registry.Json: Fix broken test due to returning the internal state directly

Author: progval

src/registry.py

@@ -31,6 +31,7 @@
 
 import re
 import os
+import copy
 import time
 import json
 import codecs
@@ -921,6 +922,8 @@ def hasTemplate(s):
 class Json(String):
     __slots__ = ()
 
+    def __call__(self):
+        return copy.deepcopy(super(Json, self).__call__())
     def set(self, v):
         self.setValue(json.loads(v))
     def __str__(self):

test/test_registry.py

@@ -140,13 +140,13 @@ def testJson(self):
         self.assertIsNot(v(), data)
 
         with v.editable() as dict_:
-            dict_['supy'] = 'bot'
+            dict_['supy'] = ['bot']
             del dict_['qux']
             self.assertNotIn('supy', v())
             self.assertIn('qux', v())
         self.assertIn('supy', v())
-        self.assertEqual(v()['supy'], 'bot')
-        self.assertIsNot(v()['supy'], 'bot')
+        self.assertEqual(v()['supy'], ['bot'])
+        self.assertIsNot(v()['supy'], ['bot'])
         self.assertNotIn('qux', v())
 
     def testNormalizedString(self):