104 lines
4.4 KiB
Python
104 lines
4.4 KiB
Python
# Copyright 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"). You
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# may not use this file except in compliance with the License. A copy of
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# the License is located at
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#
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# http://aws.amazon.com/apache2.0/
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#
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# or in the "license" file accompanying this file. This file is
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# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
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# ANY KIND, either express or implied. See the License for the specific
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# language governing permissions and limitations under the License.
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import contextlib
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from tests import BaseSessionTest, mock, ClientHTTPStubber
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from botocore.exceptions import ClientError
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from botocore.config import Config
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class TestRetry(BaseSessionTest):
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def setUp(self):
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super(TestRetry, self).setUp()
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self.region = 'us-west-2'
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self.sleep_patch = mock.patch('time.sleep')
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self.sleep_patch.start()
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def tearDown(self):
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self.sleep_patch.stop()
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@contextlib.contextmanager
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def assert_will_retry_n_times(self, client, num_retries):
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num_responses = num_retries + 1
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with ClientHTTPStubber(client) as http_stubber:
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for _ in range(num_responses):
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http_stubber.add_response(status=500, body=b'{}')
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with self.assertRaisesRegexp(
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ClientError, 'reached max retries: %s' % num_retries):
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yield
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self.assertEqual(len(http_stubber.requests), num_responses)
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def test_can_override_max_attempts(self):
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client = self.session.create_client(
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'dynamodb', self.region, config=Config(
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retries={'max_attempts': 1}))
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with self.assert_will_retry_n_times(client, 1):
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client.list_tables()
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def test_do_not_attempt_retries(self):
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client = self.session.create_client(
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'dynamodb', self.region, config=Config(
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retries={'max_attempts': 0}))
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with self.assert_will_retry_n_times(client, 0):
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client.list_tables()
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def test_setting_max_attempts_does_not_set_for_other_clients(self):
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# Make one client with max attempts configured.
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self.session.create_client(
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'codecommit', self.region, config=Config(
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retries={'max_attempts': 1}))
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# Make another client that has no custom retry configured.
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client = self.session.create_client('codecommit', self.region)
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# It should use the default max retries, which should be four retries
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# for this service.
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with self.assert_will_retry_n_times(client, 4):
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client.list_repositories()
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def test_service_specific_defaults_do_not_mutate_general_defaults(self):
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# This tests for a bug where if you created a client for a service
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# with specific retry configurations and then created a client for
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# a service whose retry configurations fallback to the general
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# defaults, the second client would actually use the defaults of
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# the first client.
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# Make a dynamodb client. It's a special case client that is
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# configured to a make a maximum of 10 requests (9 retries).
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client = self.session.create_client('dynamodb', self.region)
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with self.assert_will_retry_n_times(client, 9):
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client.list_tables()
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# A codecommit client is not a special case for retries. It will at
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# most make 5 requests (4 retries) for its default.
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client = self.session.create_client('codecommit', self.region)
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with self.assert_will_retry_n_times(client, 4):
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client.list_repositories()
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def test_set_max_attempts_on_session(self):
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self.session.set_default_client_config(
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Config(retries={'max_attempts': 1}))
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# Max attempts should be inherited from the session.
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client = self.session.create_client('codecommit', self.region)
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with self.assert_will_retry_n_times(client, 1):
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client.list_repositories()
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def test_can_clobber_max_attempts_on_session(self):
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self.session.set_default_client_config(
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Config(retries={'max_attempts': 1}))
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# Max attempts should override the session's configured max attempts.
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client = self.session.create_client(
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'codecommit', self.region, config=Config(
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retries={'max_attempts': 0}))
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with self.assert_will_retry_n_times(client, 0):
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client.list_repositories()
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