def _nonexistent_flavor_name(self):
        nonexistent_flavor = "sdfsfsdf"
        flavors = instance_types.get_all_types()
        while nonexistent_flavor in flavors:
            nonexistent_flavor += "z"
        else:
            return nonexistent_flavor
return an instance type name not in the DB
dataset/ETHPy150Open nii-cloud/dodai-compute/nova/tests/test_instance_types.py/InstanceTypeTestCase._nonexistent_flavor_name