Merge pull request rails#6777 from route/logger_in_metal_tests

Added test for case when view doesn't have logger method when using 
ActionController::Metal controller.

Author: carlosantoniodasilva

actionpack/test/controller/render_test.rb

@@ -730,6 +730,14 @@ def determine_layout
     end
 end
 
+class MetalTestController < ActionController::Metal
+  include ActionController::Rendering
+
+  def accessing_logger_in_template
+    render :inline =>  "<%= logger.class %>"
+  end
+end
+
 class RenderTest < ActionController::TestCase
   tests TestController
 
@@ -1617,3 +1625,12 @@ def test_last_modified_works_with_less_than_too
     assert_response :success
   end
 end
+
+class MetalRenderTest < ActionController::TestCase
+  tests MetalTestController
+
+  def test_access_to_logger_in_view
+    get :accessing_logger_in_template
+    assert_equal "NilClass", @response.body
+  end
+end