fixing cyclic object reference handling. Thanks to @CvX for the test. fixes #19

1 files changed, 17 insertions, 0 deletions

diff --git a/test/psych/test_object.rb b/test/psych/test_object.rb
index 9890d50..6145bb6 100644
--- a/test/psych/test_object.rb
+++ b/test/psych/test_object.rb
@@ -11,6 +11,14 @@ module Psych
     end
   end
 
+  class Foo
+    attr_accessor :parent
+
+    def initialize parent
+      @parent = parent
+    end
+  end
+
   class TestObject < TestCase
     def test_dump_with_tag
       tag = Tagged.new
@@ -23,5 +31,14 @@ module Psych
       assert_equal tag.baz, tag2.baz
       assert_instance_of(Tagged, tag2)
     end
+
+    def test_cyclic_references
+      foo = Foo.new(nil)
+      foo.parent = foo
+      loaded = Psych.load Psych.dump foo
+
+      assert_instance_of(Foo, loaded)
+      assert_equal loaded, loaded.parent
+    end
   end
 end