Fix build

lib/cucumber/events/bus.rb

@@ -38,16 +38,49 @@ def parse_event_id(event_id)
         when Class
           return event_id
         when String
-          return Object.const_get(event_id)
+          constantize(event_id)
         else
-          Object.const_get("#{@default_namespace}::#{camel_case(event_id)}")
+          constantize("#{@default_namespace}::#{camel_case(event_id)}")
         end
       end
 
       def camel_case(underscored_name)
         underscored_name.to_s.split("_").map { |word| word.upcase[0] + word[1..-1] }.join
       end
 
+      # Thanks ActiveSupport
+      # (Only needed to support Ruby 1.9.3 and JRuby)
+      def constantize(camel_cased_word)
+        names = camel_cased_word.split('::')
+
+        # Trigger a built-in NameError exception including the ill-formed constant in the message.
+        Object.const_get(camel_cased_word) if names.empty?
+
+        # Remove the first blank element in case of '::ClassName' notation.
+        names.shift if names.size > 1 && names.first.empty?
+
+        names.inject(Object) do |constant, name|
+          if constant == Object
+            constant.const_get(name)
+          else
+            candidate = constant.const_get(name)
+            next candidate if constant.const_defined?(name, false)
+            next candidate unless Object.const_defined?(name)
+
+            # Go down the ancestors to check if it is owned directly. The check
+            # stops when we reach Object or the end of ancestors tree.
+            constant = constant.ancestors.inject do |const, ancestor|
+              break const    if ancestor == Object
+              break ancestor if ancestor.const_defined?(name, false)
+              const
+            end
+
+            # owner is in Object, so raise
+            constant.const_get(name, false)
+          end
+        end
+      end
+
     end
   end
 end

spec/cucumber/events/bus_spec.rb

@@ -2,13 +2,13 @@
 
 module Cucumber
   module Events
-    describe Bus do
-      class TestEvent
-      end
+    class TestEvent
+    end
 
-      class AnotherTestEvent
-      end
+    class AnotherTestEvent
+    end
 
+    describe Bus do
       let(:bus) { Bus.new(Cucumber::Events) }
       let(:test_event) { TestEvent.new }
       let(:another_test_event) { AnotherTestEvent.new }