Check that the As<T>() accept only interfaces.

[GillesTourreau]

• Proposed the rule: PosInfoMoq2007
• Description: "Can only add interfaces to the mock".

For example:

var mock = new Mock<IService>();
mock.As<Service>();   // Should raise an analyzer error.

With the following classes:

public interface IService
{
}

public class Service
{
}