rehome used neutron.tests.tools

This patch rehomes the OpenFixture class and reset_random_seed function
both which are from neutron.tests.tools as they are used by consumers
today [1].

[1] http://codesearch.openstack.org/?q=from%20neutron.tests%20import%20tools

Change-Id: I3d13a747f31e39c11f42e2f543eae3823cfbe356
This commit is contained in:
Boden R 2019-03-08 12:16:27 -07:00
parent fc2a81058b
commit ef9c2ae111
3 changed files with 39 additions and 0 deletions

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@ -286,3 +286,25 @@ class DBResourceExtendFixture(fixtures.Fixture):
def _restore(self):
resource_extend._resource_extend_functions = self._backup
class OpenFixture(fixtures.Fixture):
"""Mock access to a specific file while preserving open for others."""
def __init__(self, filepath, contents=''):
self.path = filepath
self.contents = contents
def _setUp(self):
self.mock_open = mock.mock_open(read_data=self.contents)
self._orig_open = open
def replacement_open(name, *args, **kwargs):
if name == self.path:
return self.mock_open(name, *args, **kwargs)
return self._orig_open(name, *args, **kwargs)
self._patch = mock.patch('six.moves.builtins.open',
new=replacement_open)
self._patch.start()
self.addCleanup(self._patch.stop)

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@ -13,8 +13,10 @@
# License for the specific language governing permissions and limitations
# under the License.
import os
import platform
import random
import time
import warnings
import fixtures
@ -66,3 +68,13 @@ def get_random_cidr(version=4):
random.randint(3, 254),
24)
return '2001:db8:%x::/%d' % (random.getrandbits(16), 64)
def reset_random_seed():
# reset random seed to make sure other processes extracting values from RNG
# don't get the same results (useful especially when you then use the
# random values to allocate system resources from global pool, like ports
# to listen). Use both current time and pid to make sure no tests started
# at the same time get the same values from RNG
seed = time.time() + os.getpid()
random.seed(seed)

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@ -0,0 +1,5 @@
---
features:
- The ``OpenFixture`` class is now available in ``neutron_lib.fixtures``.
- The ``reset_random_seed`` function is now available in
``neutron_lib.tests.tools``.