Add Module#remove_possible_singleton_method

This is primarily to fix method redefinition warnings in class_attribute
but may be of use in other places where we define singleton methods.

1 files changed, 15 insertions, 3 deletions

diff --git a/activesupport/test/core_ext/module/remove_method_test.rb b/activesupport/test/core_ext/module/remove_method_test.rb
index 4657f0c175..77774afb0d 100644
--- a/activesupport/test/core_ext/module/remove_method_test.rb
+++ b/activesupport/test/core_ext/module/remove_method_test.rb
@@ -6,19 +6,31 @@ module RemoveMethodTests
     def do_something
       return 1
     end
-    
+
+    class << self
+      def do_something_else
+        return 2
+      end
+    end
   end
 end
 
 class RemoveMethodTest < ActiveSupport::TestCase
-  
+
   def test_remove_method_from_an_object
     RemoveMethodTests::A.class_eval{
       self.remove_possible_method(:do_something)
     }
     assert !RemoveMethodTests::A.new.respond_to?(:do_something)
   end
-  
+
+  def test_remove_singleton_method_from_an_object
+    RemoveMethodTests::A.class_eval{
+      self.remove_possible_singleton_method(:do_something_else)
+    }
+    assert !RemoveMethodTests::A.respond_to?(:do_something_else)
+  end
+
   def test_redefine_method_in_an_object
     RemoveMethodTests::A.class_eval{
       self.redefine_method(:do_something) { return 100 }