mirror of https://github.com/django/django.git
239 lines
9.3 KiB
Python
239 lines
9.3 KiB
Python
import imp
|
|
import os
|
|
import sys
|
|
import unittest
|
|
from importlib import import_module
|
|
from zipimport import zipimporter
|
|
|
|
from django.test import SimpleTestCase, modify_settings
|
|
from django.test.utils import extend_sys_path
|
|
from django.utils import six
|
|
from django.utils._os import upath
|
|
from django.utils.module_loading import (
|
|
autodiscover_modules, import_string, module_has_submodule,
|
|
)
|
|
|
|
|
|
class DefaultLoader(unittest.TestCase):
|
|
def setUp(self):
|
|
sys.meta_path.insert(0, ProxyFinder())
|
|
|
|
def tearDown(self):
|
|
sys.meta_path.pop(0)
|
|
|
|
def test_loader(self):
|
|
"Normal module existence can be tested"
|
|
test_module = import_module('utils_tests.test_module')
|
|
test_no_submodule = import_module(
|
|
'utils_tests.test_no_submodule')
|
|
|
|
# An importable child
|
|
self.assertTrue(module_has_submodule(test_module, 'good_module'))
|
|
mod = import_module('utils_tests.test_module.good_module')
|
|
self.assertEqual(mod.content, 'Good Module')
|
|
|
|
# A child that exists, but will generate an import error if loaded
|
|
self.assertTrue(module_has_submodule(test_module, 'bad_module'))
|
|
self.assertRaises(ImportError, import_module, 'utils_tests.test_module.bad_module')
|
|
|
|
# A child that doesn't exist
|
|
self.assertFalse(module_has_submodule(test_module, 'no_such_module'))
|
|
self.assertRaises(ImportError, import_module, 'utils_tests.test_module.no_such_module')
|
|
|
|
# A child that doesn't exist, but is the name of a package on the path
|
|
self.assertFalse(module_has_submodule(test_module, 'django'))
|
|
self.assertRaises(ImportError, import_module, 'utils_tests.test_module.django')
|
|
|
|
# Don't be confused by caching of import misses
|
|
import types # NOQA: causes attempted import of utils_tests.types
|
|
self.assertFalse(module_has_submodule(sys.modules['utils_tests'], 'types'))
|
|
|
|
# A module which doesn't have a __path__ (so no submodules)
|
|
self.assertFalse(module_has_submodule(test_no_submodule, 'anything'))
|
|
self.assertRaises(ImportError, import_module,
|
|
'utils_tests.test_no_submodule.anything')
|
|
|
|
|
|
class EggLoader(unittest.TestCase):
|
|
def setUp(self):
|
|
self.egg_dir = '%s/eggs' % os.path.dirname(upath(__file__))
|
|
|
|
def tearDown(self):
|
|
sys.path_importer_cache.clear()
|
|
|
|
sys.modules.pop('egg_module.sub1.sub2.bad_module', None)
|
|
sys.modules.pop('egg_module.sub1.sub2.good_module', None)
|
|
sys.modules.pop('egg_module.sub1.sub2', None)
|
|
sys.modules.pop('egg_module.sub1', None)
|
|
sys.modules.pop('egg_module.bad_module', None)
|
|
sys.modules.pop('egg_module.good_module', None)
|
|
sys.modules.pop('egg_module', None)
|
|
|
|
def test_shallow_loader(self):
|
|
"Module existence can be tested inside eggs"
|
|
egg_name = '%s/test_egg.egg' % self.egg_dir
|
|
with extend_sys_path(egg_name):
|
|
egg_module = import_module('egg_module')
|
|
|
|
# An importable child
|
|
self.assertTrue(module_has_submodule(egg_module, 'good_module'))
|
|
mod = import_module('egg_module.good_module')
|
|
self.assertEqual(mod.content, 'Good Module')
|
|
|
|
# A child that exists, but will generate an import error if loaded
|
|
self.assertTrue(module_has_submodule(egg_module, 'bad_module'))
|
|
self.assertRaises(ImportError, import_module, 'egg_module.bad_module')
|
|
|
|
# A child that doesn't exist
|
|
self.assertFalse(module_has_submodule(egg_module, 'no_such_module'))
|
|
self.assertRaises(ImportError, import_module, 'egg_module.no_such_module')
|
|
|
|
def test_deep_loader(self):
|
|
"Modules deep inside an egg can still be tested for existence"
|
|
egg_name = '%s/test_egg.egg' % self.egg_dir
|
|
with extend_sys_path(egg_name):
|
|
egg_module = import_module('egg_module.sub1.sub2')
|
|
|
|
# An importable child
|
|
self.assertTrue(module_has_submodule(egg_module, 'good_module'))
|
|
mod = import_module('egg_module.sub1.sub2.good_module')
|
|
self.assertEqual(mod.content, 'Deep Good Module')
|
|
|
|
# A child that exists, but will generate an import error if loaded
|
|
self.assertTrue(module_has_submodule(egg_module, 'bad_module'))
|
|
self.assertRaises(ImportError, import_module, 'egg_module.sub1.sub2.bad_module')
|
|
|
|
# A child that doesn't exist
|
|
self.assertFalse(module_has_submodule(egg_module, 'no_such_module'))
|
|
self.assertRaises(ImportError, import_module, 'egg_module.sub1.sub2.no_such_module')
|
|
|
|
|
|
class ModuleImportTestCase(unittest.TestCase):
|
|
def test_import_string(self):
|
|
cls = import_string('django.utils.module_loading.import_string')
|
|
self.assertEqual(cls, import_string)
|
|
|
|
# Test exceptions raised
|
|
self.assertRaises(ImportError, import_string, 'no_dots_in_path')
|
|
msg = 'Module "utils_tests" does not define a "unexistent" attribute'
|
|
with six.assertRaisesRegex(self, ImportError, msg):
|
|
import_string('utils_tests.unexistent')
|
|
|
|
|
|
@modify_settings(INSTALLED_APPS={'append': 'utils_tests.test_module'})
|
|
class AutodiscoverModulesTestCase(SimpleTestCase):
|
|
|
|
def tearDown(self):
|
|
sys.path_importer_cache.clear()
|
|
|
|
sys.modules.pop('utils_tests.test_module.another_bad_module', None)
|
|
sys.modules.pop('utils_tests.test_module.another_good_module', None)
|
|
sys.modules.pop('utils_tests.test_module.bad_module', None)
|
|
sys.modules.pop('utils_tests.test_module.good_module', None)
|
|
sys.modules.pop('utils_tests.test_module', None)
|
|
|
|
def test_autodiscover_modules_found(self):
|
|
autodiscover_modules('good_module')
|
|
|
|
def test_autodiscover_modules_not_found(self):
|
|
autodiscover_modules('missing_module')
|
|
|
|
def test_autodiscover_modules_found_but_bad_module(self):
|
|
with six.assertRaisesRegex(self, ImportError, "No module named '?a_package_name_that_does_not_exist'?"):
|
|
autodiscover_modules('bad_module')
|
|
|
|
def test_autodiscover_modules_several_one_bad_module(self):
|
|
with six.assertRaisesRegex(self, ImportError, "No module named '?a_package_name_that_does_not_exist'?"):
|
|
autodiscover_modules('good_module', 'bad_module')
|
|
|
|
def test_autodiscover_modules_several_found(self):
|
|
autodiscover_modules('good_module', 'another_good_module')
|
|
|
|
def test_autodiscover_modules_several_found_with_registry(self):
|
|
from .test_module import site
|
|
autodiscover_modules('good_module', 'another_good_module', register_to=site)
|
|
self.assertEqual(site._registry, {'lorem': 'ipsum'})
|
|
|
|
def test_validate_registry_keeps_intact(self):
|
|
from .test_module import site
|
|
with six.assertRaisesRegex(self, Exception, "Some random exception."):
|
|
autodiscover_modules('another_bad_module', register_to=site)
|
|
self.assertEqual(site._registry, {})
|
|
|
|
def test_validate_registry_resets_after_erroneous_module(self):
|
|
from .test_module import site
|
|
with six.assertRaisesRegex(self, Exception, "Some random exception."):
|
|
autodiscover_modules('another_good_module', 'another_bad_module', register_to=site)
|
|
self.assertEqual(site._registry, {'lorem': 'ipsum'})
|
|
|
|
def test_validate_registry_resets_after_missing_module(self):
|
|
from .test_module import site
|
|
autodiscover_modules('does_not_exist', 'another_good_module', 'does_not_exist2', register_to=site)
|
|
self.assertEqual(site._registry, {'lorem': 'ipsum'})
|
|
|
|
|
|
class ProxyFinder(object):
|
|
def __init__(self):
|
|
self._cache = {}
|
|
|
|
def find_module(self, fullname, path=None):
|
|
tail = fullname.rsplit('.', 1)[-1]
|
|
try:
|
|
fd, fn, info = imp.find_module(tail, path)
|
|
if fullname in self._cache:
|
|
old_fd = self._cache[fullname][0]
|
|
if old_fd:
|
|
old_fd.close()
|
|
self._cache[fullname] = (fd, fn, info)
|
|
except ImportError:
|
|
return None
|
|
else:
|
|
return self # this is a loader as well
|
|
|
|
def load_module(self, fullname):
|
|
if fullname in sys.modules:
|
|
return sys.modules[fullname]
|
|
fd, fn, info = self._cache[fullname]
|
|
try:
|
|
return imp.load_module(fullname, fd, fn, info)
|
|
finally:
|
|
if fd:
|
|
fd.close()
|
|
|
|
|
|
class TestFinder(object):
|
|
def __init__(self, *args, **kwargs):
|
|
self.importer = zipimporter(*args, **kwargs)
|
|
|
|
def find_module(self, path):
|
|
importer = self.importer.find_module(path)
|
|
if importer is None:
|
|
return
|
|
return TestLoader(importer)
|
|
|
|
|
|
class TestLoader(object):
|
|
def __init__(self, importer):
|
|
self.importer = importer
|
|
|
|
def load_module(self, name):
|
|
mod = self.importer.load_module(name)
|
|
mod.__loader__ = self
|
|
return mod
|
|
|
|
|
|
class CustomLoader(EggLoader):
|
|
"""The Custom Loader test is exactly the same as the EggLoader, but
|
|
it uses a custom defined Loader and Finder that is intentionally
|
|
split into two classes. Although the EggLoader combines both functions
|
|
into one class, this isn't required.
|
|
"""
|
|
def setUp(self):
|
|
super(CustomLoader, self).setUp()
|
|
sys.path_hooks.insert(0, TestFinder)
|
|
sys.path_importer_cache.clear()
|
|
|
|
def tearDown(self):
|
|
super(CustomLoader, self).tearDown()
|
|
sys.path_hooks.pop(0)
|