'If the user is not in the mapping provided to
L{checkers.InMemorySSHKeyDB}, an empty iterator is returned
by L{checkers.InMemorySSHKeyDB.getAuthorizedKeys}'

def test_noKeysForUnauthorizedUser(self):

    keydb = checkers.InMemorySSHKeyDB({'alice': ['keys']})
    self.assertEqual([], list(keydb.getAuthorizedKeys('bob')))
