置在我的單元測試的例子：

private AccountController GetAccountController() 
    { 
     .. setup mocked services.. 

     var accountController = new AccountController (..mocked services..); 

     var controllerContext = new Mock<ControllerContext>(); 
     controllerContext.SetupGet(p => p.HttpContext.Session["test"]).Returns("Hello World"); 
     controllerContext.SetupGet(p => p.HttpContext.User.Identity.Name).Returns(_testEmail); 
     controllerContext.SetupGet(p => p.HttpContext.Request.IsAuthenticated).Returns(true); 
     controllerContext.SetupGet(p => p.HttpContext.Response.Cookies).Returns(new HttpCookieCollection()); 

     controllerContext.Setup (p => p.HttpContext.Request.Form.Get ("ReturnUrl")).Returns ("sample-return-url"); 
     controllerContext.Setup (p => p.HttpContext.Request.Params.Get ("q")).Returns ("sample-search-term"); 

     accountController.ControllerContext = controllerContext.Object; 

     return accountController; 
    } 

那麼你的控制器內方法如下應返回「Hello World」

string test = Session["test"].ToString(); 

Answer 5

我做了一個稍微複雜莫克比@RonnBlack

public class HttpSessionStateDictionary : HttpSessionStateBase 
{ 
    private readonly NameValueCollection keyCollection = new NameValueCollection(); 

    private readonly Dictionary<string, object> _values = new Dictionary<string, object>(); 

    public override object this[string name] 
    { 
     get { return _values.ContainsKey(name) ? _values[name] : null; } 
     set { _values[name] = value; keyCollection[name] = null;} 
    } 

    public override int CodePage 
    { 
     get { throw new NotImplementedException(); } 
     set { throw new NotImplementedException(); } 
    } 

    public override HttpSessionStateBase Contents 
    { 
     get { throw new NotImplementedException(); } 
    } 

    public override HttpCookieMode CookieMode 
    { 
     get { throw new NotImplementedException(); } 
    } 

    public override int Count 
    { 
     get { return _values.Count; } 
    } 

    public override NameObjectCollectionBase.KeysCollection Keys 
{ 
    get { return keyCollection.Keys; } 
} 

    public Dictionary<string, object> UnderlyingStore 
    { 
     get { return _values; } 
    } 

    public override void Abandon() 
    { 
     _values.Clear(); 
    } 

    public override void Add(string name, object value) 
    { 
     _values.Add(name, value); 
    } 

    public override void Clear() 
    { 
     _values.Clear(); 
    } 

    public override void CopyTo(Array array, int index) 
    { 
     throw new NotImplementedException(); 
    } 

    public override bool Equals(object obj) 
    { 
     return _values.Equals(obj); 
    } 

    public override IEnumerator GetEnumerator() 
    { 
     return _values.GetEnumerator(); 
    } 

    public override int GetHashCode() 
    { 
     return (_values != null ? _values.GetHashCode() : 0); 
    } 

    public override void Remove(string name) 
    { 
     _values.Remove(name); 
    } 

    public override void RemoveAll() 
    { 
     _values.Clear(); 
    } 

    public override void RemoveAt(int index) 
    { 
     throw new NotImplementedException(); 
    } 

    public override string ToString() 
    { 
     return _values.ToString(); 
    } 

    public bool Equals(HttpSessionStateDictionary other) 
    { 
     if (ReferenceEquals(null, other)) return false; 
     if (ReferenceEquals(this, other)) return true; 
     return Equals(other._values, _values); 
    } 
} 

發佈

Answer 6

謝謝你，@RonnBlack您的解決方案的答案！就我而言，我一直得到這個例外，因爲Session.SessionID爲空：

System.NotImplementedException was unhandled by user code 
    HResult=-2147467263 
    Message=The method or operation is not implemented. 
    Source=System.Web 
    StackTrace: 
     at System.Web.HttpSessionStateBase.get_SessionID() 

爲了解決這個問題，我實現@ RonnBlack的代碼中使用的起訂量Mock<HttpSessionStateBase>這種方式，代替他的MockHttpSession：

private readonly MyController controller = new MyController(); 

    [TestFixtureSetUp] 
    public void Init() 
    { 
     var session = new Mock<HttpSessionStateBase>(); 
     session.Setup(s => s.SessionID).Returns(Guid.NewGuid().ToString()); 
     var request = new Mock<HttpRequestBase>(); 
     var response = new Mock<HttpResponseBase>(); 
     var server = new Mock<HttpServerUtilityBase>(); 
     // Not working - IsAjaxRequest() is static extension method and cannot be mocked 
     // request.Setup(x => x.IsAjaxRequest()).Returns(true /* or false */); 
     // use this 
     request.SetupGet(x => x.Headers).Returns(
      new System.Net.WebHeaderCollection 
      { 
       {"X-Requested-With", "XMLHttpRequest"} 
      }); 

     var context = new Mock<HttpContextBase>(); 
     //context 
     context.Setup(ctx => ctx.Request).Returns(request.Object); 
     context.Setup(ctx => ctx.Response).Returns(response.Object); 
     context.Setup(ctx => ctx.Session).Returns(session.Object); 
     context.Setup(ctx => ctx.Server).Returns(server.Object); 
     context.SetupGet(x => x.Request).Returns(request.Object); 
     context.SetupGet(p => p.Request.Url).Returns(new Uri("http://www.mytesturl.com")); 
     var queryString = new NameValueCollection { { "code", "codeValue" } }; 
     context.SetupGet(r => r.Request.QueryString).Returns(queryString); 

     controller.ControllerContext = new ControllerContext(context.Object, new RouteData(), controller); 
    } 

有關詳細信息，請參閱http://weblogs.asp.net/gunnarpeipman/using-moq-to-mock-asp-net-mvc-httpcontextbase