Specify namedtuple_as_object=False when using simplejson

This makes namedtuple serialization consistent with non simplejson case.

Closes-Bug: #1356173
Change-Id: I9dd879914c7cb226c71e856914536318b416e488

oslo/serialization/jsonutils.py

@@ -38,11 +38,13 @@ import inspect
 import itertools
 import sys
 
+is_simplejson = False
 if sys.version_info < (2, 7):
     # On Python <= 2.6, json module is not C boosted, so try to use
     # simplejson module if available
     try:
         import simplejson as json
+        is_simplejson = True
     except ImportError:
         import json
 else:
@@ -165,10 +167,14 @@ def to_primitive(value, convert_instances=False, convert_datetime=True,
 
 
 def dumps(value, default=to_primitive, **kwargs):
+    if is_simplejson:
+        kwargs['namedtuple_as_object'] = False
     return json.dumps(value, default=default, **kwargs)
 
 
 def dump(obj, fp, *args, **kwargs):
+    if is_simplejson:
+        kwargs['namedtuple_as_object'] = False
     return json.dump(obj, fp, *args, **kwargs)
 
 

tests/test_jsonutils.py

@@ -13,6 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+import collections
 import datetime
 import json
 
@@ -33,8 +34,9 @@ class JSONUtilsTestMixin(object):
 
     def setUp(self):
         super(JSONUtilsTestMixin, self).setUp()
-        self.json_patcher = mock.patch.object(
-            jsonutils, 'json', self.json_impl)
+        self.json_patcher = mock.patch.multiple(
+            jsonutils, json=self.json_impl,
+            is_simplejson=self.json_impl is simplejson)
         self.json_impl_mock = self.json_patcher.start()
 
     def tearDown(self):
@@ -44,6 +46,10 @@ class JSONUtilsTestMixin(object):
     def test_dumps(self):
         self.assertEqual('{"a": "b"}', jsonutils.dumps({'a': 'b'}))
 
+    def test_dumps_namedtuple(self):
+        n = collections.namedtuple("foo", "bar baz")(1, 2)
+        self.assertEqual('[1, 2]', jsonutils.dumps(n))
+
     def test_dump(self):
         expected = '{"a": "b"}'
         json_dict = {'a': 'b'}
@@ -53,6 +59,15 @@ class JSONUtilsTestMixin(object):
 
         self.assertEqual(expected, fp.getvalue())
 
+    def test_dump_namedtuple(self):
+        expected = '[1, 2]'
+        json_dict = collections.namedtuple("foo", "bar baz")(1, 2)
+
+        fp = six.StringIO()
+        jsonutils.dump(json_dict, fp)
+
+        self.assertEqual(expected, fp.getvalue())
+
     def test_loads(self):
         self.assertEqual({'a': 'b'}, jsonutils.loads('{"a": "b"}'))