add a test.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@14979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 0 deletions

diff --git a/test/ruby/test_m17n.rb b/test/ruby/test_m17n.rb
index 32415683b6..288b084cdf 100644
--- a/test/ruby/test_m17n.rb
+++ b/test/ruby/test_m17n.rb
@@ -248,6 +248,10 @@ class TestM17N < Test::Unit::TestCase
     }
   end
 
+  def test_utf16_valid_encoding
+    assert_equal(false, "\xd8\x00\xd8\x00".force_encoding("utf-16be").valid_encoding?)
+  end
+
   def test_regexp_too_short_multibyte_character
     assert_raise(SyntaxError) { eval('/\xfe/e') }
     assert_raise(SyntaxError) { eval('/\x8e/e') }