* ext/psych/lib/psych/visitors/to_ruby.rb: BigDecimals can be restored

  from YAML.
* ext/psych/lib/psych/visitors/yaml_tree.rb: BigDecimals can be dumped
  to YAML.
* test/psych/test_numeric.rb: tests for BigDecimal serialization

Fixes #31

1 files changed, 11 insertions, 0 deletions

diff --git a/test/psych/test_numeric.rb b/test/psych/test_numeric.rb
index 9adb058..bae723a 100644
--- a/test/psych/test_numeric.rb
+++ b/test/psych/test_numeric.rb
@@ -1,4 +1,5 @@
 require 'psych/helper'
+require 'bigdecimal'
 
 module Psych
   ###
@@ -10,5 +11,15 @@ module Psych
       str = Psych.load('--- 090')
       assert_equal '090', str
     end
+
+    def test_big_decimal_tag
+      decimal = BigDecimal("12.34")
+      assert_match "!ruby/object:BigDecimal", Psych.dump(decimal)
+    end
+
+    def test_big_decimal_round_trip
+      decimal = BigDecimal("12.34")
+      assert_cycle decimal
+    end
   end
 end