class RSpec::Mocks::MessageExpectation

def invoke(parent_stub, *args, &block)
  if yield_receiver_to_implementation_block?
    args.unshift(orig_object)
  end
  if negative? || ((@exactly || @at_most) && (@actual_received_count == @expected_received_count))
    @actual_received_count += 1
    @failed_fast = true
    #args are the args we actually received, @argument_list_matcher is the
    #list of args we were expecting
    @error_generator.raise_expectation_error(@message, @expected_received_count, @argument_list_matcher, @actual_received_count, expectation_count_type, *args)
  end
  @order_group.handle_order_constraint self
  begin
    if implementation.present?
      implementation.call(*args, &block)
    elsif parent_stub
      parent_stub.invoke(nil, *args, &block)
    end
  ensure
    @actual_received_count += 1
  end
end