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如何模拟 HttpContext.Current.Session 进行单元测试?

Patricia Arquette
Patricia Arquette原创
2025-01-09 06:36:50693浏览

How to Mock HttpContext.Current.Session for Unit Testing?

利用 HttpContext.Current.Session 的单元测试代码

问题:

尝试时为了对 Web 服务进行单元测试,我在设置时遇到空引用异常HttpContext.Current.Session 值。尽管使用 SimpleWorkerRequest 创建上下文,HttpContext.Current.Session 仍然为空。如何在单元测试中初始化当前会话?

答案:

要模拟 HttpContext 及其会话对象,您可以采用以下两种方法之一:

  1. 使用反射:

    <br>public static HttpContext FakeHttpContext()<br>{<br> var httpRequest = new HttpRequest("", "http://example.com/" , "");<br> var stringWriter = new StringWriter();<br> var httpResponse = new HttpResponse(stringWriter);<br> var httpContext = new HttpContext(httpRequest, httpResponse);<p>var sessionContainer = new HttpSessionStateContainer("id", new SessionStateItemCollection(),</p><pre class="brush:php;toolbar:false">                                     new HttpStaticObjectsCollection(), 10, true,
                                         HttpCookieMode.AutoDetect,
                                         SessionStateMode.InProc, false);
    

    httpContext .Items["AspSession"] = typeof(HttpSessionState).GetConstructor(

                             BindingFlags.NonPublic | BindingFlags.Instance,
                             null, CallingConventions.Standard,
                             new[] { typeof(HttpSessionStateContainer) },
                             null)
                     .Invoke(new object[] { sessionContainer });
    

    return httpContext;
    }

  2. 使用SessionStateUtility:

    SessionStateUtility.AddHttpSessionStateToContext(httpContext, sessionContainer);<br> 

一旦你有创建了模拟 HttpContext,您可以将其设置为您的单元的当前上下文测试:

<br>HttpContext.Current = MockHelper.FakeHttpContext();<br>

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