How to MOQ an Indexed property

c# tdd mocking moq
Ash picture Ash · Dec 4, 2008 · Viewed 25.6k times · Source

I am attempting to mock a call to an indexed property. I.e. I would like to moq the following:

object result = myDictionaryCollection["SomeKeyValue"];

and also the setter value

myDictionaryCollection["SomeKeyValue"] = myNewValue;

I am doing this because I need to mock the functionality of a class my app uses.

Does anyone know how to do this with MOQ? I've tried variations on the following:

Dictionary<string, object> MyContainer = new Dictionary<string, object>();
mock.ExpectGet<object>( p => p[It.IsAny<string>()]).Returns(MyContainer[(string s)]);

But that doesn't compile.

Is what I am trying to achieve possible with MOQ, does anyone have any examples of how I can do this?

Answer

Mike Scott picture Mike Scott · Dec 11, 2008

It's not clear what you're trying to do because you don't show the declaration of the mock. Are you trying to mock a dictionary?

MyContainer[(string s)] isn't valid C#.

This compiles:

var mock = new Mock<IDictionary>();
mock.SetupGet( p => p[It.IsAny<string>()]).Returns("foo");

Related questions

Moq - How to verify that a property value is set via the setter

Consider this class: public class Content { public virtual bool IsCheckedOut {get; private set;} public virtual void CheckOut() { IsCheckedOut = true; } public virtual void CheckIn() { //Do Nothing for now as demonstrating false positive test. } } The Checkin method is intentionally empty. Now i …

Read More
How do I mock a class without an interface?

I am working on .NET 4.0 using C# in Windows 7. I want to test the communication between some methods using mock. The only problem is that I want to do it without implementing an interface. Is that possible? I just read …

Read More
Mocking Static methods using Rhino.Mocks

Is it possible to mock a static method using Rhino.Mocks? If Rhino does not support this, is there a pattern or something which would let me accomplish the same?

Read More