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from .. import util
import sys
import unittest
from test import support
class ParentModuleTests:
"""Importing a submodule should import the parent modules."""
def test_import_parent(self):
with util.mock_spec('pkg.__init__', 'pkg.module') as mock:
with util.import_state(meta_path=[mock]):
module = self.__import__('pkg.module')
self.assertIn('pkg', sys.modules)
def test_bad_parent(self):
with util.mock_spec('pkg.module') as mock:
with util.import_state(meta_path=[mock]):
with self.assertRaises(ImportError) as cm:
self.__import__('pkg.module')
self.assertEqual(cm.exception.name, 'pkg')
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_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)
# XXX False
#self.assertIn('pkg.module', sys.modules)
def test_raising_parent_after_double_relative_importing_child(self):
def __init__():
from ..subpkg import module
1/0
mock = util.mock_spec('pkg.__init__', 'pkg.subpkg.__init__',
'pkg.subpkg.module',
module_code={'pkg.subpkg': __init__})
with mock:
with util.import_state(meta_path=[mock]):
with self.assertRaises((ZeroDivisionError, ImportError)):
# This raises ImportError on the "from ..subpkg import module"
# line, not sure why.
self.__import__('pkg.subpkg')
self.assertNotIn('pkg.subpkg', sys.modules)
with self.assertRaises((ZeroDivisionError, ImportError)):
self.__import__('pkg.subpkg.module')
self.assertNotIn('pkg.subpkg', sys.modules)
# XXX False
#self.assertIn('pkg.subpkg.module', sys.modules)
def test_module_not_package(self):
# Try to import a submodule from a non-package should raise ImportError.
assert not hasattr(sys, '__path__')
with self.assertRaises(ImportError) as cm:
self.__import__('sys.no_submodules_here')
self.assertEqual(cm.exception.name, 'sys.no_submodules_here')
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:
support.unload(subname)
(Frozen_ParentTests,
Source_ParentTests
) = util.test_both(ParentModuleTests, __import__=util.__import__)
if __name__ == '__main__':
unittest.main()