akr	2015-11-10 00:57:07 +0900 (Tue, 10 Nov 2015)

  New Revision: 52509

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=52509

  Log:
    add a test.

  Modified files:
    trunk/test/ruby/test_refinement.rb
Index: test/ruby/test_refinement.rb
===================================================================
--- test/ruby/test_refinement.rb	(revision 52508)
+++ test/ruby/test_refinement.rb	(revision 52509)
@@ -1494,6 +1494,35 @@ class TestRefinement < Test::Unit::TestC https://github.com/ruby/ruby/blob/trunk/test/ruby/test_refinement.rb#L1494
     INPUT
   end
 
+  def test_reopen_refinement_module
+    assert_separately([], <<-"end;")
+      $VERBOSE = nil
+      class C
+      end
+
+      module R
+        refine C do
+          def m
+            :foo
+          end
+        end
+      end
+
+      using R
+      assert_equal(:foo, C.new.m)
+
+      module R
+        refine C do
+          def m
+            :bar
+          end
+        end
+      end
+
+      assert_equal(:bar, C.new.m)
+    end;
+  end
+
   private
 
   def eval_using(mod, s)

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