From 4834aa5307d8c4750b7598b6b2ef8728d01d98b4 Mon Sep 17 00:00:00 2001
From: naruse <naruse@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 8 May 2013 08:47:26 +0000
Subject: * io.c (rb_io_ext_int_to_encs): ignore internal encoding if external 
  encoding is ASCII-8BIT. [Bug #8342]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40610 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_io_m17n.rb | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

(limited to 'test')

diff --git a/test/ruby/test_io_m17n.rb b/test/ruby/test_io_m17n.rb
index ec2086186c..ac3b8eaa1e 100644
--- a/test/ruby/test_io_m17n.rb
+++ b/test/ruby/test_io_m17n.rb
@@ -105,6 +105,42 @@ EOT
     }
   end
 
+  def test_open_r_ascii8bit
+    with_tmpdir {
+      generate_file('tmp', "")
+      EnvUtil.with_default_external(Encoding::ASCII_8BIT) do
+        EnvUtil.with_default_internal(Encoding::UTF_8) do
+          open("tmp", "r") {|f|
+            assert_equal(Encoding::ASCII_8BIT, f.external_encoding)
+            assert_equal(nil, f.internal_encoding)
+          }
+          open("tmp", "r:ascii-8bit") {|f|
+            assert_equal(Encoding::ASCII_8BIT, f.external_encoding)
+            assert_equal(nil, f.internal_encoding)
+          }
+          open("tmp", "r:ascii-8bit:utf-16") {|f|
+            assert_equal(Encoding::ASCII_8BIT, f.external_encoding)
+            assert_equal(nil, f.internal_encoding)
+          }
+        end
+        EnvUtil.with_default_internal(nil) do
+          open("tmp", "r") {|f|
+            assert_equal(Encoding::ASCII_8BIT, f.external_encoding)
+            assert_equal(nil, f.internal_encoding)
+          }
+          open("tmp", "r:ascii-8bit") {|f|
+            assert_equal(Encoding::ASCII_8BIT, f.external_encoding)
+            assert_equal(nil, f.internal_encoding)
+          }
+          open("tmp", "r:ascii-8bit:utf-16") {|f|
+            assert_equal(Encoding::ASCII_8BIT, f.external_encoding)
+            assert_equal(nil, f.internal_encoding)
+          }
+        end
+      end
+    }
+  end
+
   def test_open_r_enc_in_opt
     with_tmpdir {
       generate_file('tmp', "")
-- 
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