add test for [ruby-dev:24460]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@7019 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

MANIFEST

@@ -916,6 +916,7 @@ test/ruby/test_float.rb
 test/ruby/test_gc.rb
 test/ruby/test_hash.rb
 test/ruby/test_ifunless.rb
+test/ruby/test_io.rb
 test/ruby/test_iterator.rb
 test/ruby/test_marshal.rb
 test/ruby/test_math.rb

test/ruby/test_io.rb

@@ -0,0 +1,11 @@
+require 'test/unit'
+
+class TestIO < Test::Unit::TestCase
+  def test_gets_rs
+    r, w = IO.pipe
+    w.print "\377xyz"
+    w.close
+    assert_equal("\377", r.gets("\377"), "[ruby-dev:24460]")
+    r.close
+  end
+end