def test_nested(self):
alice = Knowledge('alice ')
bob = Knowledge()
@bob.simple("about time")
async def touch(message: str):
assert message == 'about time'
return 'time is nothing'
alice.prefix('ask bob ', bob) # make nested knowledge
reply = asyncio.get_event_loop().run_until_complete(alice('alice ask bob about time'))
print("reply", reply)
assert reply == 'time is nothing', 'nested knowledge'
