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Merged revisions 74584 via svnmerge from

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svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r74584 | brett.cannon | 2009-08-29 20:47:36 -0700 (Sat, 29 Aug 2009) | 3 lines

  Have importlib raise ImportError if None is found in sys.modules. This matches
  current import semantics.
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This commit is contained in:
Brett Cannon 2009-08-30 04:29:47 +00:00
parent af0312af7a
commit 8a1a59f0ec
3 changed files with 23 additions and 5 deletions
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18
Lib/importlib/test/import_/test_caching.py
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@ -17,15 +17,25 @@ class UseCache(unittest.TestCase):
loader returns) [from cache on return]. This also applies to imports of
things contained within a package and thus get assigned as an attribute
[from cache to attribute] or pulled in thanks to a fromlist import
[from cache for fromlist].
[from cache for fromlist]. But if sys.modules contains None then
ImportError is raised [None in cache].
"""
def test_using_cache(self):
# [use cache]
module_to_use = "some module found!"
sys.modules['some_module'] = module_to_use
module = import_util.import_('some_module')
self.assertEqual(id(module_to_use), id(module))
with util.uncache(module_to_use):
sys.modules['some_module'] = module_to_use
module = import_util.import_('some_module')
self.assertEqual(id(module_to_use), id(module))
def test_None_in_cache(self):
#[None in cache]
name = 'using_None'
with util.uncache(name):
sys.modules[name] = None
with self.assertRaises(ImportError):
import_util.import_(name)
def create_mock(self, *names, return_=None):
mock = util.mock_modules(*names)