如何模拟第三方Web服务LINQ数据提供程序？

Question

What is involved in mocking a LINQ web service data provider, which is made by a 3rd party, and is effectively a black box to me? Here is typical usage of that black box: (modified to protect the innocent, aka an NDA)

var conn = new RemoteServer (username,password);
var result = from row in conn.GetSomeData()
    where row.this == "Hello" && row.that != "World"
    select new { row.this, row.that, row.theOther };

I so far know result is IEnumerable<T> . Another usage example:

string something="xxx";
var result = from row in conn.SubscribeAsync()
    where row.this == something
    select new MyObject(something) { row.that, row.theOther };

(This will keep pushing data, perhaps a few items each second, and I'll be wanting to mock carefully timed sequences.)

I suppose my real question is, will it be as simple as:

 class MockRemoteServer
 {
     IEnumerable GetSomeData()
     {
          return new[]
          {
              new {this="1",that="2",theOther="special"},
              new {this="hello",that="world",theOther="something"}
          }
     }
 }

Or do I need to implement a full-on LINQ data provider myself? If so, any book or article recommendations on this? (My LINQ knowledge is currently based on a cover-to-cover read of Jon Skeet's C# In Depth, and not much else...)

Answer 1

A List<T> is generally enough (since it implements IEnumerable). However, if you want to know actual performance of your queries, nothing beats using the actual RemoteServer.