From 5b52d585f492bf9929738c27241c028aefebbf2c Mon Sep 17 00:00:00 2001
From: nagachika <nagachika@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sat, 5 Nov 2016 02:52:31 +0000
Subject: merge revision(s) 53533: [Backport #12895]

	* sprintf.c (rb_str_format): format exact number more exactly.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@56567 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_sprintf.rb | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'test/ruby')

diff --git a/test/ruby/test_sprintf.rb b/test/ruby/test_sprintf.rb
index 66ae4db853..8aa0cbfea5 100644
--- a/test/ruby/test_sprintf.rb
+++ b/test/ruby/test_sprintf.rb
@@ -149,6 +149,11 @@ class TestSprintf < Test::Unit::TestCase
     assert_equal(" Inf", sprintf("% e", inf), '[ruby-dev:34002]')
   end
 
+  def test_bignum
+    assert_match(/\A10{120}\.0+\z/, sprintf("%f", 100**60))
+    assert_match(/\A10{180}\.0+\z/, sprintf("%f", 1000**60))
+  end
+
   def test_rational
     assert_match(/\A0\.10+\z/, sprintf("%.60f", 0.1r))
     assert_match(/\A0\.010+\z/, sprintf("%.60f", 0.01r))
-- 
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