find quit words with word bounds

Author: tansengming

lib/eliza/sentence.rb

@@ -7,7 +7,7 @@ def initialize(text)
     end
 
     def quit?
-      data.quit_words.find{|quit_word| text.include? quit_word }
+      data.quit_words.find{|quit_word| text[/\b#{quit_word}\b/] }
     end
 
     def transform

spec/eliza/sentence_spec.rb

@@ -65,5 +65,10 @@
       let(:text) { 'Bye! its been good talking to you.' }
       it { should match /Goodbye/ }
     end
+
+    context 'when the quit word is part of another word' do
+      let(:text) { 'I liked rockabye baby' }
+      it { should_not match /Goodbye/ }
+    end
   end  
 end