Question

I would like to test that instance of ChildClass calls something_interesting while omitting call to BaseClass.my_method

class BaseClass
  def my_method *args, &block
  end
end

class ChildClass < BaseClass
  def my_method first_arg, second_arg
    something_interesting
    super first_arg, second_arg
  end
end

If I write my test like this:

subject = ChildClass.new
subject.should_receive :something_interesting
BaseClass.any_instance.stub :my_method
subject.my_method

I get error:

ArgumentError: wrong number of arguments (3 for 2)

Any ideas why is that so? How to stub it out correctly?

Answer 1

You could stub super:

describe ChildClass do
  it 'calls something_interesting' do
    subject.should_receive(:something_interesting)
    subject.stub(:super)
    subject.my_method 'a', 'b'
  end
end