How to mock System.DirectoryServices.SearchResult?

Question

If you have a method that needs to be tested that accepts a SearchResults list

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

How do you mock this SearchResult list?

Note. The use of low-level injection infrastructures (e.g. TypeMock) is not allowed.

Answer 1

I currently have this ugly code

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));
    }
}

which is used ...

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

Answer 2

. AD , , BOTH SearchResult DirectoryEntry - , , SearchResult, DirectoryEntry.

- . , , ISV AD. , . , :

      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

- - , :

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

  public void DoSomethingWithAUser(DirectoryObject user,...)

Answer 3

- SearchResult, ISearchResult.

Your particular implementation uses the SearchResult class, exposing it internally as much as you need, and then you can mock the interface when testing.