From b81ea661dbc3c31073de782a8b0b9f3f86e3de5e Mon Sep 17 00:00:00 2001
From: akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 3 Apr 2013 12:25:09 +0000
Subject: * io.c (rb_io_seek_m): Accept :CUR, :END, :SET as "whence" argument. 
  (interpret_seek_whence): New function.   [ruby-dev:45818] [Feature #6643]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40084 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_io.rb | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'test')

diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index 8ccb5de03b..b968bb6fcd 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -1514,6 +1514,26 @@ class TestIO < Test::Unit::TestCase
     }
   end
 
+  def test_seek_symwhence
+    make_tempfile {|t|
+      open(t.path) { |f|
+        f.seek(9, :SET)
+        assert_equal("az\n", f.read)
+      }
+
+      open(t.path) { |f|
+        f.seek(-4, :END)
+        assert_equal("baz\n", f.read)
+      }
+
+      open(t.path) { |f|
+        assert_equal("foo\n", f.gets)
+        f.seek(2, :CUR)
+        assert_equal("r\nbaz\n", f.read)
+      }
+    }
+  end
+
   def test_sysseek
     make_tempfile {|t|
       open(t.path) do |f|
-- 
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