Ensure namespaced helpers are included automatically

-- Closes rspec#446.

Changelog.md

@@ -4,6 +4,7 @@
 
 * Enhancements
     * Eliminate deprecation warnings in generated view specs in Rails 3.2
+    * Ensure namespaced helpers are included automatically (Evgeniy Dolzhenko)
 
 ### 2.8.0.rc2 / 2011-12-19
 

lib/rspec/rails/example/view_example_group.rb

@@ -10,7 +10,7 @@ module ViewExampleGroup
 
     module ClassMethods
       def _default_helper
-        base = metadata[:example_group][:description].split('/').first
+        base = metadata[:example_group][:description].split('/')[0..-2].join('/')
         (base.camelize + 'Helper').constantize if base
       rescue NameError
         nil

spec/rspec/rails/example/view_example_group_spec.rb

@@ -14,6 +14,7 @@ module RSpec::Rails
 
     describe 'automatic inclusion of helpers' do
       module ::ThingsHelper; end
+      module ::Namespaced; module ThingsHelper; end; end
 
       it 'includes the helper with the same name' do
         group = RSpec::Core::ExampleGroup.describe 'things/show.html.erb'
@@ -23,6 +24,14 @@ module ::ThingsHelper; end
         end
       end
 
+      it 'includes the namespaced helper with the same name' do
+        group = RSpec::Core::ExampleGroup.describe 'namespaced/things/show.html.erb'
+        group.should_receive(:helper).with(Namespaced::ThingsHelper)
+        group.class_eval do
+          include ViewExampleGroup
+        end
+      end
+
       it 'operates normally when no helper with the same name exists' do
         raise 'unexpected constant found' if Object.const_defined?('ClocksHelper')
         lambda {