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# Copyright DataStax, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License 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.
from cassandra.cluster import ContinuousPagingOptions
from tests.integration import greaterthanorequaldse68
from tests.integration.advanced.graph import GraphUnitTestCase, CoreGraphSchema, GraphTestConfiguration
@greaterthanorequaldse68
@GraphTestConfiguration.generate_tests(schema=CoreGraphSchema)
class GraphPagingTest(GraphUnitTestCase):
def _setup_data(self, schema, graphson):
self.execute_graph("schema.vertexLabel('person').ifNotExists().partitionBy('name', Text).property('age', Int).create();", graphson)
for i in range(100):
self.execute_graph("g.addV('person').property('name', 'batman-{}')".format(i), graphson)
def _test_cont_paging_is_enabled_by_default(self, schema, graphson):
"""
Test that graph paging is automatically enabled with a >=6.8 cluster.
@jira_ticket PYTHON-1045
@expected_result the response future has a continuous_paging_session since graph paging is enabled
@test_category dse graph
"""
ep = self.get_execution_profile(graphson)
self._setup_data(schema, graphson)
rf = self.session.execute_graph_async("g.V()", execution_profile=ep)
results = list(rf.result())
self.assertIsNotNone(rf._continuous_paging_session)
self.assertEqual(len(results), 100)
def _test_cont_paging_can_be_disabled(self, schema, graphson):
"""
Test that graph paging can be disabled.
@jira_ticket PYTHON-1045
@expected_result the response future doesn't have a continuous_paging_session since graph paging is disabled
@test_category dse graph
"""
ep = self.get_execution_profile(graphson)
new_ep = self.session.execution_profile_clone_update(ep, continuous_paging_options=None)
self._setup_data(schema, graphson)
rf = self.session.execute_graph_async("g.V()", execution_profile=new_ep)
results = list(rf.result())
self.assertIsNone(rf._continuous_paging_session)
self.assertEqual(len(results), 100)
def _test_cont_paging_with_custom_options(self, schema, graphson):
"""
Test that we can specify custom paging options.
@jira_ticket PYTHON-1045
@expected_result we get only the desired number of results
@test_category dse graph
"""
ep = self.get_execution_profile(graphson)
new_ep = self.session.execution_profile_clone_update(
ep, continuous_paging_options=ContinuousPagingOptions(max_pages=1))
self._setup_data(schema, graphson)
self.session.default_fetch_size = 10
results = list(self.session.execute_graph("g.V()", execution_profile=new_ep))
self.assertEqual(len(results), 10)
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