Don't barf if PIL is not installed.

rest_framework/tests/test_serializer.py

@@ -3,6 +3,7 @@ from __future__ import unicode_literals
 from django.db import models
 from django.db.models.fields import BLANK_CHOICE_DASH
 from django.test import TestCase
+from django.utils import unittest
 from django.utils.datastructures import MultiValueDict
 from django.utils.translation import ugettext_lazy as _
 from rest_framework import serializers, fields, relations
@@ -12,9 +13,14 @@ from rest_framework.tests.models import (HasPositiveIntegerAsChoice, Album, Acti
 from rest_framework.tests.models import BasicModelSerializer
 import datetime
 import pickle
+try:
+    import PIL
+except:
+    PIL = None
 
 
-class AMOAFModel(RESTFrameworkModel):
+if PIL is not None:
+    class AMOAFModel(RESTFrameworkModel):
         char_field = models.CharField(max_length=1024, blank=True)
         comma_separated_integer_field = models.CommaSeparatedIntegerField(max_length=1024, blank=True)
         decimal_field = models.DecimalField(max_digits=64, decimal_places=32, blank=True)
@@ -24,7 +30,7 @@ class AMOAFModel(RESTFrameworkModel):
         slug_field = models.SlugField(max_length=1024, blank=True)
         url_field = models.URLField(max_length=1024, blank=True)
 
-class DVOAFModel(RESTFrameworkModel):
+    class DVOAFModel(RESTFrameworkModel):
         positive_integer_field = models.PositiveIntegerField(blank=True)
         positive_small_integer_field = models.PositiveSmallIntegerField(blank=True)
         email_field = models.EmailField(blank=True)
@@ -1568,6 +1574,7 @@ class ManyFieldHelpTextTest(TestCase):
         self.assertEqual('Some help text.', rel_field.help_text)
 
 
+@unittest.skipUnless(PIL is not None, 'PIL is not installed')
 class AttributeMappingOnAutogeneratedFieldsTests(TestCase):
 
     def setUp(self):
@@ -1640,6 +1647,7 @@ class AttributeMappingOnAutogeneratedFieldsTests(TestCase):
         self.field_test('url_field')
 
 
+@unittest.skipUnless(PIL is not None, 'PIL is not installed')
 class DefaultValuesOnAutogeneratedFieldsTests(TestCase):
 
     def setUp(self):