test_require.rb: filesystem encoding

* test/ruby/test_require.rb (assert_require_nonascii_path): the
  path in error message is converted to filesystem encoding.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58997 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_require.rb

@@ -92,7 +92,6 @@ class TestRequire < Test::Unit::TestCase
       nil
     else
       proc do |require_path|
-        File.chmod(0777, File.dirname(require_path))
         $SAFE = 1
         require(require_path)
       end
@@ -123,8 +122,9 @@ class TestRequire < Test::Unit::TestCase
         $:.replace(load_path)
         $".replace(features)
         if SECURITY_WARNING
+          File.chmod(0777, File.dirname(require_path))
           require_path.untaint
-          ospath = require_path.encode(self.class.ospath_encoding(require_path))
+          ospath = require_path.encode('filesystem')
           assert_warn(/Insecure world writable dir/) do
             assert_raise_with_message(SecurityError, "loading from unsafe path #{ospath}") do
               SECURITY_WARNING.call(require_path)