But weren't we able to leave the engineer class empty initially?   

Wouldn’t it also blow up when the conductor calls message_board.slow_down! ?


On Tuesday, 21 January 2014 at 5:29, Jesse Wolgamott wrote:

> In train.rb:
> > \ No newline at end of file > + > + attr_reader :message_board > + > + def initialize(message_board) > + @message_board = message_board > + end > + > + def acknowledge_slow_down! > + message_board.confirm_slow_down! > + end > +end > + > +class MessageBoard  
> So, the MessageBoard class is empty --- do you think it will blow up when the .confirm_slow_down! is called?
>  
> —
> Reply to this email directly or view it on GitHub (https://github.com/RubyoffRails/train-message_expectations/pull/6/files#r9013589).
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