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from __future__ import unicode_literals
import os
from django.apps import apps
from django.test import SimpleTestCase
from django.test.utils import extend_sys_path
from django.utils import six
from django.utils._os import upath
class EggLoadingTest(SimpleTestCase):
def setUp(self):
self.egg_dir = '%s/eggs' % os.path.dirname(upath(__file__))
def tearDown(self):
apps.clear_cache()
def test_egg1(self):
"""Models module can be loaded from an app in an egg"""
egg_name = '%s/modelapp.egg' % self.egg_dir
with extend_sys_path(egg_name):
with self.settings(INSTALLED_APPS=['app_with_models']):
models_module = apps.get_app_config('app_with_models').models_module
self.assertIsNotNone(models_module)
del apps.all_models['app_with_models']
def test_egg2(self):
"""Loading an app from an egg that has no models returns no models (and no error)"""
egg_name = '%s/nomodelapp.egg' % self.egg_dir
with extend_sys_path(egg_name):
with self.settings(INSTALLED_APPS=['app_no_models']):
models_module = apps.get_app_config('app_no_models').models_module
self.assertIsNone(models_module)
del apps.all_models['app_no_models']
def test_egg3(self):
"""Models module can be loaded from an app located under an egg's top-level package"""
egg_name = '%s/omelet.egg' % self.egg_dir
with extend_sys_path(egg_name):
with self.settings(INSTALLED_APPS=['omelet.app_with_models']):
models_module = apps.get_app_config('app_with_models').models_module
self.assertIsNotNone(models_module)
del apps.all_models['app_with_models']
def test_egg4(self):
"""Loading an app with no models from under the top-level egg package generates no error"""
egg_name = '%s/omelet.egg' % self.egg_dir
with extend_sys_path(egg_name):
with self.settings(INSTALLED_APPS=['omelet.app_no_models']):
models_module = apps.get_app_config('app_no_models').models_module
self.assertIsNone(models_module)
del apps.all_models['app_no_models']
def test_egg5(self):
"""Loading an app from an egg that has an import error in its models module raises that error"""
egg_name = '%s/brokenapp.egg' % self.egg_dir
with extend_sys_path(egg_name):
with six.assertRaisesRegex(self, ImportError, 'modelz'):
with self.settings(INSTALLED_APPS=['broken_app']):
pass
class GetModelsTest(SimpleTestCase):
def setUp(self):
from .not_installed import models
self.not_installed_module = models
def test_get_model_only_returns_installed_models(self):
with self.assertRaises(LookupError):
apps.get_model("not_installed", "NotInstalledModel")
def test_get_models_only_returns_installed_models(self):
self.assertNotIn(
"NotInstalledModel",
[m.__name__ for m in apps.get_models()])
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