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from __future__ import with_statement
from django.test import TestCase
from models import Person
class AssertNumQueriesTests(TestCase):
def test_simple(self):
with self.assertNumQueries(0):
pass
with self.assertNumQueries(1):
# Guy who wrote Linux
Person.objects.create(name="Linus Torvalds")
with self.assertNumQueries(2):
# Guy who owns the bagel place I like
Person.objects.create(name="Uncle Ricky")
self.assertEqual(Person.objects.count(), 2)
def test_failure(self):
with self.assertRaises(AssertionError) as exc_info:
with self.assertNumQueries(2):
Person.objects.count()
self.assertEqual(str(exc_info.exception), "1 != 2 : 1 queries executed, 2 expected")
with self.assertRaises(TypeError):
with self.assertNumQueries(4000):
raise TypeError
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