Fix #20158: invalid code in queryset_pickle test models.

tests/queryset_pickle/models.py

@@ -6,16 +6,16 @@ from django.db import models
 from django.utils.translation import ugettext_lazy as _
 
 
-def standalone_number(self):
+def standalone_number():
     return 1
 
 class Numbers(object):
     @staticmethod
-    def get_static_number(self):
+    def get_static_number():
         return 2
 
     @classmethod
-    def get_class_number(self):
+    def get_class_number(cls):
         return 3
 
     def get_member_number(self):

tests/queryset_pickle/tests.py

@@ -9,6 +9,9 @@ from .models import Group, Event, Happening
 
 
 class PickleabilityTestCase(TestCase):
+    def setUp(self):
+        Happening.objects.create() # make sure the defaults are working (#20158)
+
     def assert_pickles(self, qs):
         self.assertEqual(list(pickle.loads(pickle.dumps(qs))), list(qs))