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from django.test import TestCase
from models import A, B, D
class SimpleTest(TestCase):
def setUp(self):
self.a1 = A.objects.create()
self.a2 = A.objects.create()
for x in range(20):
B.objects.create(a=self.a1)
D.objects.create(a=self.a1)
def test_nonempty_update(self):
"""
Test that update changes the right number of rows for a nonempty queryset
"""
num_updated = self.a1.b_set.update(y=100)
self.failUnlessEqual(num_updated, 20)
cnt = B.objects.filter(y=100).count()
self.failUnlessEqual(cnt, 20)
def test_empty_update(self):
"""
Test that update changes the right number of rows for an empty queryset
"""
num_updated = self.a2.b_set.update(y=100)
self.failUnlessEqual(num_updated, 0)
cnt = B.objects.filter(y=100).count()
self.failUnlessEqual(cnt, 0)
def test_nonempty_update_with_inheritance(self):
"""
Test that update changes the right number of rows for an empty queryset
when the update affects only a base table
"""
num_updated = self.a1.d_set.update(y=100)
self.failUnlessEqual(num_updated, 20)
cnt = D.objects.filter(y=100).count()
self.failUnlessEqual(cnt, 20)
def test_empty_update_with_inheritance(self):
"""
Test that update changes the right number of rows for an empty queryset
when the update affects only a base table
"""
num_updated = self.a2.d_set.update(y=100)
self.failUnlessEqual(num_updated, 0)
cnt = D.objects.filter(y=100).count()
self.failUnlessEqual(cnt, 0)
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