def test_shallow_relative_package_import(self):
# Test importing a module from a package through a relative import.
pkg_name = 'pkg'
pkg_long_name = '{0}.__init__'.format(pkg_name)
module_name = 'mod'
absolute_name = '{0}.{1}'.format(pkg_name, module_name)
relative_name = '.{0}'.format(module_name)
with test_util.mock_spec(pkg_long_name, absolute_name) as mock:
with test_util.import_state(meta_path=[mock]):
self.init.import_module(pkg_name)
module = self.init.import_module(relative_name, pkg_name)
self.assertEqual(module.__name__, absolute_name)
def test_fromlist_load_error_propagates(self):
# If something in fromlist triggers an exception not related to not
# existing, let that exception propagate.
# issue15316
mod = types.ModuleType(PKG_NAME)
mod.__path__ = ['XXX']
with util.import_state(meta_path=[self.bad_finder_loader]):
with util.uncache(PKG_NAME):
sys.modules[PKG_NAME] = mod
with self.assertRaises(ImportError):
self.__import__(PKG_NAME,
fromlist=[SUBMOD_NAME.rpartition('.')[-1]])
def test_path_hooks(self):
# Test that sys.path_hooks is used.
# Test that sys.path_importer_cache is set.
module = '<test module>'
path = '<test path>'
importer = util.mock_spec(module)
hook = util.mock_path_hook(path, importer=importer)
with util.import_state(path_hooks=[hook]):
found = self.find(module, [path])
self.check_found(found, importer)
self.assertIn(path, sys.path_importer_cache)
self.assertIs(sys.path_importer_cache[path], importer)
def test_finder_with_find_loader(self):
class TestFinder:
loader = None
portions = []
def find_loader(self, fullname):
return self.loader, self.portions
path = 'testing path'
with util.import_state(path_importer_cache={path: TestFinder()}):
with warnings.catch_warnings():
warnings.simplefilter("ignore", ImportWarning)
self.assertIsNone(
self.machinery.PathFinder.find_spec('whatever', [path]))
success_finder = TestFinder()
success_finder.loader = __loader__
with util.import_state(path_importer_cache={path: success_finder}):
with warnings.catch_warnings():
warnings.simplefilter("ignore", ImportWarning)
spec = self.machinery.PathFinder.find_spec('whatever', [path])
self.assertEqual(spec.loader, __loader__)
def test___loader___missing(self):
with warnings.catch_warnings():
warnings.simplefilter("ignore", ImportWarning)
module = types.ModuleType('blah')
try:
del module.__loader__
except AttributeError:
pass
loader = LoaderMock()
loader.module = module
with util.uncache('blah'), util.import_state(meta_path=[loader]):
module = self.__import__('blah')
self.assertEqual(loader, module.__loader__)
def test_blocked_fromlist(self):
# If fromlist entry is None, let a ModuleNotFoundError propagate.
# issue31642
mod = types.ModuleType(PKG_NAME)
mod.__path__ = []
with util.import_state(meta_path=[self.bad_finder_loader]):
with util.uncache(PKG_NAME, SUBMOD_NAME):
sys.modules[PKG_NAME] = mod
sys.modules[SUBMOD_NAME] = None
with self.assertRaises(ModuleNotFoundError) as cm:
self.__import__(PKG_NAME,
fromlist=[SUBMOD_NAME.rpartition('.')[-1]])
self.assertEqual(cm.exception.name, SUBMOD_NAME)
def test_invalidate_caches_finders(self):
# Finders with an invalidate_caches() method have it called.
class FakeFinder:
def __init__(self):
self.called = False
def invalidate_caches(self):
self.called = True
cache = {'leave_alone': object(), 'finder_to_invalidate': FakeFinder()}
with util.import_state(path_importer_cache=cache):
self.machinery.PathFinder.invalidate_caches()
self.assertTrue(cache['finder_to_invalidate'].called)
def test_empty_path_hooks(self):
# Test that if sys.path_hooks is empty a warning is raised,
# sys.path_importer_cache gets None set, and PathFinder returns None.
path_entry = 'bogus_path'
with util.import_state(path_importer_cache={},
path_hooks=[],
path=[path_entry]):
with warnings.catch_warnings(record=True) as w:
warnings.simplefilter('always', ImportWarning)
warnings.simplefilter('ignore', DeprecationWarning)
self.assertIsNone(self.find('os'))
self.assertIsNone(sys.path_importer_cache[path_entry])
self.assertEqual(len(w), 1)
self.assertTrue(issubclass(w[-1].category, ImportWarning))
def test_module_from_package_triggers_ModuleNotFoundError(self):
# If a submodule causes an ModuleNotFoundError because it tries
# to import a module which doesn't exist, that should let the
# ModuleNotFoundError propagate.
def module_code():
import i_do_not_exist
with util.mock_spec('pkg.__init__',
'pkg.mod',
module_code={'pkg.mod': module_code}) as importer:
with util.import_state(meta_path=[importer]):
with self.assertRaises(ModuleNotFoundError) as exc:
self.__import__('pkg', fromlist=['mod'])
self.assertEqual('i_do_not_exist', exc.exception.name)
def namespace_tree_context(**kwargs):
"""
Save import state and sys.modules cache and restore it on exit.
Typical usage:
>>> with namespace_tree_context(path=['/tmp/xxyy/portion1',
... '/tmp/xxyy/portion2']):
... pass
"""
kwargs.setdefault('meta_path', sys.meta_path)
kwargs.setdefault('path_hooks', sys.path_hooks)
import_context = util.import_state(**kwargs)
with import_context, sys_modules_context():
yield
def test_empty(self):
# Raise an ImportWarning if sys.meta_path is empty.
module_name = 'nothing'
try:
del sys.modules[module_name]
except KeyError:
pass
with util.import_state(meta_path=[]):
with warnings.catch_warnings(record=True) as w:
warnings.simplefilter('always')
self.assertIsNone(
importlib._bootstrap._find_spec('nothing', None))
self.assertEqual(len(w), 1)
self.assertTrue(issubclass(w[-1].category, ImportWarning))
def test_module_replaced(self):
def code():
import sys
module = type(sys)('top_level')
module.spam = 3
sys.modules['top_level'] = module
mock = test_util.mock_spec('top_level',
module_code={'top_level': code})
with mock:
with test_util.import_state(meta_path=[mock]):
module = self.init.import_module('top_level')
reloaded = self.init.reload(module)
actual = sys.modules['top_level']
self.assertEqual(actual.spam, 3)
self.assertEqual(reloaded.spam, 3)
def test_module_replaced(self):
# see #18698
def code():
module = type(sys)('top_level')
module.spam = 3
sys.modules['top_level'] = module
mock = util.mock_modules('top_level', module_code={'top_level': code})
with mock:
with util.import_state(meta_path=[mock]):
module = importlib.import_module('top_level')
reloaded = imp.reload(module)
actual = sys.modules['top_level']
self.assertEqual(actual.spam, 3)
self.assertEqual(reloaded.spam, 3)
def relative_import_test(self, create, globals_, callback):
"""Abstract out boilerplace for setting up for an import test."""
uncache_names = []
for name in create:
if not name.endswith('.__init__'):
uncache_names.append(name)
else:
uncache_names.append(name[:-len('.__init__')])
with util.mock_spec(*create) as importer:
with util.import_state(meta_path=[importer]):
with warnings.catch_warnings():
warnings.simplefilter("ignore")
for global_ in globals_:
with util.uncache(*uncache_names):
callback(global_)
def test_module_replaced(self):
# see #18698
def code():
module = type(sys)('top_level')
module.spam = 3
sys.modules['top_level'] = module
mock = util.mock_modules('top_level',
module_code={'top_level': code})
with mock:
with util.import_state(meta_path=[mock]):
module = importlib.import_module('top_level')
reloaded = imp.reload(module)
actual = sys.modules['top_level']
self.assertEqual(actual.spam, 3)
self.assertEqual(reloaded.spam, 3)
def test_no_path(self):
# [no path]
mod_name = 'top_level'
assert '.' not in mod_name
with self.mock_modules(mod_name) as importer:
log, wrapped_call = self.log_finder(importer)
setattr(importer, self.finder_name,
MethodType(wrapped_call, importer))
with util.import_state(meta_path=[importer]):
self.__import__(mod_name)
assert len(log) == 1
args = log[0][0]
# Assuming all arguments are positional.
self.assertEqual(args[0], mod_name)
self.assertIsNone(args[1])
def namespace_tree_context(**kwargs):
"""
Save import state and sys.modules cache and restore it on exit.
Typical usage:
>>> with namespace_tree_context(path=['/tmp/xxyy/portion1',
... '/tmp/xxyy/portion2']):
... pass
"""
# use default meta_path and path_hooks unless specified otherwise
kwargs.setdefault('meta_path', sys.meta_path)
kwargs.setdefault('path_hooks', sys.path_hooks)
import_context = util.import_state(**kwargs)
with import_context, sys_modules_context():
yield
def test_loaded_once(self):
# Issue #13591: Modules should only be loaded once when
# initializing the parent package attempts to import the
# module currently being imported.
b_load_count = 0
def load_a():
self.init.import_module('a.b')
def load_b():
nonlocal b_load_count
b_load_count += 1
code = {'a': load_a, 'a.b': load_b}
modules = ['a.__init__', 'a.b']
with test_util.mock_spec(*modules, module_code=code) as mock:
with test_util.import_state(meta_path=[mock]):
self.init.import_module('a.b')
self.assertEqual(b_load_count, 1)
def test_module_not_package_but_side_effects(self):
# If a module injects something into sys.modules as a side-effect, then
# pick up on that fact.
name = 'mod'
subname = name + '.b'
def module_injection():
sys.modules[subname] = 'total bunk'
mock_spec = util.mock_spec('mod',
module_code={'mod': module_injection})
with mock_spec as mock:
with util.import_state(meta_path=[mock]):
try:
submodule = self.__import__(subname)
finally:
import_helper.unload(subname)
def test_raising_parent_after_relative_importing_child(self):
def __init__():
from . import module
1 / 0
mock = util.mock_spec('pkg.__init__',
'pkg.module',
module_code={'pkg': __init__})
with mock:
with util.import_state(meta_path=[mock]):
with self.assertRaises((ZeroDivisionError, ImportError)):
# This raises ImportError on the "from . import module"
# line, not sure why.
self.__import__('pkg')
self.assertNotIn('pkg', sys.modules)
with self.assertRaises((ZeroDivisionError, ImportError)):
self.__import__('pkg.module')
self.assertNotIn('pkg', sys.modules)
def test_raising_parent_after_importing_child(self):
def __init__():
import pkg.module
1 / 0
mock = util.mock_spec('pkg.__init__',
'pkg.module',
module_code={'pkg': __init__})
with mock:
with util.import_state(meta_path=[mock]):
with self.assertRaises(ZeroDivisionError):
self.__import__('pkg')
self.assertNotIn('pkg', sys.modules)
self.assertIn('pkg.module', sys.modules)
with self.assertRaises(ZeroDivisionError):
self.__import__('pkg.module')
self.assertNotIn('pkg', sys.modules)
self.assertIn('pkg.module', sys.modules)
def test_finder_with_failing_find_spec(self):
# PathEntryFinder with find_module() defined should work.
# Issue #20763.
class Finder:
path_location = 'test_finder_with_find_module'
def __init__(self, path):
if path != self.path_location:
raise ImportError
@staticmethod
def find_module(fullname):
return None
with util.import_state(path=[Finder.path_location] + sys.path[:],
path_hooks=[Finder]):
with warnings.catch_warnings():
warnings.simplefilter("ignore", ImportWarning)
self.machinery.PathFinder.find_spec('importlib')
def test_with_path(self):
# [path set]
pkg_name = 'pkg'
mod_name = pkg_name + '.module'
path = [42]
assert '.' in mod_name
with self.mock_modules(pkg_name + '.__init__', mod_name) as importer:
importer.modules[pkg_name].__path__ = path
log, wrapped_call = self.log_finder(importer)
setattr(importer, self.finder_name,
MethodType(wrapped_call, importer))
with util.import_state(meta_path=[importer]):
self.__import__(mod_name)
assert len(log) == 2
args = log[1][0]
kwargs = log[1][1]
# Assuming all arguments are positional.
self.assertFalse(kwargs)
self.assertEqual(args[0], mod_name)
self.assertIs(args[1], path)
def test_deleted_cwd(self):
# Issue #22834
old_dir = os.getcwd()
self.addCleanup(os.chdir, old_dir)
new_dir = tempfile.mkdtemp()
try:
os.chdir(new_dir)
try:
os.rmdir(new_dir)
except OSError:
# EINVAL on Solaris, EBUSY on AIX, ENOTEMPTY on Windows
self.skipTest("platform does not allow "
"the deletion of the cwd")
except:
os.chdir(old_dir)
os.rmdir(new_dir)
raise
with util.import_state(path=['']):
# Do not want FileNotFoundError raised.
self.assertIsNone(self.machinery.PathFinder.find_spec('whatever'))
def test___loader__(self):
loader = SpecLoaderMock()
with util.uncache('blah'), util.import_state(meta_path=[loader]):
module = self.__import__('blah')
self.assertEqual(loader, module.__loader__)
def test_empty_string(self):
with util.mock_spec('pkg.__init__', 'pkg.mod') as importer:
with util.import_state(meta_path=[importer]):
module = self.__import__('pkg.mod', fromlist=[''])
self.assertEqual(module.__name__, 'pkg.mod')
def test_nonexistent_from_package(self):
with util.mock_spec('pkg.__init__') as importer:
with util.import_state(meta_path=[importer]):
module = self.__import__('pkg', fromlist=['non_existent'])
self.assertEqual(module.__name__, 'pkg')
self.assertFalse(hasattr(module, 'non_existent'))
def test_object(self):
# [object case]
with util.mock_spec('module') as importer:
with util.import_state(meta_path=[importer]):
module = self.__import__('module', fromlist=['attr'])
self.assertEqual(module.__name__, 'module')
def test_return_from_from_import(self):
# [from return]
with util.mock_spec('pkg.__init__', 'pkg.module') as importer:
with util.import_state(meta_path=[importer]):
module = self.__import__('pkg.module', fromlist=['attr'])
self.assertEqual(module.__name__, 'pkg.module')
def test_module_import(self):
# Test importing a top-level module.
with test_util.mock_spec('top_level') as mock:
with test_util.import_state(meta_path=[mock]):
module = self.init.import_module('top_level')
self.assertEqual(module.__name__, 'top_level')
def test_invalidate_caches_clear_out_None(self):
# Clear out None in sys.path_importer_cache() when invalidating caches.
cache = {'clear_out': None}
with util.import_state(path_importer_cache=cache):
self.machinery.PathFinder.invalidate_caches()
self.assertEqual(len(cache), 0)
def test_failure(self):
# Test None returned upon not finding a suitable loader.
module = '<test module>'
with util.import_state():
self.assertIsNone(self.find(module))