8. Debugging with Ruby

Activity 8.01: Perform Debugging on a Voting Application

Solution

1. First up, let's write a simple test to ensure that our Controller class does indeed have access to the instantiated Logger class defined in the LoggerController initializer:

   tests/test_controller.rb
   def test_controller_logger
     t = Time.now
     machine = VotingMachine.new(t.month, t.year)
     controller = Controller.new(machine)
     assert_instance_of(Logger,            controller.instance_variable_get('@logger'))
   end

2. Next, let's extend our ControllerLogger module. We'll need to add an initializer first so that our parent Controller class can instantiate the Logger class. We'll call super at the end of the method, which will call initialize on the parent class passing through the same parameters (which is the default when super is called with no parameters):

   controller_logger...