From a73c16b85f79aeb9139734a64623b49bc169fce9 Mon Sep 17 00:00:00 2001
From: Tom Christie
Date: Sat, 18 May 2013 11:27:48 +0100
Subject: serializers.Field respects ordering on dicts if it exists.  Closes
 #832

---
 rest_framework/tests/fields.py | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

(limited to 'rest_framework/tests/fields.py')

diff --git a/rest_framework/tests/fields.py b/rest_framework/tests/fields.py
index 3cdfa0f6..5b5ce835 100644
--- a/rest_framework/tests/fields.py
+++ b/rest_framework/tests/fields.py
@@ -2,13 +2,12 @@
 General serializer field tests.
 """
 from __future__ import unicode_literals
+from django.utils.datastructures import SortedDict
 import datetime
 from decimal import Decimal
-
 from django.db import models
 from django.test import TestCase
 from django.core import validators
-
 from rest_framework import serializers
 from rest_framework.serializers import Serializer
 
@@ -63,6 +62,20 @@ class BasicFieldTests(TestCase):
         serializer = CharPrimaryKeyModelSerializer()
         self.assertEqual(serializer.fields['id'].read_only, False)
 
+    def test_dict_field_ordering(self):
+        """
+        Field should preserve dictionary ordering, if it exists.
+        See: https://github.com/tomchristie/django-rest-framework/issues/832
+        """
+        ret = SortedDict()
+        ret['c'] = 1
+        ret['b'] = 1
+        ret['a'] = 1
+        ret['z'] = 1
+        field = serializers.Field()
+        keys = list(field.to_native(ret).keys())
+        self.assertEqual(keys, ['c', 'b', 'a', 'z'])
+
 
 class DateFieldTest(TestCase):
     """
@@ -645,4 +658,4 @@ class DecimalFieldTest(TestCase):
         s = DecimalSerializer(data={'decimal_field': '12345.6'})
 
         self.assertFalse(s.is_valid())
-        self.assertEqual(s.errors,  {'decimal_field': ['Ensure that there are no more than 4 digits in total.']})
\ No newline at end of file
+        self.assertEqual(s.errors,  {'decimal_field': ['Ensure that there are no more than 4 digits in total.']})
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