1 files changed, 49 insertions, 0 deletions
diff --git a/jni/ruby/test/psych/test_hash.rb b/jni/ruby/test/psych/test_hash.rb
new file mode 100644
index 0000000..264a471
--- /dev/null
+++ b/jni/ruby/test/psych/test_hash.rb
@@ -0,0 +1,49 @@
+require_relative 'helper'
+
+module Psych
+  class TestHash < TestCase
+    class X < Hash
+    end
+
+    def setup
+      super
+      @hash = { :a => 'b' }
+    end
+
+    def test_load_with_class_syck_compatibility
+      hash = Psych.load "--- !ruby/object:Hash\n:user_id: 7\n:username: Lucas\n"
+      assert_equal({ user_id: 7, username: 'Lucas'}, hash)
+    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