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Issue #21200: Return None from pkgutil.get_loader() when __spec__ is missing.

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This commit is contained in:
Eric Snow 2014-04-19 00:13:23 -06:00
parent bddecc3861
commit 658af31372
3 changed files with 22 additions and 1 deletions
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19
Lib/test/test_pkgutil.py
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@ -1,4 +1,4 @@
from test.support import run_unittest, unload, check_warnings
from test.support import run_unittest, unload, check_warnings, CleanImport
import unittest
import sys
import importlib
@ -345,6 +345,23 @@ class ImportlibMigrationTests(unittest.TestCase):
finally:
__loader__ = this_loader
def test_get_loader_handles_missing_spec_attribute(self):
name = 'spam'
mod = type(sys)(name)
del mod.__spec__
with CleanImport(name):
sys.modules[name] = mod
loader = pkgutil.get_loader(name)
self.assertIsNone(loader)
def test_get_loader_handles_spec_attribute_none(self):
name = 'spam'
mod = type(sys)(name)
mod.__spec__ = None
with CleanImport(name):
sys.modules[name] = mod
loader = pkgutil.get_loader(name)
self.assertIsNone(loader)
def test_find_loader_avoids_emulation(self):
with check_warnings() as w: