* ext/psych/*: importing Psych to trunk

* test/psych/*: ditto
* lib/psych/*: ditto

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27079 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/psych/test_array.rb

@@ -0,0 +1,19 @@
+require 'test/psych/helper'
+
+module Psych
+  class TestArray < TestCase
+    def setup
+      super
+      @list = [{ :a => 'b' }, 'foo']
+    end
+
+    def test_self_referential
+      @list << @list
+      assert_cycle(@list)
+    end
+
+    def test_cycle
+      assert_cycle(@list)
+    end
+  end
+end