naruse	2012-01-24 13:00:44 +0900 (Tue, 24 Jan 2012)

  New Revision: 34366

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=34366

  Log:
    Additional test for r34358.

  Modified files:
    trunk/test/ruby/test_io_m17n.rb

Index: test/ruby/test_io_m17n.rb
===================================================================
--- test/ruby/test_io_m17n.rb	(revision 34365)
+++ test/ruby/test_io_m17n.rb	(revision 34366)
@@ -1044,6 +1044,7 @@
     }
     assert_nothing_raised {
       open(__FILE__, "r", binmode: true) {|f|
+        assert_equal(Encoding::ASCII_8BIT, f.external_encoding)
         f.set_encoding("iso-2022-jp")
       }
     }

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