90 lines
3.4 KiB
Python
90 lines
3.4 KiB
Python
#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from oslo_db import exception as db_exc
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from sqlalchemy.orm import exc
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import testtools
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from neutron.common import exceptions
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from neutron.db import api as db_api
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from neutron.tests import base
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class TestExceptionToRetryContextManager(base.BaseTestCase):
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def test_translates_single_exception(self):
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with testtools.ExpectedException(db_exc.RetryRequest):
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with db_api.exc_to_retry(ValueError):
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raise ValueError()
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def test_translates_multiple_exception_types(self):
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with testtools.ExpectedException(db_exc.RetryRequest):
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with db_api.exc_to_retry((ValueError, TypeError)):
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raise TypeError()
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def test_passes_other_exceptions(self):
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with testtools.ExpectedException(ValueError):
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with db_api.exc_to_retry(TypeError):
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raise ValueError()
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def test_inner_exception_preserved_in_retryrequest(self):
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try:
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exc = ValueError('test')
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with db_api.exc_to_retry(ValueError):
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raise exc
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except db_exc.RetryRequest as e:
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self.assertEqual(exc, e.inner_exc)
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def test_retries_on_multi_exception_containing_target(self):
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with testtools.ExpectedException(db_exc.RetryRequest):
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with db_api.exc_to_retry(ValueError):
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e = exceptions.MultipleExceptions([ValueError(), TypeError()])
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raise e
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class TestDeadLockDecorator(base.BaseTestCase):
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@db_api.retry_db_errors
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def _decorated_function(self, fail_count, exc_to_raise):
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self.fail_count = getattr(self, 'fail_count', fail_count + 1) - 1
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if self.fail_count:
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raise exc_to_raise
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def test_regular_exception_excluded(self):
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with testtools.ExpectedException(ValueError):
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self._decorated_function(1, ValueError)
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def test_staledata_error_caught(self):
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e = exc.StaleDataError()
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self.assertIsNone(self._decorated_function(1, e))
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def test_multi_exception_contains_deadlock(self):
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e = exceptions.MultipleExceptions([ValueError(), db_exc.DBDeadlock()])
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self.assertIsNone(self._decorated_function(1, e))
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def test_multi_nested_exception_contains_deadlock(self):
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i = exceptions.MultipleExceptions([ValueError(), db_exc.DBDeadlock()])
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e = exceptions.MultipleExceptions([ValueError(), i])
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self.assertIsNone(self._decorated_function(1, e))
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def test_multi_exception_raised_on_exceed(self):
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e = exceptions.MultipleExceptions([ValueError(), db_exc.DBDeadlock()])
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with testtools.ExpectedException(exceptions.MultipleExceptions):
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self._decorated_function(db_api.MAX_RETRIES + 1, e)
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def test_mysql_savepoint_error(self):
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e = db_exc.DBError("(pymysql.err.InternalError) (1305, u'SAVEPOINT "
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"sa_savepoint_1 does not exist')")
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self.assertIsNone(self._decorated_function(1, e))
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