Question

我需要伪造HttpContext.Current.Application表，以便从我的单元测试中访问它。

我需要将数据存储在某个地方。我认为我可以传递NameValueCollectionBase的实例但是因为我发现这个基类型没有索引器所以它看起来太复杂了。

那么伪造这部分HttpContext呢？可能吗？我该怎么做？ NUnit.Mocks会有帮助吗？

提前谢谢你......

Answer 1

请通过以下链接来帮助您。

http://www.java2s.com/Open-Source/CSharp/Web-Frameworks/MvcContrib/MvcContrib/TestHelper/Fakes/FakeHttpContext.cs.htm

Mocking and HttpContextBase.get_User()

由于 Venkat

Answer 2

如果您需要namevaluecollection base的索引，请使用以下代码

public static IEnumerable<KeyValuePair<string, string>> ToPairs(this NameValueCollection collection)
{
    if(collection == null)
    {
        throw new ArgumentNullException("collection");
    }

    return collection.Cast<string>().Select(key => new KeyValuePair<string, string>(key, collection[key]));
}

仅用于存储数据和传递测试方法，请使用上面的代码。

Answer 3

在这种情况下，我生成一些从System.Web.Abstractions中的基类派生的存根。我经常将此技术用于MVC应用程序，因为MVC / WebApi控制器包含对HttpContext（HttpContextBase）的抽象

这样我可以在我的单元/集成测试中找出HttpContext要求，这里是一个示例...

public class MockHttpApplicationState : HttpApplicationStateBase
{
    private IDictionary<string, object> _appState = new Dictionary<string, object>();

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

    public override object Get(string name)
    {
        return _appState[name];
    }

    public override object this[string name]
    {
        get
        {
            return _appState[name];
        }

        set
        {
            _appState[name] = value;
        }
    }
}

public class MockHttpContext : HttpContextBase
{
    private IDictionary<string, object> _appKeys;

    public MockHttpContext()
    {

    }

    /// <summary>
    /// Accepts a dictionary of app keys to supply to the HttpApplicationState instance
    /// </summary>
    /// <param name="applicationState"></param>
    public MockHttpContext(IDictionary<string,object> applicationState)
    {
        _appKeys = applicationState;
    }

    public override Cache Cache
    {
        get
        {                
            return HttpRuntime.Cache;
        }
    }

    public override HttpApplicationStateBase Application
    {
        get
        {
            var mockAppState = new MockHttpApplicationState();

            foreach (string key in _appKeys.Keys)
            {
                mockAppState.Add(key, _appKeys[key]);
            }

            return mockAppState;
        }
    }

    public override HttpRequestBase Request
    {
        get
        {
            return new HttpRequestWrapper(new HttpRequest(null,"http://localhost",null));
        }
    }
}

然后我的测试可以建立Controller和Http Context：

private readonly OnlineShop.MVC.Controllers.HomeController _controller = 
        new MVC.Controllers.HomeController(null,new UnitOfWork());

    [OneTimeSetUp]
    public void Init()
    {
        var appKeys = new Dictionary<string, object>();

        appKeys.Add("localhost", 1);

        var httpContext = new MockHttpContext(appKeys);

        _controller.ControllerContext = new ControllerContext()
        {
            Controller = _controller,
            RequestContext = new RequestContext(httpContext, new RouteData())    
        };                        
    }

    [Test]
    public void Index_Returns_HomeView()
    {            
        var view = _controller.Index() as ViewResult;
        var viewModel = view.Model as MVC.ViewModels.Home;

        Assert.IsInstanceOf<OnlineShop.MVC.ViewModels.Home>(viewModel);
        Assert.IsTrue(viewModel.FeaturedProducts.Count > 0);
    }

我的控制器知道它提供缓存和应用程序状态的环境HttpContextBase实例：

  public ActionResult Index()
    {                        
        string cacheKey = string.Format("FeaturedProducts-{0}",WebsiteId);
        IList<Product> productList = this.HttpContext.Cache[cacheKey] as IList<Product>;


        //My app keeps a list of website contexts in the Application. This test returns 1 based on the unit / int tests or a real world db value when hosted on IIS etc..
        int websiteId = (int)HttpContext.Application[this.Request.Url.Host];

如何伪造HttpContext进行单元测试？

3 个答案: