From ffa153f282b8fb94734a3b33ba83cc8566a0231f Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 28 Aug 2014 05:55:22 +0000
Subject: io.c: preserve encodings

* io.c (rb_io_extract_encoding_option): preserve encodings in
  warning messages.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47305 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_io_m17n.rb | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'test')

diff --git a/test/ruby/test_io_m17n.rb b/test/ruby/test_io_m17n.rb
index e9e6a1cf83..7f54762ebe 100644
--- a/test/ruby/test_io_m17n.rb
+++ b/test/ruby/test_io_m17n.rb
@@ -312,6 +312,17 @@ EOT
     }
   end
 
+  def test_ignored_encoding_option
+    enc = "\u{30a8 30f3 30b3 30fc 30c7 30a3 30f3 30b0}"
+    pattern = /#{enc}/
+    assert_warning(pattern) {
+      open(IO::NULL, external_encoding: "us-ascii", encoding: enc)
+    }
+    assert_warning(pattern) {
+      open(IO::NULL, internal_encoding: "us-ascii", encoding: enc)
+    }
+  end
+
   def test_io_new_enc
     with_tmpdir {
       generate_file("tmp", "\xa1")
-- 
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