[1.8.x] Added a test for UUIDField serialization; refs #24320.

Backport of d7509c5246 from master

tests/serializers_regress/models.py

@@ -280,6 +280,10 @@ class SmallPKData(models.Model):
 #    data = models.TimeField(primary_key=True)
 
 
+class UUIDData(models.Model):
+    data = models.UUIDField(primary_key=True)
+
+
 class ComplexModel(models.Model):
     field1 = models.CharField(max_length=10)
     field2 = models.CharField(max_length=10)

tests/serializers_regress/tests.py

@@ -10,6 +10,7 @@ from __future__ import unicode_literals
 
 import datetime
 import decimal
+import uuid
 from unittest import skipUnless
 
 from django.core import serializers
@@ -36,7 +37,7 @@ from .models import (
     NullBooleanData, O2OData, PositiveIntegerData, PositiveIntegerPKData,
     PositiveSmallIntegerData, PositiveSmallIntegerPKData, ProxyBaseModel,
     ProxyProxyBaseModel, SlugData, SlugPKData, SmallData, SmallPKData, Tag,
-    TextData, TimeData, UniqueAnchor,
+    TextData, TimeData, UniqueAnchor, UUIDData,
 )
 
 try:
@@ -360,6 +361,7 @@ The end."""),
     # The end."""),
     # (pk_obj, 770, TimePKData, datetime.time(10, 42, 37)),
     # (pk_obj, 790, XMLPKData, "<foo></foo>"),
+    (pk_obj, 791, UUIDData, uuid.uuid4()),
 
     (data_obj, 800, AutoNowDateTimeData, datetime.datetime(2006, 6, 16, 10, 42, 37)),
     (data_obj, 810, ModifyingSaveData, 42),