add a test.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@18881 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 8 insertions, 0 deletions

diff --git a/test/ruby/test_io_m17n.rb b/test/ruby/test_io_m17n.rb
index 2caa2cb2b8..90dd831dd5 100644
--- a/test/ruby/test_io_m17n.rb
+++ b/test/ruby/test_io_m17n.rb
@@ -826,6 +826,14 @@ EOT
     }
   end
 
+  def test_read_stateful
+    with_pipe("euc-jp:iso-2022-jp") {|r, w|
+      w << "\xA4\xA2"
+      w.close
+      assert_equal("\e$B$\"\e(B".force_encoding("iso-2022-jp"), r.read)
+    }
+  end
+
   def test_stdin_external_encoding_with_reopen
     with_tmpdir {
       open("tst", "w+") {|f|