backport Tempfile.create so psych tests will run outside ruby trunk

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42719 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/psych/helper.rb

@@ -83,3 +83,32 @@ module Psych
     end
   end
 end
+
+# backport so that tests will run on 1.9 and 2.0.0
+unless Tempfile.respond_to? :create
+  def Tempfile.create(basename, *rest)
+    tmpfile = nil
+    Dir::Tmpname.create(basename, *rest) do |tmpname, n, opts|
+      mode = File::RDWR|File::CREAT|File::EXCL
+      perm = 0600
+      if opts
+        mode |= opts.delete(:mode) || 0
+        opts[:perm] = perm
+        perm = nil
+      else
+        opts = perm
+      end
+      tmpfile = File.open(tmpname, mode, opts)
+    end
+    if block_given?
+      begin
+        yield tmpfile
+      ensure
+        tmpfile.close if !tmpfile.closed?
+        File.unlink tmpfile
+      end
+    else
+      tmpfile
+    end
+  end
+end