* test/ruby/test_{class,module}.rb (test_method_redefinition): refined.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@25150 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/envutil.rb

@@ -65,6 +65,19 @@ module EnvUtil
     stderr.close unless !stderr || stderr.closed?
   end
   module_function :rubyexec
+
+
+  def verbose_warning
+    class << (stderr = "")
+      alias write <<
+    end
+    stderr, $stderr, verbose, $VERBOSE = $stderr, stderr, $VERBOSE, true
+    yield stderr
+  ensure
+    stderr, $stderr, $VERBOSE = $stderr, stderr, verbose
+    return stderr
+  end
+  module_function :verbose_warning
 end
 
 module Test