Testing Django applications with py.test (EuroPython 2013)

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from django.test import TestCase class TestHelloWorld(TestCase): def
test_hello_world(self): response = self.client.get('/hi/') self.assertEqual(response.status_code, 200) self.assertEqual(response.content, 'Hello World!') fredag 5 juli 13

def test_hello_world(client): response = client.get('/hi/')
assert response.status_code == 200 assert response.content == 'Hello World!' fredag 5 juli 13

$ py.test F =================== FAILURES ==================== _______________ test_hello_world ________________ client
= <django.test.client.Client object at 0x1065f58d0> def test_hello_world(client): response = client.get('/hi/') assert response.status_code == 200 > assert response.content == 'Hello World!' E assert 'Hello EuroPython!' == 'Hello World!' E -‐ Hello EuroPython! E + Hello World! test_hello_world.py:5: AssertionError fredag 5 juli 13

assertAlmostEqual assertAlmostEquals assertDictContainsSubset assertDictEqual assertEqual assertEquals assertFalse assertGreater assertGreaterEqual assertIn
assertIs assertIsInstance assertIsNone assertIsNot assertIsNotNone assertItemsEqual assertLess assertLessEqual assertListEqual assertMultiLineEqual assertNotAlmostEqual assertNotAlmostEquals assertNotEqual assertNotEquals assertNotIn assertNotIsInstance assertNotRegexpMatches assertRaises assertRaisesRegexp assertRegexpMatches assertSequenceEqual assertSetEqual assertTrue assertTupleEqual fredag 5 juli 13

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*OTUBMMTQZUFTUEKBOHPBOEQZUFTU pip install pytest-‐django fredag 5 juli 13

"EETZPVSQSPKFDUUP1ZUIPOQBUI SFRVJSFTBTFUVQQZUPCFQSFTFOU pip install -‐e . fredag 5 juli 13

%FpOF%KBOHPTFUUJOHTJOZPVSTIFMM FOWJSPONFOU export DJANGO_SETTINGS_MODULE=settings fredag 5 juli 13

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$BOBMTPCFDPOpHVSFEJOQZUFTUJOJ [pytest] DJANGO_SETTINGS_MODULE=settings fredag 5 juli 13

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3VOBMMUIFUFTUT $ py.test fredag 5 juli 13

3VOBMMUFTUTJOBTQFDJpDpMF $ py.test test_views.py fredag 5 juli 13

3VOBMMUFTUDBTFTUIBUBSFOBNFE UFTU@GPP $ py.test -‐k test_foo fredag 5 juli 13

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5FTUTDBOMJWFJOUIFJSPXOSPPUEJSFDUPSZ tests/polls/views.py tests/blog/models.py fredag 5 juli 13

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from datetime import datetime, time from django.http import HttpResponse def
greet(request): now = datetime.now().time() if time(5) < now < time(12): greeting = 'morning' elif time(18) < now < time(21): greeting = 'evening' else: greeting = 'day' return HttpResponse('Good %s!' % greeting) fredag 5 juli 13

# greeter.py from datetime import time def greeting_at(time_of_day):
if time(5) < time_of_day < time(12): return 'morning' elif time(18) < time_of_day < time(21): return 'evening' else: return 'day' fredag 5 juli 13

# views.py from datetime import time from django.http import HttpResponse
from .greeter import greeting_at def greet(request): now = datetime.now().time() greeting = greeting_at(now) return HttpResponse('Good %s!' % greeting) fredag 5 juli 13

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5IJTXJMMBMMPXEBUBCBTFBDDFTT import pytest @pytest.mark.django_db def test_user_count(): assert
User.objects.count() == 0 fredag 5 juli 13

5IJTXJMMGBJM EBUBCBTFBDDFTTJTOPU BMMPXFE def test_user_count(): assert User.objects.count()
== 0 fredag 5 juli 13

___________ test_user_count ____________ test_db_access.py:4: in test_user_count > assert
User.objects.count() == 0 ... snip ... E Failed: Database access not allowed, use the "django_db" mark to enable fredag 5 juli 13

.BSLBOFOUJSFNPEVMFGPSEBUBCBTF VTBHF import pytest pytestmark = pytest.mark.django_db def test_foo(): pass
def test_bar(): pass fredag 5 juli 13

3VOBMMUFTUTXIJDIEPFTOPUUPVDIUIF EBUBCBTF $ py.test -‐m 'not django_db' fredag 5 juli
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%KBOHPpYUVSFT [{"model": "myapp.person", "pk": 1, "fields": {"first_name": "John", "last_name": "Lennon"}},
{"model": "myapp.person", "pk": 2, "fields": {"first_name": "Paul", "last_name": "McCartney"}} ] Slow & hard to maintain.. avoid them! fredag 5 juli 13

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from django.db import models class Group(models.Model): name
= models.TextField() class Person(models.Model): first_name = models.TextField() last_name = models.TextField() group = models.ForeignKey(Group) def group_letter(self): return self.group.name[0].upper() fredag 5 juli 13

import factory from yourapp.models import Person, Group class GroupFactory(factory.Factory):
FACTORY_FOR = Group name = 'Developers' class PersonFactory(factory.Factory): FACTORY_FOR = Person first_name = 'John' last_name = 'Doe' group = factory.SubFactory(GroupFactory) fredag 5 juli 13

from yourfactories import PersonFactory def test_group_letter(): person
= PersonFactory.build( group__name='admins') assert person.group_letter() == 'A' fredag 5 juli 13

import pytest @pytest.mark.django_db def test_group_letter(): person =
PersonFactory.create( group__name='admins') assert person.group_letter() == 'A' fredag 5 juli 13

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(FUBOJOTUBODFPGUIFUFTUDMJFOU def test_with_client(client): response = client.get('/foo/')
assert response.status_code == 200 fredag 5 juli 13

5IFTFUUJOHTXJMMCFBVUPNBUJDBMMZSFTFU BGUFSUIFUFTU def test_foo(settings): settings.DATE_FORMAT = 'Y-‐m-‐d'
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$SFBUFZPVSPXOpYUVSFTXJUI QZUFTUpYUVSF import pytest @pytest.fixture def person():
return PersonFactory.build() fredag 5 juli 13

3FRVFTU%KBOHPEBUBCBTFBDDFTT JOBpYUVSF import pytest from your_factories import UserFactory @pytest.fixture def
person_in_db(db): return PersonFactory.create() fredag 5 juli 13

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Testing Django applications with py.test (EuroPython 2013)

Testing Django applications with py.test (EuroPython 2013)

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