Question

Mocking a concrete class with Rhino Mocks seems to work pretty easy when you have an empty constructor on a class:

public class MyClass{
     public MyClass() {}
}

But if I add a constructor that takes parameters and remove the one that doesn’t take parameters:

public class MyClass{
     public MyClass(MyOtherClass instance) {}
}

I tend to get an exception:

System.MissingMethodException : Can’t
find a constructor with matching
arguments

I’ve tried putting in nulls in my call to Mock or Stub, but it doesn’t work.

Can I create mocks and stubs of concrete classes that lack parameter-less constructors?

Answer 1

Yep. Just pass in the parameters in your StrictMock() call:

// New FruitBasket that can hold 50 fruits.
MockRepository mocks = new MockRepository();
FruitBasket basket = mocks.StrictMock<FruitBasket>(50);