From fc5a26c2d41fade0771217e5b8ba257249db5251 Mon Sep 17 00:00:00 2001
From: akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 7 Jan 2008 22:57:00 +0000
Subject: * string.c (rb_str_buf_append): fix append itself.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@14941 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_string.rb | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'test/ruby')

diff --git a/test/ruby/test_string.rb b/test/ruby/test_string.rb
index 524ab47051..647c520707 100644
--- a/test/ruby/test_string.rb
+++ b/test/ruby/test_string.rb
@@ -170,6 +170,12 @@ class TestString < Test::Unit::TestCase
   def test_LSHIFT # '<<'
     assert_equal(S("world!"), S("world") << 33)
     assert_equal(S("world!"), S("world") << S('!'))
+
+    s = "a"
+    10.times {|i|
+      s << s
+      assert_equal("a" * (2<<i), s)
+    }
   end
 
   def test_MATCH # '=~'
-- 
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