def test_no_leaking_attributes(self):
"""
Tests that consumers of the objects added by `make_lazy`
cannot accidently get the attributes off of the proxy.
"""
mod = __import__(self.modname)
self.assertNotIsInstance(
mod,
_LazyModuleMarker,
'{mod} should not be lazy yet'.format(mod=self.modname),
)
self.assertFalse(
hasattr(mod, '__mro__'),
'The module object actually has an __mro__, pick another'
' attribute to test',
)
make_lazy(self.modname)
mod = __import__(self.modname)
self.assertIsInstance(
mod,
_LazyModuleMarker,
'{mod} should now be lazy'.format(mod=self.modname),
)
self.assertFalse(
hasattr(mod, '__mro__'),
'{mod} should not leak the abstraction by exposing __mro__'.format(
mod=self.modname,
),
)
def test_is_lazy_module(self):
"""
Tests that `make_lazy` adds lazy module objects
instead of strict module objects.
"""
make_lazy(self.modname)
mod = __import__(self.modname)
self.assertIsInstance(mod, _LazyModuleMarker)
def test_adds_to_modules(self):
"""
Tests that `make_lazy` adds an entry to `sys.modules`.
"""
make_lazy(self.modname)
abc = sys.modules.get(self.modname)
self.assertIsNotNone(
abc,
'make_lazy failed to add {mod} to the system modules'.format(
mod=self.modname,
),
)
self.assertIsInstance(
abc, ModuleType, '{mod} is not a module'.format(mod=self.modname),
)
