249 lines
8.4 KiB
Python
249 lines
8.4 KiB
Python
try:
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import unittest2 as unittest
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except ImportError:
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import unittest # noqa
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import cassandra
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from cassandra.query import SimpleStatement
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from cassandra.io.asyncorereactor import AsyncoreConnection
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from cassandra.policies import RoundRobinPolicy, ExponentialReconnectionPolicy, RetryPolicy, SimpleConvictionPolicy, HostDistance
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from cassandra.cluster import Cluster, NoHostAvailable
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class ClusterTests(unittest.TestCase):
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def test_basic(self):
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"""
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Test basic connection and usage
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"""
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cluster = Cluster()
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session = cluster.connect()
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result = session.execute(
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"""
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CREATE KEYSPACE clustertests
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WITH replication = {'class': 'SimpleStrategy', 'replication_factor': '1'}
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""")
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self.assertEquals(None, result)
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result = session.execute(
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"""
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CREATE TABLE clustertests.cf0 (
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a text,
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b text,
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c text,
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PRIMARY KEY (a, b)
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)
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""")
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self.assertEquals(None, result)
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result = session.execute(
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"""
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INSERT INTO clustertests.cf0 (a, b, c) VALUES ('a', 'b', 'c')
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""")
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self.assertEquals(None, result)
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result = session.execute("SELECT * FROM clustertests.cf0")
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self.assertEquals([('a', 'b', 'c')], result)
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cluster.shutdown()
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def test_connect_on_keyspace(self):
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"""
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Ensure clusters that connect on a keyspace, do
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"""
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cluster = Cluster()
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session = cluster.connect()
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result = session.execute(
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"""
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INSERT INTO test3rf.test (k, v) VALUES (8889, 8889)
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""")
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self.assertEquals(None, result)
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result = session.execute("SELECT * FROM test3rf.test")
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self.assertEquals([(8889, 8889)], result)
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# test_connect_on_keyspace
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session2 = cluster.connect('test3rf')
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result2 = session2.execute("SELECT * FROM test")
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self.assertEquals(result, result2)
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def test_default_connections(self):
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"""
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Ensure errors are not thrown when using non-default policies
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"""
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cluster = Cluster(
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load_balancing_policy=RoundRobinPolicy(),
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reconnection_policy=ExponentialReconnectionPolicy(1.0, 600.0),
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default_retry_policy=RetryPolicy(),
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conviction_policy_factory=SimpleConvictionPolicy,
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connection_class=AsyncoreConnection
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)
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def test_double_shutdown(self):
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"""
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Ensure that a cluster can be shutdown twice, without error
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"""
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cluster = Cluster()
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cluster.shutdown()
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try:
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cluster.shutdown()
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self.fail('A double cluster.shutdown() should throw an error.')
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except Exception as e:
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self.assertEqual(e.message, 'The Cluster was already shutdown')
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def test_connect_to_already_shutdown_cluster(self):
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"""
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Ensure you cannot connect to a cluster that's been shutdown
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"""
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cluster = Cluster()
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cluster.shutdown()
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self.assertRaises(Exception, cluster.connect)
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def test_auth_provider_is_callable(self):
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"""
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Ensure that auth_providers are always callable
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"""
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self.assertRaises(ValueError, Cluster, auth_provider=1)
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def test_conviction_policy_factory_is_callable(self):
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"""
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Ensure that conviction_policy_factory are always callable
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"""
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self.assertRaises(ValueError, Cluster, conviction_policy_factory=1)
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def test_connect_to_bad_hosts(self):
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"""
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Ensure that a NoHostAvailable Exception is thrown
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when a cluster cannot connect to given hosts
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"""
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cluster = Cluster(['127.1.2.9', '127.1.2.10'])
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self.assertRaises(NoHostAvailable, cluster.connect)
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def test_cluster_settings(self):
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"""
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Test connection setting getters and setters
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"""
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cluster = Cluster()
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min_requests_per_connection = cluster.get_min_requests_per_connection(HostDistance.LOCAL)
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self.assertEqual(cassandra.cluster.DEFAULT_MIN_REQUESTS, min_requests_per_connection)
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cluster.set_min_requests_per_connection(HostDistance.LOCAL, min_requests_per_connection + 1)
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self.assertEqual(cluster.get_min_requests_per_connection(HostDistance.LOCAL), min_requests_per_connection + 1)
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max_requests_per_connection = cluster.get_max_requests_per_connection(HostDistance.LOCAL)
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self.assertEqual(cassandra.cluster.DEFAULT_MAX_REQUESTS, max_requests_per_connection)
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cluster.set_max_requests_per_connection(HostDistance.LOCAL, max_requests_per_connection + 1)
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self.assertEqual(cluster.get_max_requests_per_connection(HostDistance.LOCAL), max_requests_per_connection + 1)
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core_connections_per_host = cluster.get_core_connections_per_host(HostDistance.LOCAL)
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self.assertEqual(cassandra.cluster.DEFAULT_MIN_CONNECTIONS_PER_LOCAL_HOST, core_connections_per_host)
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cluster.set_core_connections_per_host(HostDistance.LOCAL, core_connections_per_host + 1)
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self.assertEqual(cluster.get_core_connections_per_host(HostDistance.LOCAL), core_connections_per_host + 1)
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max_connections_per_host = cluster.get_max_connections_per_host(HostDistance.LOCAL)
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self.assertEqual(cassandra.cluster.DEFAULT_MAX_CONNECTIONS_PER_LOCAL_HOST, max_connections_per_host)
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cluster.set_max_connections_per_host(HostDistance.LOCAL, max_connections_per_host + 1)
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self.assertEqual(cluster.get_max_connections_per_host(HostDistance.LOCAL), max_connections_per_host + 1)
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def test_submit_schema_refresh(self):
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"""
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Ensure new new schema is refreshed after submit_schema_refresh()
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"""
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cluster = Cluster()
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cluster.connect()
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self.assertNotIn("newkeyspace", cluster.metadata.keyspaces)
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other_cluster = Cluster()
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session = other_cluster.connect()
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session.execute(
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"""
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CREATE KEYSPACE newkeyspace
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WITH replication = {'class': 'SimpleStrategy', 'replication_factor': '1'}
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""")
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future = cluster.submit_schema_refresh()
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future.result()
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self.assertIn("newkeyspace", cluster.metadata.keyspaces)
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def test_on_down_and_up(self):
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"""
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Test on_down and on_up handling
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"""
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cluster = Cluster()
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session = cluster.connect()
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host = cluster.metadata.all_hosts()[0]
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host.monitor.signal_connection_failure(None)
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cluster.on_down(host)
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self.assertNotIn(host, session._pools)
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host_reconnector = host._reconnection_handler
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self.assertNotEqual(None, host_reconnector)
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host.monitor.is_up = True
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cluster.on_up(host)
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self.assertEqual(None, host._reconnection_handler)
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self.assertTrue(host_reconnector._cancelled)
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self.assertIn(host, session._pools)
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def test_trace(self):
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"""
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Ensure trace can be requested for async and non-async queries
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"""
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cluster = Cluster()
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session = cluster.connect()
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self.assertRaises(TypeError, session.execute, "SELECT * FROM system.local", trace=True)
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query = "SELECT * FROM system.local"
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statement = SimpleStatement(query)
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session.execute(statement, trace=True)
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self.assertEqual(query, statement.trace.parameters['query'])
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query = "SELECT * FROM system.local"
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statement = SimpleStatement(query)
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session.execute(statement)
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self.assertEqual(None, statement.trace)
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statement2 = SimpleStatement(query)
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future = session.execute_async(statement2, trace=True)
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future.result()
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self.assertEqual(query, future.get_query_trace().parameters['query'])
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statement2 = SimpleStatement(query)
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future = session.execute_async(statement2)
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future.result()
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self.assertEqual(None, future.get_query_trace())
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def test_string_coverage(self):
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"""
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Ensure str(future) returns without error
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"""
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cluster = Cluster()
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session = cluster.connect()
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query = "SELECT * FROM system.local"
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statement = SimpleStatement(query)
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future = session.execute_async(statement)
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self.assertIn(query, str(future))
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future.result()
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self.assertIn(query, str(future))
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self.assertIn('result', str(future))
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