代码之家 › 专栏 › 技术社区 › Simon Randy Burden

如何模拟System.DirectoryServices.SearchResult?

mocking active-directory unit-testing .net c#

Simon Randy Burden · 技术社区 · 15 年前

如果您有一个需要测试的方法,它将获取搜索结果列表

public virtual void ProcessResults(IList<SearchResult> list)
{
    //Code to tests here
}

如何模拟搜索结果列表?

注意:不允许使用低级注入框架(如typemock)。

3 回复 | 直到 6 年前

Simon Randy Burden 6 年前

现在我有一个丑陋的密码

public static class SearchResultFactory
{
    const BindingFlags nonPublicInstance = BindingFlags.NonPublic | BindingFlags.Instance;
    const BindingFlags publicInstance = BindingFlags.Public | BindingFlags.Instance;

    public static SearchResult Construct<T>(T anonInstance)
    {
        var searchResult = GetUninitializedObject<SearchResult>();
        SetPropertiesFieled(searchResult);
        var dictionary = (IDictionary)searchResult.Properties;
        var type = typeof(T);
        var propertyInfos = type.GetProperties(publicInstance);
        foreach (var propertyInfo in propertyInfos)
        {
            var value = propertyInfo.GetValue(anonInstance,null);
            var propertyCollection = GetUninitializedObject<ResultPropertyValueCollection>();
            var innerList = GetInnerList(propertyCollection);
            if (propertyInfo.PropertyType.IsArray)
            {
                var stringArray = (String[])value;
                foreach (var subValue in stringArray)
                {
                    innerList.Add(subValue);
                }
            }
            else
            {
                innerList.Add(value);
            }
            var lowerKey = propertyInfo.Name.ToLower(CultureInfo.InvariantCulture);
            dictionary.Add(lowerKey, propertyCollection);
        }
        return searchResult;
    }

    private static ArrayList GetInnerList(object resultPropertyCollection)
    {
        var propertyInfo = typeof(ResultPropertyValueCollection).GetProperty("InnerList", nonPublicInstance);
        return (ArrayList) propertyInfo.GetValue(resultPropertyCollection, null);
    }

    private static void SetPropertiesFieled(SearchResult searchResult)
    {
        var propertiesFiled = typeof(SearchResult).GetField("properties", nonPublicInstance);
        propertiesFiled.SetValue(searchResult, GetUninitializedObject<ResultPropertyCollection>());
    }

    private static T GetUninitializedObject<T>()
    {
        return (T) FormatterServices.GetUninitializedObject(typeof(T));
    }
}

这是用来…

var searchResult = SearchResultFactory.Construct(
         new
         {
             name = "test1",
             givenName = "John",
             sn = "Smith",
             rights = new String[] { "READ", "WRITE" }
         });

ScottBai 14 年前

,如果您打算进行任何数量的广告编程,并且希望能够测试它,那么可以考虑编写一个包装器来代替两个 SearchResult和DirectoryEntry——这样做的好处是,您不必为每个需要获取SearchResult或DirectoryEntry的函数编写两个函数。

我做了类似的事情。这不完全是一个晚上的项目,但完全值得,因为我正在研究一个ISV广告产品。你可以少包装,减少工作量。下面是一个伪代码布局,让您了解:

      DirectoryObject : IDirectoryObject, IDisposable (Important!)
          ctor (DirectoryEntry)
          ctor (SearchResult)
          ctor (string Path)
          string Path
          bool IsValid 
          Search(with a gazillion overloads)
          DirectoryObjectPropertyCollection Properties 
          //(which itself uses DirectoryObjectPropertyValueCollection to wrap PropertyValueCollection)

      //To get at the native underlying objects if necessary since I only wrapped commonly used elements
      DirectoryEntry NativeDirectoryEntry  
      SearchResult NativeSearchResult

      //So I know whether to grab the native SearchResult or DirectoryEntry
      IsDirectoryEntry
      IsSearchResult

这种方法——除了增加了可测试性之外——使我不必在我们共享的libaries中做如下的事情:

  public void DoSomethingWithAUser(DirectoryEntry user,...)
  public void DoSomethingWithAUser(SearchResult user,...)
  public void DoSomethingWithAUser(string userPath,...)

现在我们只有

  public void DoSomethingWithAUser(DirectoryObject user,...)

benPearce 15 年前

您可以围绕SearchResult编写自己的包装类,实现一些ISearchResult接口。

具体的实现使用searchresult类在内部公开您需要的内容,然后您可以在测试时模拟接口。