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from .. import util as importlib_test_util
from . import util
import imp
import sys
import unittest
class BadLoaderFinder:
bad = 'fine.bogus'
@classmethod
def find_module(cls, fullname, path):
if fullname == cls.bad:
return cls
@classmethod
def load_module(cls, fullname):
if fullname == cls.bad:
raise ImportError('I cannot be loaded!')
class APITest(unittest.TestCase):
"""Test API-specific details for __import__ (e.g. raising the right
exception when passing in an int for the module name)."""
def test_name_requires_rparition(self):
# Raise TypeError if a non-string is passed in for the module name.
with self.assertRaises(TypeError):
util.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):
util.import_('os', globals(), level=-1)
def test_nonexistent_fromlist_entry(self):
# If something in fromlist doesn't exist, that's okay.
# issue15715
mod = imp.new_module('fine')
mod.__path__ = ['XXX']
with importlib_test_util.import_state(meta_path=[BadLoaderFinder]):
with importlib_test_util.uncache('fine'):
sys.modules['fine'] = mod
util.import_('fine', 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 = imp.new_module('fine')
mod.__path__ = ['XXX']
with importlib_test_util.import_state(meta_path=[BadLoaderFinder]):
with importlib_test_util.uncache('fine'):
sys.modules['fine'] = mod
with self.assertRaises(ImportError):
util.import_('fine', fromlist=['bogus'])
def test_main():
from test.support import run_unittest
run_unittest(APITest)
if __name__ == '__main__':
test_main()