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from .. import util
from importlib import machinery
import sys
import types
import unittest
PKG_NAME = 'fine'
SUBMOD_NAME = 'fine.bogus'
class BadSpecFinderLoader:
@classmethod
def find_spec(cls, fullname, path=None, target=None):
if fullname == SUBMOD_NAME:
spec = machinery.ModuleSpec(fullname, cls)
return spec
@staticmethod
def create_module(spec):
return None
@staticmethod
def exec_module(module):
if module.__name__ == SUBMOD_NAME:
raise ImportError('I cannot be loaded!')
class BadLoaderFinder:
@classmethod
def find_module(cls, fullname, path):
if fullname == SUBMOD_NAME:
return cls
@classmethod
def load_module(cls, fullname):
if fullname == SUBMOD_NAME:
raise ImportError('I cannot be loaded!')
class APITest:
"""Test API-specific details for __import__ (e.g. raising the right
exception when passing in an int for the module name)."""
def test_raises_ModuleNotFoundError(self):
with self.assertRaises(ModuleNotFoundError):
util.import_importlib('some module that does not exist')
def test_name_requires_rparition(self):
# Raise TypeError if a non-string is passed in for the module name.
with self.assertRaises(TypeError):
self.__import__(42)
def test_negative_level(self):
# Raise ValueError when a negative level is specified.
# PEP 328 did away with sys.module None entries and the ambiguity of
# absolute/relative imports.
with self.assertRaises(ValueError):
self.__import__('os', globals(), level=-1)
def test_nonexistent_fromlist_entry(self):
# If something in fromlist doesn't exist, that's okay.
# issue15715
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
self.__import__(PKG_NAME, fromlist=['not here'])
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]])
class OldAPITests(APITest):
bad_finder_loader = BadLoaderFinder
(Frozen_OldAPITests,
Source_OldAPITests
) = util.test_both(OldAPITests, __import__=util.__import__)
class SpecAPITests(APITest):
bad_finder_loader = BadSpecFinderLoader
(Frozen_SpecAPITests,
Source_SpecAPITests
) = util.test_both(SpecAPITests, __import__=util.__import__)
if __name__ == '__main__':
unittest.main()