def test_preimport():
from types import ModuleType
from dummy_replacements import ReplacementRequest
ms = MetaServices()
class ModuleWatcher(ModuleType):
def __init__(self, modname):
self.modname = modname
def __getattribute__(self, name):
modname = ModuleType.__getattribute__(self, 'modname')
logging.info(".......... fetching attr %r of module %r" % (name, modname))
if name == 'Request':
return ReplacementRequest
else:
return ModuleType.__getattribute__(self, name)
ms.subclass_module('dummy_request', ModuleWatcher)
from dummy_webapp import HTTPServer
hs = HTTPServer()
assert isinstance(hs.handle_request(), ReplacementRequest)
def test_postimport():
from dummy_replacements import ReplacementRequest
ms = MetaServices()
def adjust(mod): # function to modify the target module before it is used
mod.Request = ReplacementRequest
ms.call_after_import_of('dummy_webapp', adjust)
from dummy_webapp import HTTPServer
hs = HTTPServer()
assert isinstance(hs.handle_request(), ReplacementRequest)
