def test_prepared_metadata_generation(self):
"""
Test to validate that result metadata is appropriately populated across protocol version
Result metadata is set once upon the prepare, then re-used. This test ensures that it manifests
it's self the same across multiple protocol versions.
@since 3.6.0
@jira_ticket PYTHON-71
@expected_result result metadata is consistent.
"""
base_line = None
for proto_version in get_supported_protocol_versions():
beta_flag = True if proto_version in ProtocolVersion.BETA_VERSIONS else False
cluster = Cluster(protocol_version=proto_version, allow_beta_protocol_version=beta_flag)
session = cluster.connect()
select_statement = session.prepare("SELECT * FROM system.local")
self.assertNotEqual(select_statement.result_metadata, None)
future = session.execute_async(select_statement)
results = future.result()
if base_line is None:
base_line = results[0]._asdict().keys()
else:
self.assertEqual(base_line, results[0]._asdict().keys())
cluster.shutdown()
def test_prepared_statement(self):
"""
Highlight the difference between Prepared and Bound statements
"""
cluster = Cluster(protocol_version=PROTOCOL_VERSION)
session = cluster.connect()
prepared = session.prepare('INSERT INTO test3rf.test (k, v) VALUES (?, ?)')
prepared.consistency_level = ConsistencyLevel.ONE
self.assertEqual(str(prepared),
'<PreparedStatement query="INSERT INTO test3rf.test (k, v) VALUES (?, ?)", consistency=ONE>')
bound = prepared.bind((1, 2))
self.assertEqual(str(bound),
'<BoundStatement query="INSERT INTO test3rf.test (k, v) VALUES (?, ?)", values=(1, 2), consistency=ONE>')
cluster.shutdown()