In AV::TC, move protect_against_forgery? from the test_case to the

_helper module included in the view.

- ensures that protect_against_forgery? is present when a helper
  included in a partial that is rendered by the template under test
  calls it (which happens in FormTagHelper#extra_tags_for_form, for
  example).

[#4700 state:resolved]

Signed-off-by: José Valim <jose.valim@gmail.com>

actionpack/lib/action_view/test_case.rb

@@ -89,16 +89,13 @@ module ActionView
 
         self.class.send(:include_helper_modules!)
         make_test_case_available_to_view!
+        say_no_to_protect_against_forgery!
       end
 
       def config
         @controller.config if @controller.respond_to?(:config)
       end
 
-      def protect_against_forgery?
-        false
-      end
-
       def render(options = {}, local_assigns = {}, &block)
         @rendered << output = _view.render(options, local_assigns, &block)
         output
@@ -117,6 +114,14 @@ module ActionView
         HTML::Document.new(@rendered.blank? ? @output_buffer : @rendered).root
       end
 
+      def say_no_to_protect_against_forgery!
+        _helpers.module_eval do
+          def protect_against_forgery?
+            false
+          end
+        end
+      end
+
       def make_test_case_available_to_view!
         test_case_instance = self
         _helpers.module_eval do

actionpack/test/template/test_case_test.rb

@@ -122,6 +122,21 @@ module ActionView
     helper_method :from_test_case
   end
 
+  class IgnoreProtectAgainstForgeryTest < ActionView::TestCase
+    module HelperThatInvokesProtectAgainstForgery
+      def help_me
+        protect_against_forgery?
+      end
+    end
+
+    helper HelperThatInvokesProtectAgainstForgery
+
+    test "protect_from_forgery? in any helpers returns false" do
+      assert !_view.help_me
+    end
+
+  end
+
   class ATestHelperTest < ActionView::TestCase
     include SharedTests
     test_case = self