require_relative 'helper' module Psych class TestHash < TestCase class X < Hash end def setup super @hash = { :a => 'b' } end def test_empty_subclass assert_match "!ruby/hash:#{X}", Psych.dump(X.new) x = Psych.load Psych.dump X.new assert_equal X, x.class end def test_map x = Psych.load "--- !map:#{X} { }\n" assert_equal X, x.class end def test_self_referential @hash['self'] = @hash assert_cycle(@hash) end def test_cycles assert_cycle(@hash) end def test_ref_append hash = Psych.load(<<-eoyml) --- foo: &foo hello: world bar: <<: *foo eoyml assert_equal({"foo"=>{"hello"=>"world"}, "bar"=>{"hello"=>"world"}}, hash) end end end