Testen Sie das Hochladen von Bildern, indem Sie in Python erstellen, ohne Dummy-Bilddateien in Django zu platzieren

Sie können den Upload auch dann testen, wenn Sie die Bilddatei lokal ablegen, um sie jedoch im Testcode zu vervollständigen.

Beispiel-App erstellen

(python2.7, django1.6)

$ django-admin.py startproject core
$ mv core photo_book
$ cd photo_book
$ python manage.py startapp photos
$ mkdir -p static/upload  #Verzeichnis zum Speichern von Bildern

core/

settings.py

#Nur zusätzliche Teile
IINSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'photos',  #hinzufügen
)

MEDIA_ROOT = os.path.join(BASE_DIR, 'static/')  #hinzufügen

urls.py

from django.conf.urls import patterns, include, url

from django.contrib import admin
admin.autodiscover()

from photos.views import ImageCreateView

urlpatterns = patterns(
    '',
    url(r'^images/$', ImageCreateView.as_view(), name='images'),
    url(r'^admin/', include(admin.site.urls)),
)

photos/

Modell-

models.py

from django.db import models


class Photo(models.Model):
    image = models.ImageField(upload_to='upload')

Bilden

forms.py

from django import forms


class PhotoForm(forms.Form):
    image = forms.ImageField()

Aussicht

views.py

from django.views.generic.edit import CreateView

from photos.models import Photo


class ImageCreateView(CreateView):
    model = Photo
    success_url = '/'

Prüfung

test.py

from StringIO import StringIO

from django.core.urlresolvers import reverse
from django.test import TestCase
from photos.models import Photo


class CreateImageTest(TestCase):
    def test_post(self):
        url = reverse("images")

        dummy_image = StringIO(
            'GIF87a\x01\x00\x01\x00\x80\x01\x00\x00\x00\x00ccc,\x00'
            '\x00\x00\x00\x01\x00\x01\x00\x00\x02\x02D\x01\x00;'
        )
        dummy_image.name = 'dummy_image.gif'
        dummy_image.content_type = 'image/gif'
        response = self.client.post(url, {'image': dummy_image})

        self.assertEqual(response.status_code, 302)
        #Überprüfen Sie, ob es in db gespeichert wurde
        self.assertEqual(Photo.objects.count(), 1)
        #Überprüfen Sie, ob das gespeicherte Bild und das hochgeladene Dummy-Bild identisch sind
        uploaded_image = StringIO(open(Photo.objects.last().image._get_path(), 'rb').read())
        self.assertEqual(uploaded_image.getvalue(), dummy_image.getvalue())

Testlauf

$ python manage.py test
Creating test database for alias 'default'...
.
----------------------------------------------------------------------
Ran 1 test in 0.042s

OK
Destroying test database for alias 'default'...

Referenz

• http://stackoverflow.com/questions/2473392/unit-testing-a-django-form-with-a-filefield
• http://stackoverflow.com/questions/22535240/in-django-which-format-does-models-imagefield-take-by-default