akr	2014-12-20 17:58:30 +0900 (Sat, 20 Dec 2014)

  New Revision: 48906

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=48906

  Log:
    Add a test for Dir.mktmpdir(nil) [ruby-core:66943] [Bug #10616].

  Modified files:
    trunk/test/test_tmpdir.rb
Index: test/test_tmpdir.rb
===================================================================
--- test/test_tmpdir.rb	(revision 48905)
+++ test/test_tmpdir.rb	(revision 48906)
@@ -30,4 +30,10 @@ class TestTmpdir < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/test_tmpdir.rb#L30
     ENV["HOME"] = home
     Dir.rmdir(dir) if dir
   end
+
+  def test_mktmpdir_nil
+    Dir.mktmpdir(nil) {|d|
+      assert_kind_of(String, d)
+    }
+  end
 end

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