require File.expand_path(File.dirname(__FILE__) + '/edgecase') # Project: Create a Proxy Class # # In this assignment, create a proxy class (one is started for you # below). You should be able to initialize the proxy object with any # object. Any messages sent to the proxy object should be forwarded # to the target object. As each message is sent, the proxy should # record the name of the method send. # # The proxy class is started for you. You will need to add a method # missing handler and any other supporting methods. The specification # of the Proxy class is given in the AboutProxyObjectProject koan. class Proxy def initialize(target_object) @object = target_object # ADD MORE CODE HERE end # WRITE CODE HERE end # The proxy object should pass the following Koan: # class AboutProxyObjectProject < EdgeCase::Koan def test_proxy_method_returns_wrapped_object # NOTE: The Television class is defined below tv = Proxy.new(Television.new) assert tv.instance_of?(Proxy) end def test_tv_methods_still_perform_their_function tv = Proxy.new(Television.new) tv.channel = 10 tv.power assert_equal 10, tv.channel assert tv.on? end def test_proxy_records_messages_sent_to_tv tv = Proxy.new(Television.new) tv.power tv.channel = 10 assert_equal [:power, :channel=], tv.messages end def test_proxy_handles_invalid_messages tv = Proxy.new(Television.new) assert_raise(NoMethodError) do tv.no_such_method end end def test_proxy_reports_methods_have_been_called tv = Proxy.new(Television.new) tv.power tv.power assert tv.called?(:power) assert ! tv.called?(:channel) end def test_proxy_counts_method_calls tv = Proxy.new(Television.new) tv.power tv.channel = 48 tv.power assert_equal 2, tv.number_of_times_called(:power) assert_equal 1, tv.number_of_times_called(:channel=) assert_equal 0, tv.number_of_times_called(:on?) end def test_proxy_can_record_more_than_just_tv_objects proxy = Proxy.new("Code Mash 2009") proxy.upcase! result = proxy.split assert_equal ["CODE", "MASH", "2009"], result assert_equal [:upcase!, :split], proxy.messages end end # ==================================================================== # The following code is to support the testing of the Proxy class. No # changes should be necessary to anything below this comment. # Example class using in the proxy testing above. class Television attr_accessor :channel def power if @power == :on @power = :off else @power = :on end end def on? @power == :on end end # Tests for the Television class. All of theses tests should pass. class TelevisionTest < EdgeCase::Koan def test_it_turns_on tv = Television.new tv.power assert tv.on? end def test_it_also_turns_off tv = Television.new tv.power tv.power assert ! tv.on? end def test_edge_case_on_off tv = Television.new tv.power tv.power tv.power assert tv.on? tv.power assert ! tv.on? end def test_can_set_the_channel tv = Television.new tv.channel = 11 assert_equal 11, tv.channel end end