fix test for OrderedDict

tests/test_fields.py

@@ -3,6 +3,7 @@ General serializer field tests.
 """
 from __future__ import unicode_literals
 
+from collections import OrderedDict
 import datetime
 import re
 from decimal import Decimal
@@ -10,7 +11,6 @@ from uuid import uuid4
 from django.core import validators
 from django.db import models
 from django.test import TestCase
-from django.utils.datastructures import SortedDict
 from rest_framework import serializers
 from tests.models import RESTFrameworkModel
 
@@ -95,7 +95,7 @@ class BasicFieldTests(TestCase):
         Field should preserve dictionary ordering, if it exists.
         See: https://github.com/tomchristie/django-rest-framework/issues/832
         """
-        ret = SortedDict()
+        ret = OrderedDict()
         ret['c'] = 1
         ret['b'] = 1
         ret['a'] = 1

tests/test_serializer.py

@@ -1297,7 +1297,7 @@ class SerializerPickleTests(TestCase):
 
     def test_pickle_inner_serializer(self):
         """
-        Test pickling a serializer whose resulting .data (a SortedDictWithMetadata) will
+        Test pickling a serializer whose resulting .data (a OrderedDictWithMetadata) will
         have unpickleable meta data--in order to make sure metadata doesn't get pulled into the pickle.
         See DictWithMetadata.__getstate__
         """
@@ -1312,13 +1312,13 @@ class SerializerPickleTests(TestCase):
         Regression test for #645.
         """
         data = serializers.DictWithMetadata({1: 1})
-        self.assertEqual(data.__getstate__(), serializers.SortedDict({1: 1}))
+        self.assertEqual(data.__getstate__(), serializers.OrderedDict({1: 1}))
 
     def test_serializer_data_is_pickleable(self):
         """
         Another regression test for #645.
         """
-        data = serializers.SortedDictWithMetadata({1: 1})
+        data = serializers.OrderedDictWithMetadata({1: 1})
         repr(pickle.loads(pickle.dumps(data, 0)))