nobu	2013-10-02 16:48:19 +0900 (Wed, 02 Oct 2013)

  New Revision: 43118

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=43118

  Log:
    test_io.rb: add test
    
    * test/ruby/test_io.rb (tesst_pid_after_close_read): test for r43117.

  Modified files:
    trunk/test/ruby/test_io.rb
Index: test/ruby/test_io.rb
===================================================================
--- test/ruby/test_io.rb	(revision 43117)
+++ test/ruby/test_io.rb	(revision 43118)
@@ -1409,6 +1409,17 @@ class TestIO < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_io.rb#L1409
     assert_raise(IOError) { pipe.pid }
   end
 
+  def tesst_pid_after_close_read
+    pid1 = pid2 = nil
+    IO.popen(["echo", ""], "r+") do |io|
+      pid1 = io.pid
+      io.close_read
+      pid2 = io.pid
+    end
+    assert_not_nil(pid1)
+    assert_equal(pid1, pid2)
+  end
+
   def make_tempfile
     t = Tempfile.new("test_io")
     t.binmode

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