gistfile1.builder

require 'rubygems'
require 'spec'

class Baz
  def call_foo_on(subject, &block)
    subject.foo(block)
  end
end

describe Baz do
  it "passes the expected block to the collaborator" do
    the_block = Proc.new {}
    collaborator = mock
    collaborator.should_receive(:foo).with(the_block)
    Baz.new.call_foo_on(collaborator, &the_block)
  end
end