Fixed to do force_encoding when decoding JSON.

Author: masato-hi

lib/spring/json.rb

@@ -13,7 +13,7 @@
 module Spring
   module JSON
     def self.load(string)
-      OkJson.decode(string)
+      OkJson.decode(string.dup.force_encoding("utf-8"))
     end
 
     def self.dump(data)

test/unit/json_test.rb

@@ -8,5 +8,11 @@ class JsonTest < ActiveSupport::TestCase
 
   test 'can encode' do
     assert_equal('{}', Spring::JSON.dump({}))
-  end 
+  end
+
+  test 'can encode and decode unicode characters' do
+    encoded = Spring::JSON.dump({"unicode_example"=>"©".b})
+    assert_equal('{"unicode_example":"©"}'.b, encoded)
+    assert_equal({"unicode_example"=>"©"}, Spring::JSON.load(encoded))
+  end
 end