Question

Say I have a service:

UserService

And it has 2 public methods:

Method1, Method2

And I’m testing Method1, but Method1 makes a call to Method2.

How can I mock (or stub is the more correct word) the call to Method2.

If I mock UserService, that I can’t actually test Method1 now can I?

Answer 1

If I understand your question correctly, you can use CallBase:

Invoke base class implementation if no expectation overrides the member (a.k.a. “Partial Mocks” in Rhino Mocks)

Create your mock with CallBase = true, setup Method2 to return whatever value you want to test with, and then call Method1.

As an example:

class Program
{
    static void Main(string[] args)
    {
        var mock = new Mock<UserService> { CallBase = true };
        mock.Setup(m => m.Method2()).Returns("Mock 2");

        Console.WriteLine(mock.Object.Method1());
        Console.ReadLine();
    }
}

public class UserService
{
    public virtual string Method1()
    {
        return "Method 1 :: " + Method2();
    }

    public virtual string Method2()
    {
        return "Method 2";
    }
}