Fixed double output from cache in no caching mode

actionpack/lib/action_view/helpers/cache_helper.rb

@@ -32,27 +32,27 @@ module ActionView
       #      <i>Topics listed alphabetically</i>
       #    <% end %>
       def cache(name = {}, options = nil, &block)
-        safe_concat fragment_for(name, options, &block)
+        if controller.perform_caching
+          safe_concat(fragment_for(name, options, &block))
+        else
+          yield
+        end
+
         nil
       end
 
     private
       # TODO: Create an object that has caching read/write on it
       def fragment_for(name = {}, options = nil, &block) #:nodoc:
-        if controller.perform_caching
-          if controller.fragment_exist?(name, options)
-            controller.read_fragment(name, options)
-          else
-            # VIEW TODO: Make #capture usable outside of ERB
-            # This dance is needed because Builder can't use capture
-            pos = output_buffer.length
-            yield
-            fragment = output_buffer.slice!(pos..-1)
-            controller.write_fragment(name, fragment, options)
-          end
+        if controller.fragment_exist?(name, options)
+          controller.read_fragment(name, options)
         else
-          ret = yield
-          ActiveSupport::SafeBuffer.new(ret) if ret.is_a?(String)
+          # VIEW TODO: Make #capture usable outside of ERB
+          # This dance is needed because Builder can't use capture
+          pos = output_buffer.length
+          yield
+          fragment = output_buffer.slice!(pos..-1)
+          controller.write_fragment(name, fragment, options)
         end
       end
     end

actionpack/test/controller/caching_test.rb

@@ -644,21 +644,6 @@ class FragmentCachingTest < ActionController::TestCase
     assert_equal 'will not expire ;-)', @store.read('views/primalgrasp')
   end
 
-  def test_fragment_for_with_disabled_caching
-    @controller.perform_caching = false
-
-    @store.write('views/expensive', 'fragment content')
-    fragment_computed = false
-
-    view_context = @controller.view_context
-
-    buffer = 'generated till now -> '.html_safe
-    buffer << view_context.send(:fragment_for, 'expensive') { fragment_computed = true }
-
-    assert fragment_computed
-    assert_equal 'generated till now -> ', buffer
-  end
-
   def test_fragment_for
     @store.write('views/expensive', 'fragment content')
     fragment_computed = false