require_relative 'helper' module Psych class Tagged yaml_tag '!foo' attr_accessor :baz def initialize @baz = 'bar' 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 assert_match('foo', Psych.dump(tag)) end def test_tag_round_trip tag = Tagged.new tag2 = Psych.load(Psych.dump(tag)) 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