我怎样才能正确地莫克在HttpSessionStateBase的KeysCollection？ [英] How can I properly Mock the KeysCollection in HttpSessionStateBase?

问题描述

我安装在这里的例子此模拟会话对象：如何起订量索引属性

I setup this mock session object from the example here: How to MOQ an Indexed property

/// <summary>
/// HTTP session mockup.
/// </summary>
internal sealed class HttpSessionMock : HttpSessionStateBase
{
    private readonly Dictionary<string, object> objects = new Dictionary<string, object>();

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

一些示例code，以产生一个错误...

some sample code to produce an error...

var mockSession = new HttpSessionMock();
var keys = mockSession.Keys;

错误：的方法或操作不落实

我需要实现键的属性，但不能创建一个KeysCollection对象。

I need to implement the Keys property, but can't create a KeysCollection object.

什么是做到这一点的最好方法是什么？

What is the best way to do this?

编辑：[解决]

我最终改变的基础上给出的答案HttpSessionMock。这是我结束了。 （我也加入到System.Linq的参照点）;

I ended up changing the HttpSessionMock based on the answer given. This is what I ended up with. (I also added a reference to System.Linq).

internal sealed class HttpSessionMock : HttpSessionStateBase
{
    private readonly NameValueCollection objects = new NameValueCollection();

    public override object this[string name]
    {
        get { return (objects.AllKeys.Contains(name)) ? objects[name] : null; }
        set { objects[name] = (string)value; }
    }

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

请注意：此模拟会议将只存储字符串，而不是对象

note: this mock session will only store strings, not objects.

推荐答案

我发现原来的做法和接受的解决方案的结合，使对象的存储和执行键的属性：

I found a combination of the original approach and the accepted solution allows both storing of objects and implementing the keys property:

public class HttpSessionMock : HttpSessionStateBase
{
    private readonly NameValueCollection keyCollection = new NameValueCollection();
    private readonly Dictionary<string, object> objects = new Dictionary<string, object>();

    public override object this[string name]
    {
        get
        {
            object result = null;

            if (objects.ContainsKey(name))
            {
                result = objects[name];
            }

            return result;

        }
        set
        {
            objects[name] = value;
            keyCollection[name] = null;
        }
    }

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

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