From d54f7b05e8b2e516451fb50c816cec311db570bf Mon Sep 17 00:00:00 2001
From: ocean <ocean@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 16 Jan 2006 01:29:58 +0000
Subject: * ext/syck/emitter.c (syck_emit_seq, syck_emit_map, syck_emit_item): 
  should output complex key mark even if map's key is empty seq/map.  
 [ruby-core:7129]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@9835 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/yaml/test_yaml.rb | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'test')

diff --git a/test/yaml/test_yaml.rb b/test/yaml/test_yaml.rb
index 78a0877300..676310e6fc 100644
--- a/test/yaml/test_yaml.rb
+++ b/test/yaml/test_yaml.rb
@@ -1253,6 +1253,25 @@ EOY
       assert_cycle(NumericTest.new(3)) # Subclass of Numeric
     end
 
+    #
+    # Test empty map/seq in map cycle
+    #
+    def test_empty_map_key
+      #
+      # empty seq as key
+      #
+      o = YAML.load({[]=>""}.to_yaml)
+      assert_equal(Hash, o.class)
+      assert_equal([[]], o.keys)
+
+      #
+      # empty map as key
+      #
+      o = YAML.load({{}=>""}.to_yaml)
+      assert_equal(Hash, o.class)
+      assert_equal([{}], o.keys)
+    end
+
 end
 
 if $0 == __FILE__
-- 
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