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# The MIT License (MIT)
# Copyright (c) Microsoft Corporation. All rights reserved.
import unittest
import uuid
import pytest
import azure.cosmos.cosmos_client as cosmos_client
import azure.cosmos.exceptions as exceptions
import test_config
from azure.cosmos import _retry_utility, PartitionKey
from azure.cosmos._location_cache import RegionalRoutingContext, EndpointOperationType
COLLECTION = "created_collection"
@pytest.fixture(scope="class")
def setup():
if (TestTimeoutRetryPolicy.masterKey == '[YOUR_KEY_HERE]' or
TestTimeoutRetryPolicy.host == '[YOUR_ENDPOINT_HERE]'):
raise Exception(
"You must specify your Azure Cosmos account values for "
"'masterKey' and 'host' at the top of this class to run the "
"tests.")
client = cosmos_client.CosmosClient(TestTimeoutRetryPolicy.host, TestTimeoutRetryPolicy.masterKey, consistency_level="Session",
connection_policy=TestTimeoutRetryPolicy.connectionPolicy)
created_database = client.get_database_client(TestTimeoutRetryPolicy.TEST_DATABASE_ID)
created_collection = created_database.create_container(TestTimeoutRetryPolicy.TEST_CONTAINER_SINGLE_PARTITION_ID,
partition_key=PartitionKey("/pk"))
yield {
COLLECTION: created_collection
}
created_database.delete_container(TestTimeoutRetryPolicy.TEST_CONTAINER_SINGLE_PARTITION_ID)
def error_codes():
return [408, 500, 502, 503]
@pytest.mark.cosmosEmulator
@pytest.mark.unittest
@pytest.mark.usefixtures("setup")
class TestTimeoutRetryPolicy:
host = test_config.TestConfig.host
masterKey = test_config.TestConfig.masterKey
connectionPolicy = test_config.TestConfig.connectionPolicy
TEST_DATABASE_ID = test_config.TestConfig.TEST_DATABASE_ID
TEST_CONTAINER_SINGLE_PARTITION_ID = "test-timeout-retry-policy-container-" + str(uuid.uuid4())
@pytest.mark.parametrize("error_code", error_codes())
def test_timeout_failover_retry_policy_for_read_success(self, setup, error_code):
document_definition = {'id': 'failoverDoc-' + str(uuid.uuid4()),
'pk': 'pk',
'name': 'sample document',
'key': 'value'}
created_document = setup[COLLECTION].create_item(body=document_definition)
self.original_execute_function = _retry_utility.ExecuteFunction
try:
# should retry once and then succeed
mf = self.MockExecuteFunction(self.original_execute_function, 1, error_code)
_retry_utility.ExecuteFunction = mf
doc = setup[COLLECTION].read_item(item=created_document['id'],
partition_key=created_document['pk'])
assert doc == created_document
finally:
_retry_utility.ExecuteFunction = self.original_execute_function
@pytest.mark.parametrize("error_code", error_codes())
def test_timeout_failover_retry_policy_for_read_failure(self, setup, error_code):
document_definition = {'id': 'failoverDoc-' + str(uuid.uuid4()),
'pk': 'pk',
'name': 'sample document',
'key': 'value'}
created_document = setup[COLLECTION].create_item(body=document_definition)
self.original_execute_function = _retry_utility.ExecuteFunction
try:
# should retry once and then fail
mf = self.MockExecuteFunction(self.original_execute_function, 2, error_code)
_retry_utility.ExecuteFunction = mf
setup[COLLECTION].read_item(item=created_document['id'],
partition_key=created_document['pk'])
pytest.fail("Exception was not raised.")
except exceptions.CosmosHttpResponseError as err:
assert err.status_code == error_code
finally:
_retry_utility.ExecuteFunction = self.original_execute_function
@pytest.mark.parametrize("error_code", error_codes())
def test_timeout_failover_retry_policy_for_write_failure(self, setup, error_code):
document_definition = {'id': 'failoverDoc' + str(uuid.uuid4()),
'pk': 'pk',
'name': 'sample document',
'key': 'value'}
self.original_execute_function = _retry_utility.ExecuteFunction
try:
# timeouts should fail immediately for writes
mf = self.MockExecuteFunction(self.original_execute_function,0, error_code)
_retry_utility.ExecuteFunction = mf
try:
setup[COLLECTION].create_item(body=document_definition)
pytest.fail("Exception was not raised.")
except exceptions.CosmosHttpResponseError as err:
assert err.status_code == error_code
finally:
_retry_utility.ExecuteFunction = self.original_execute_function
@pytest.mark.parametrize("error_code", error_codes())
def test_cross_region_retry(self, setup, error_code):
mock_client = cosmos_client.CosmosClient(self.host, self.masterKey)
db = mock_client.get_database_client(self.TEST_DATABASE_ID)
container = db.get_container_client(self.TEST_CONTAINER_SINGLE_PARTITION_ID)
document_definition = {'id': 'failoverDoc' + str(uuid.uuid4()),
'pk': 'pk',
'name': 'sample document',
'key': 'value'}
created_document = container.create_item(body=document_definition)
self.original_execute_function = _retry_utility.ExecuteFunction
original_location_cache = mock_client.client_connection._global_endpoint_manager.location_cache
fake_endpoint = "other-region"
region_1 = "East US"
region_2 = "West US"
regional_routing_context = RegionalRoutingContext(self.host, self.host)
regional_routing_context_2 = RegionalRoutingContext(fake_endpoint, fake_endpoint)
original_location_cache.account_read_locations = [region_1, region_2]
original_location_cache.account_read_regional_routing_contexts_by_location = {region_1: regional_routing_context,
region_2: regional_routing_context_2
}
original_location_cache.read_regional_routing_contexts = [regional_routing_context, regional_routing_context_2]
try:
# should retry once and then succeed
mf = self.MockExecuteFunctionCrossRegion(self.original_execute_function, error_code, fake_endpoint)
_retry_utility.ExecuteFunction = mf
container.read_item(item=created_document['id'],
partition_key=created_document['pk'])
finally:
_retry_utility.ExecuteFunction = self.original_execute_function
class MockExecuteFunction(object):
def __init__(self, org_func, num_exceptions, status_code):
self.org_func = org_func
self.counter = 0
self.num_exceptions = num_exceptions
self.status_code = status_code
def __call__(self, func, *args, **kwargs):
if self.counter != 0 and self.counter >= self.num_exceptions:
return self.org_func(func, *args, **kwargs)
else:
self.counter += 1
raise exceptions.CosmosHttpResponseError(
status_code=self.status_code,
message="Some Exception",
response=test_config.FakeResponse({}))
class MockExecuteFunctionCrossRegion(object):
def __init__(self, org_func, status_code, location_endpoint_to_route):
self.org_func = org_func
self.counter = 0
self.status_code = status_code
self.location_endpoint_to_route = location_endpoint_to_route
def __call__(self, func, *args, **kwargs):
if self.counter == 1:
assert args[1].location_endpoint_to_route == self.location_endpoint_to_route
args[1].location_endpoint_to_route = test_config.TestConfig.host
return self.org_func(func, *args, **kwargs)
else:
self.counter += 1
raise exceptions.CosmosHttpResponseError(
status_code=self.status_code,
message="Some Exception",
response=test_config.FakeResponse({}))
if __name__ == '__main__':
unittest.main()
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