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# Copyright 2012-2014 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"). You
# may not use this file except in compliance with the License. A copy of
# the License is located at
#
# http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file is
# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
# ANY KIND, either express or implied. See the License for the specific
# language governing permissions and limitations under the License.
import os
from tests import unittest, BaseEnvVar
import mock
import botocore
from botocore.compat import six
from botocore.exceptions import ClientError, WaiterConfigError, WaiterError
from botocore.waiter import Waiter, WaiterModel, SingleWaiterConfig
from botocore.waiter import create_waiter_with_client
from botocore.waiter import NormalizedOperationMethod
from botocore.loaders import Loader
from botocore.model import ServiceModel
class TestWaiterModel(unittest.TestCase):
def setUp(self):
self.boiler_plate_config = {
'description': 'Waiter description',
'operation': 'HeadBucket',
'delay': 5,
'maxAttempts': 20,
}
def create_acceptor_function(self, for_config):
single_waiter = {
'acceptors': [for_config]
}
single_waiter.update(self.boiler_plate_config)
config = SingleWaiterConfig(single_waiter)
return config.acceptors[0].matcher_func
def test_waiter_version(self):
self.assertEqual(WaiterModel({'version': 2, 'waiters': {}}).version, 2)
def test_wont_load_missing_version_in_config(self):
# We only load waiter configs if we know for sure that we're
# loading version 2 of the format.
waiters = {
# Missing the 'version' key.
'waiters': {}
}
with self.assertRaises(WaiterConfigError):
WaiterModel(waiters)
def test_unsupported_waiter_version(self):
waiters = {
'version': 1,
'waiters': {}
}
with self.assertRaises(WaiterConfigError):
WaiterModel(waiters)
def test_waiter_names(self):
waiters = {
'version': 2,
'waiters': {
'BarWaiter': {},
'FooWaiter': {},
}
}
self.assertEqual(WaiterModel(waiters).waiter_names, ['BarWaiter',
'FooWaiter'])
def test_get_single_waiter_config(self):
single_waiter = {
'description': 'Waiter description',
'operation': 'HeadBucket',
'delay': 5,
'maxAttempts': 20,
'acceptors': [
{'state': 'success', 'matcher': 'status', 'expected': 200},
{'state': 'retry', 'matcher': 'status', 'expected': 404},
],
}
waiters = {
'version': 2,
'waiters': {
'BucketExists': single_waiter,
}
}
model = WaiterModel(waiters)
config = model.get_waiter('BucketExists')
self.assertEqual(config.operation, 'HeadBucket')
def test_get_waiter_does_not_exist(self):
waiters = {
'version': 2,
'waiters': {}
}
model = WaiterModel(waiters)
with self.assertRaises(ValueError):
model.get_waiter('UnknownWaiter')
def test_single_waiter_config_attributes(self):
single_waiter = {
'description': 'Waiter description',
'operation': 'HeadBucket',
'delay': 5,
'maxAttempts': 20,
'acceptors': [
],
}
config = SingleWaiterConfig(single_waiter)
self.assertEqual(config.description, 'Waiter description')
self.assertEqual(config.operation, 'HeadBucket')
self.assertEqual(config.delay, 5)
self.assertEqual(config.max_attempts, 20)
def test_single_waiter_acceptors_built_with_matcher_func(self):
# When the list of acceptors are requested, we actually will transform
# them into values that are easier to use.
single_waiter = {
'acceptors': [
{'state': 'success', 'matcher': 'status', 'expected': 200},
],
}
single_waiter.update(self.boiler_plate_config)
config = SingleWaiterConfig(single_waiter)
success_acceptor = config.acceptors[0]
self.assertEqual(success_acceptor.state, 'success')
self.assertEqual(success_acceptor.matcher, 'status')
self.assertEqual(success_acceptor.expected, 200)
self.assertTrue(callable(success_acceptor.matcher_func))
def test_single_waiter_acceptor_matches_jmespath(self):
single_waiter = {
'acceptors': [
{'state': 'success', 'matcher': 'path',
'argument': 'Table.TableStatus', 'expected': 'ACCEPTED'},
],
}
single_waiter.update(self.boiler_plate_config)
config = SingleWaiterConfig(single_waiter)
success_acceptor = config.acceptors[0].matcher_func
# success_acceptor is a callable that takes a response dict and returns
# True or False.
self.assertTrue(
success_acceptor({'Table': {'TableStatus': 'ACCEPTED'}}))
self.assertFalse(
success_acceptor({'Table': {'TableStatus': 'CREATING'}}))
def test_single_waiter_supports_status_code(self):
single_waiter = {
'acceptors': [
{'state': 'success', 'matcher': 'status',
'expected': 200}
],
}
single_waiter.update(self.boiler_plate_config)
config = SingleWaiterConfig(single_waiter)
success_acceptor = config.acceptors[0].matcher_func
self.assertTrue(
success_acceptor({'ResponseMetadata': {'HTTPStatusCode': 200}}))
self.assertFalse(
success_acceptor({'ResponseMetadata': {'HTTPStatusCode': 404}}))
def test_single_waiter_supports_error(self):
single_waiter = {
'acceptors': [
{'state': 'success', 'matcher': 'error',
'expected': 'DoesNotExistError'}
],
}
single_waiter.update(self.boiler_plate_config)
config = SingleWaiterConfig(single_waiter)
success_acceptor = config.acceptors[0].matcher_func
self.assertTrue(
success_acceptor({'Error': {'Code': 'DoesNotExistError'}}))
self.assertFalse(
success_acceptor({'Error': {'Code': 'DoesNotExistErorr'}}))
def test_unknown_matcher(self):
unknown_type = 'arbitrary_type'
single_waiter = {
'acceptors': [
{'state': 'success', 'matcher': unknown_type,
'expected': 'foo'}
]
}
single_waiter.update(self.boiler_plate_config)
config = SingleWaiterConfig(single_waiter)
with self.assertRaises(WaiterConfigError):
config.acceptors
def test_single_waiter_supports_path_all(self):
matches = self.create_acceptor_function(
for_config={'state': 'success', 'matcher': 'pathAll',
'argument': 'Tables[].State', 'expected': 'GOOD'})
self.assertTrue(
matches({'Tables': [{"State": "GOOD"}]}))
self.assertTrue(
matches({'Tables': [{"State": "GOOD"}, {"State": "GOOD"}]}))
def test_single_waiter_supports_path_any(self):
matches = self.create_acceptor_function(
for_config={'state': 'failure', 'matcher': 'pathAny',
'argument': 'Tables[].State', 'expected': 'FAIL'})
self.assertTrue(
matches({'Tables': [{"State": "FAIL"}]}))
self.assertTrue(
matches({'Tables': [{"State": "GOOD"}, {"State": "FAIL"}]}))
def test_waiter_handles_error_responses_with_path_matchers(self):
path_any = self.create_acceptor_function(
for_config={'state': 'success', 'matcher': 'pathAny',
'argument': 'length(Tables) > `0`',
'expected': True})
path_all = self.create_acceptor_function(
for_config={'state': 'success', 'matcher': 'pathAll',
'argument': 'length(Tables) > `0`',
'expected': True})
path = self.create_acceptor_function(
for_config={'state': 'success', 'matcher': 'path',
'argument': 'length(Tables) > `0`',
'expected': True})
self.assertFalse(path_any({'Error': {'Code': 'DoesNotExist'}}))
self.assertFalse(path_all({'Error': {'Code': 'DoesNotExist'}}))
self.assertFalse(path({'Error': {'Code': 'DoesNotExist'}}))
def test_single_waiter_does_not_match_path_all(self):
matches = self.create_acceptor_function(
for_config={'state': 'success', 'matcher': 'pathAll',
'argument': 'Tables[].State', 'expected': 'GOOD'})
self.assertFalse(
matches({'Tables': [{"State": "GOOD"}, {"State": "BAD"}]}))
self.assertFalse(
matches({'Tables': [{"State": "BAD"}, {"State": "GOOD"}]}))
self.assertFalse(
matches({'Tables': [{"State": "BAD"}, {"State": "BAD"}]}))
self.assertFalse(
matches({'Tables': []}))
self.assertFalse(
matches({'Tables': [{"State": "BAD"},
{"State": "BAD"},
{"State": "BAD"},
{"State": "BAD"}]}))
def test_path_all_missing_field(self):
matches = self.create_acceptor_function(
for_config={'state': 'success', 'matcher': 'pathAll',
'argument': 'Tables[].State', 'expected': 'GOOD'})
self.assertFalse(
matches({'Tables': [{"NotState": "GOOD"}, {"NotState": "BAD"}]}))
def test_path_all_matcher_does_not_receive_list(self):
matches = self.create_acceptor_function(
for_config={'state': 'success', 'matcher': 'pathAll',
'argument': 'Tables[].State', 'expected': 'GOOD'})
self.assertFalse(
matches({"NotTables": []}))
def test_single_waiter_supports_all_three_states(self):
single_waiter = {
'acceptors': [
{'state': 'success', 'matcher': 'error',
'expected': 'DoesNotExistError'},
{'state': 'success', 'matcher': 'status',
'expected': 200},
{'state': 'success', 'matcher': 'path',
'argument': 'Foo.Bar', 'expected': 'baz'},
],
}
single_waiter.update(self.boiler_plate_config)
config = SingleWaiterConfig(single_waiter)
acceptors = config.acceptors
# Each acceptors should be able to handle not matching
# any type of response.
matches_nothing = {}
self.assertFalse(acceptors[0].matcher_func(matches_nothing))
self.assertFalse(acceptors[1].matcher_func(matches_nothing))
self.assertFalse(acceptors[2].matcher_func(matches_nothing))
class TestWaitersObjects(unittest.TestCase):
def setUp(self):
pass
def client_responses_are(self, *responses, **kwargs):
operation_method = kwargs['for_operation']
operation_method.side_effect = responses
return operation_method
def create_waiter_config(self, operation='MyOperation',
delay=0, max_attempts=3,
acceptors=None):
if acceptors is None:
# Create some arbitrary acceptor that will never match.
acceptors = [{'state': 'success', 'matcher': 'status',
'expected': 1000}]
waiter_config = {
'operation': operation,
'delay': delay,
'maxAttempts': max_attempts,
'acceptors': acceptors
}
config = SingleWaiterConfig(waiter_config)
return config
def test_waiter_waits_until_acceptor_matches(self):
config = self.create_waiter_config(
max_attempts=3,
acceptors=[{'state': 'success', 'matcher': 'path',
'argument': 'Foo', 'expected': 'SUCCESS'}])
# Simulate the client having two calls that don't
# match followed by a third call that matches the
# acceptor.
operation_method = mock.Mock()
waiter = Waiter('MyWaiter', config, operation_method)
self.client_responses_are(
{'Foo': 'FAILURE'},
{'Foo': 'FAILURE'},
{'Foo': 'SUCCESS'},
for_operation=operation_method
)
waiter.wait()
self.assertEqual(operation_method.call_count, 3)
def test_waiter_never_matches(self):
# Verify that a matcher will fail after max_attempts
# is exceeded.
config = self.create_waiter_config(max_attempts=3)
operation_method = mock.Mock()
self.client_responses_are(
{'Foo': 'FAILURE'},
{'Foo': 'FAILURE'},
{'Foo': 'FAILURE'},
for_operation=operation_method
)
waiter = Waiter('MyWaiter', config, operation_method)
with self.assertRaises(WaiterError):
waiter.wait()
def test_unspecified_errors_stops_waiter(self):
# If a waiter receives an error response, then the
# waiter immediately stops.
config = self.create_waiter_config()
operation_method = mock.Mock()
self.client_responses_are(
# This is an unknown error that's not called out
# in any of the waiter config, so when the
# waiter encounters this response it will transition
# to the failure state.
{'Error': {'Code': 'UnknownError', 'Message': 'bad error'}},
for_operation=operation_method
)
waiter = Waiter('MyWaiter', config, operation_method)
with self.assertRaises(WaiterError):
waiter.wait()
def test_last_response_available_on_waiter_error(self):
last_response = {'Error': {'Code': 'UnknownError', 'Message': 'bad error'}}
config = self.create_waiter_config()
operation_method = mock.Mock()
self.client_responses_are(last_response,
for_operation=operation_method)
waiter = Waiter('MyWaiter', config, operation_method)
with self.assertRaises(WaiterError) as e:
waiter.wait()
self.assertEqual(e.exception.last_response, last_response)
def test_unspecified_errors_propagate_error_code(self):
# If a waiter receives an error response, then the
# waiter should pass along the error code
config = self.create_waiter_config()
operation_method = mock.Mock()
error_code = 'error_message'
error_message = 'error_message'
self.client_responses_are(
# This is an unknown error that's not called out
# in any of the waiter config, so when the
# waiter encounters this response it will transition
# to the failure state.
{'Error': {'Code': error_code, 'Message': error_message}},
for_operation=operation_method
)
waiter = Waiter('MyWaiter', config, operation_method)
with self.assertRaisesRegexp(WaiterError, error_message):
waiter.wait()
def test_waiter_transitions_to_failure_state(self):
acceptors = [
# A success state that will never be hit.
{'state': 'success', 'matcher': 'status', 'expected': 1000},
{'state': 'failure', 'matcher': 'error', 'expected': 'FailError'},
]
config = self.create_waiter_config(acceptors=acceptors)
operation_method = mock.Mock()
self.client_responses_are(
{'Nothing': 'foo'},
# And on the second attempt, a FailError is seen, which
# causes the waiter to fail fast.
{'Error': {'Code': 'FailError', 'Message': 'foo'}},
{'WillNeverGetCalled': True},
for_operation=operation_method
)
waiter = Waiter('MyWaiter', config, operation_method)
with self.assertRaises(WaiterError):
waiter.wait()
# Not only should we raise an exception, but we should have
# only called the operation_method twice because the second
# response triggered a fast fail.
self.assertEqual(operation_method.call_count, 2)
def test_waiter_handles_retry_state(self):
acceptor_with_retry_state = [
{'state': 'success', 'matcher': 'status', 'expected': 200},
{'state': 'retry', 'matcher': 'error', 'expected': 'RetryMe'},
]
config = self.create_waiter_config(
acceptors=acceptor_with_retry_state)
operation_method = mock.Mock()
self.client_responses_are(
{'Nothing': 'foo'},
{'Error': {'Code': 'RetryMe', 'Message': 'foo'}},
{'Success': True,
'ResponseMetadata': {'HTTPStatusCode': 200}},
{'NeverCalled': True},
for_operation=operation_method
)
waiter = Waiter('MyWaiter', config, operation_method)
waiter.wait()
self.assertEqual(operation_method.call_count, 3)
def test_waiter_transitions_to_retry_but_max_attempts_exceeded(self):
acceptors = [
{'state': 'success', 'matcher': 'status', 'expected': 200},
{'state': 'retry', 'matcher': 'error', 'expected': 'RetryMe'},
]
config = self.create_waiter_config(acceptors=acceptors)
operation_method = mock.Mock()
self.client_responses_are(
{'Success': False},
{'Error': {'Code': 'RetryMe', 'Message': 'foo'}},
{'Success': False},
{'Success': False},
for_operation=operation_method
)
waiter = Waiter('MyWaiter', config, operation_method)
with self.assertRaises(WaiterError):
waiter.wait()
def test_kwargs_are_passed_through(self):
acceptors = [
{'state': 'success', 'matcher': 'error', 'expected': 'MyError'},
]
config = self.create_waiter_config(acceptors=acceptors)
operation_method = mock.Mock()
self.client_responses_are(
{'Error': {'Code': 'MyError'}},
for_operation=operation_method)
waiter = Waiter('MyWaiter', config, operation_method)
waiter.wait(Foo='foo', Bar='bar', Baz='baz')
operation_method.assert_called_with(Foo='foo', Bar='bar',
Baz='baz')
@mock.patch('time.sleep')
def test_waiter_honors_delay_time_between_retries(self, sleep_mock):
delay_time = 5
config = self.create_waiter_config(delay=delay_time)
operation_method = mock.Mock()
self.client_responses_are(
# This is an unknown error that's not called out
# in any of the waiter config, so when the
# waiter encounters this response it will transition
# to the failure state.
{'Success': False},
{'Success': False},
{'Success': False},
for_operation=operation_method
)
waiter = Waiter('MyWaiter', config, operation_method)
with self.assertRaises(WaiterError):
waiter.wait()
# We attempt three times, which means we need to sleep
# twice, once before each subsequent request.
self.assertEqual(sleep_mock.call_count, 2)
sleep_mock.assert_called_with(delay_time)
@mock.patch('time.sleep')
def test_waiter_invocation_config_honors_delay(self, sleep_mock):
config = self.create_waiter_config()
operation_method = mock.Mock()
self.client_responses_are(
{'Success': False},
{'Success': False},
{'Success': False},
for_operation=operation_method
)
waiter = Waiter('MyWaiter', config, operation_method)
custom_delay = 3
with self.assertRaises(WaiterError):
waiter.wait(WaiterConfig={'Delay': custom_delay})
# We attempt three times, which means we need to sleep
# twice, once before each subsequent request.
self.assertEqual(sleep_mock.call_count, 2)
sleep_mock.assert_called_with(custom_delay)
def test_waiter_invocation_config_honors_max_attempts(self):
config = self.create_waiter_config()
operation_method = mock.Mock()
self.client_responses_are(
{'Success': False},
{'Success': False},
for_operation=operation_method
)
waiter = Waiter('MyWaiter', config, operation_method)
custom_max = 2
with self.assertRaises(WaiterError):
waiter.wait(WaiterConfig={'MaxAttempts': custom_max})
self.assertEqual(operation_method.call_count, 2)
class TestCreateWaiter(unittest.TestCase):
def setUp(self):
self.waiter_config = {
'version': 2,
'waiters': {
'WaiterName': {
'operation': 'Foo',
'delay': 1,
'maxAttempts': 1,
'acceptors': [],
},
},
}
self.waiter_model = WaiterModel(self.waiter_config)
self.service_json_model = {
'metadata': {
'serviceFullName': 'Amazon MyService'
},
'operations': {
'Foo': {
'name': 'Foo',
'input': {'shape': 'FooInputOutput'},
'output': {'shape': 'FooInputOutput'}
}
},
'shapes': {
'FooInputOutput': {
'type': 'structure',
'members': {
'bar': {
'shape': 'String',
'documentation': 'Documents bar'
}
}
},
'String': {
'type': 'string'
}
}
}
self.service_model = ServiceModel(self.service_json_model, 'myservice')
self.client = mock.Mock()
self.client.meta.service_model = self.service_model
def test_can_create_waiter_from_client(self):
waiter_name = 'WaiterName'
waiter = create_waiter_with_client(
waiter_name, self.waiter_model, self.client)
self.assertIsInstance(waiter, Waiter)
def test_waiter_class_name(self):
waiter_name = 'WaiterName'
waiter = create_waiter_with_client(
waiter_name, self.waiter_model, self.client)
self.assertEqual(
waiter.__class__.__name__,
'MyService.Waiter.WaiterName'
)
def test_waiter_help_documentation(self):
waiter_name = 'WaiterName'
waiter = create_waiter_with_client(
waiter_name, self.waiter_model, self.client)
with mock.patch('sys.stdout', six.StringIO()) as mock_stdout:
help(waiter.wait)
content = mock_stdout.getvalue()
lines = [
(' Polls :py:meth:`MyService.Client.foo` every 1 '
'seconds until a successful state is reached. An error '
'is returned after 1 failed checks.'),
' **Request Syntax** ',
' ::',
' waiter.wait(',
" bar='string'",
' )',
' :type bar: string',
' :param bar: Documents bar',
' :returns: None',
]
for line in lines:
self.assertIn(line, content)
class TestOperationMethods(unittest.TestCase):
def test_normalized_op_method_makes_call(self):
client_method = mock.Mock()
op = NormalizedOperationMethod(client_method)
op(Foo='a', Bar='b')
client_method.assert_called_with(Foo='a', Bar='b')
def test_normalized_op_returns_error_response(self):
# Client objects normally throw exceptions when an error
# occurs, but we need to return the parsed error response.
client_method = mock.Mock()
op = NormalizedOperationMethod(client_method)
parsed_response = {
'Error': {'Code': 'Foo', 'Message': 'bar'}
}
exception = ClientError(parsed_response, 'OperationName')
client_method.side_effect = exception
actual_response = op(Foo='a', Bar='b')
self.assertEqual(actual_response, parsed_response)
class ServiceWaiterFunctionalTest(BaseEnvVar):
"""
This class is used as a base class if you want to functionally test the
waiters for a specific service.
"""
def setUp(self):
super(ServiceWaiterFunctionalTest, self).setUp()
self.data_path = os.path.join(
os.path.dirname(botocore.__file__), 'data')
self.environ['AWS_DATA_PATH'] = self.data_path
self.loader = Loader([self.data_path])
def get_waiter_model(self, service, api_version=None):
"""Get the waiter model for the service."""
with mock.patch('botocore.loaders.Loader.list_available_services',
return_value=[service]):
return WaiterModel(self.loader.load_service_model(
service, type_name='waiters-2', api_version=api_version))
def get_service_model(self, service, api_version=None):
"""Get the service model for the service."""
with mock.patch('botocore.loaders.Loader.list_available_services',
return_value=[service]):
return ServiceModel(
self.loader.load_service_model(
service, type_name='service-2', api_version=api_version),
service_name=service
)
class CloudFrontWaitersTest(ServiceWaiterFunctionalTest):
def setUp(self):
super(CloudFrontWaitersTest, self).setUp()
self.client = mock.Mock()
self.service = 'cloudfront'
self.old_api_versions = ['2014-05-31']
def assert_distribution_deployed_call_count(self, api_version=None):
waiter_name = 'DistributionDeployed'
waiter_model = self.get_waiter_model(self.service, api_version)
self.client.meta.service_model = self.get_service_model(
self.service, api_version)
self.client.get_distribution.side_effect = [
{'Distribution': {'Status': 'Deployed'}}
]
waiter = create_waiter_with_client(waiter_name, waiter_model,
self.client)
waiter.wait()
self.assertEqual(self.client.get_distribution.call_count, 1)
def assert_invalidation_completed_call_count(self, api_version=None):
waiter_name = 'InvalidationCompleted'
waiter_model = self.get_waiter_model(self.service, api_version)
self.client.meta.service_model = self.get_service_model(
self.service, api_version)
self.client.get_invalidation.side_effect = [
{'Invalidation': {'Status': 'Completed'}}
]
waiter = create_waiter_with_client(waiter_name, waiter_model,
self.client)
waiter.wait()
self.assertEqual(self.client.get_invalidation.call_count, 1)
def assert_streaming_distribution_deployed_call_count(
self, api_version=None):
waiter_name = 'StreamingDistributionDeployed'
waiter_model = self.get_waiter_model(self.service, api_version)
self.client.meta.service_model = self.get_service_model(
self.service, api_version)
self.client.get_streaming_distribution.side_effect = [
{'StreamingDistribution': {'Status': 'Deployed'}}
]
waiter = create_waiter_with_client(waiter_name, waiter_model,
self.client)
waiter.wait()
self.assertEqual(self.client.get_streaming_distribution.call_count, 1)
def test_distribution_deployed(self):
# Test the latest version.
self.assert_distribution_deployed_call_count()
self.client.reset_mock()
# Test previous api versions.
for api_version in self.old_api_versions:
self.assert_distribution_deployed_call_count(api_version)
self.client.reset_mock()
def test_invalidation_completed(self):
# Test the latest version.
self.assert_invalidation_completed_call_count()
self.client.reset_mock()
# Test previous api versions.
for api_version in self.old_api_versions:
self.assert_invalidation_completed_call_count(api_version)
self.client.reset_mock()
def test_streaming_distribution_deployed(self):
# Test the latest version.
self.assert_streaming_distribution_deployed_call_count()
self.client.reset_mock()
# Test previous api versions.
for api_version in self.old_api_versions:
self.assert_streaming_distribution_deployed_call_count(api_version)
self.client.reset_mock()
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