* ext/psych/lib/psych/visitors/to_ruby.rb: Hash subclasses can be read

  from YAML files.
* ext/psych/lib/psych/visitors/yaml_tree.rb: Hash subclasses can be
  dumped to YAML files.
* test/psych/test_hash.rb: corresponding test.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31961 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 14 insertions, 0 deletions

diff --git a/test/psych/test_hash.rb b/test/psych/test_hash.rb
index 3147076792..4bd4edfc8c 100644
--- a/test/psych/test_hash.rb
+++ b/test/psych/test_hash.rb
@@ -2,11 +2,25 @@ require 'psych/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)