43 lines
1.6 KiB
Python
43 lines
1.6 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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from neutron.common import constants as n_const
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from neutron.tests import base
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def create_resource(prefix, creation_func, *args, **kwargs):
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"""Create a new resource that does not already exist.
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If prefix isn't 'max_length' in size, a random suffix is concatenated to
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ensure it is random. Otherwise, 'prefix' is used as is.
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:param prefix: The prefix for a randomly generated name
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:param creation_func: A function taking the name of the resource
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to be created as it's first argument. An error is assumed
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to indicate a name collision.
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:param *args *kwargs: These will be passed to the create function.
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"""
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# Don't generate a random name if prefix is already full-length.
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if len(prefix) == n_const.DEVICE_NAME_MAX_LEN:
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return creation_func(prefix, *args, **kwargs)
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while True:
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name = base.get_rand_name(
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max_length=n_const.DEVICE_NAME_MAX_LEN,
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prefix=prefix)
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try:
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return creation_func(name, *args, **kwargs)
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except RuntimeError:
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pass
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