119 lines
4.4 KiB
Python
119 lines
4.4 KiB
Python
# Copyright 2015-present MongoDB, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Test the read_concern module."""
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from test import IntegrationTest, client_context
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from test.utils import OvertCommandListener, rs_or_single_client, single_client
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from bson.son import SON
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from pymongo.errors import OperationFailure
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from pymongo.read_concern import ReadConcern
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class TestReadConcern(IntegrationTest):
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listener: OvertCommandListener
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@classmethod
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@client_context.require_connection
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def setUpClass(cls):
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super(TestReadConcern, cls).setUpClass()
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cls.listener = OvertCommandListener()
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cls.client = single_client(event_listeners=[cls.listener])
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cls.db = cls.client.pymongo_test
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client_context.client.pymongo_test.create_collection("coll")
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@classmethod
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def tearDownClass(cls):
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cls.client.close()
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client_context.client.pymongo_test.drop_collection("coll")
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super(TestReadConcern, cls).tearDownClass()
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def tearDown(self):
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self.listener.results.clear()
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super(TestReadConcern, self).tearDown()
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def test_read_concern(self):
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rc = ReadConcern()
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self.assertIsNone(rc.level)
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self.assertTrue(rc.ok_for_legacy)
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rc = ReadConcern("majority")
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self.assertEqual("majority", rc.level)
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self.assertFalse(rc.ok_for_legacy)
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rc = ReadConcern("local")
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self.assertEqual("local", rc.level)
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self.assertTrue(rc.ok_for_legacy)
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self.assertRaises(TypeError, ReadConcern, 42)
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def test_read_concern_uri(self):
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uri = "mongodb://%s/?readConcernLevel=majority" % (client_context.pair,)
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client = rs_or_single_client(uri, connect=False)
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self.assertEqual(ReadConcern("majority"), client.read_concern)
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def test_invalid_read_concern(self):
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coll = self.db.get_collection("coll", read_concern=ReadConcern("unknown"))
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# We rely on the server to validate read concern.
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with self.assertRaises(OperationFailure):
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coll.find_one()
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def test_find_command(self):
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# readConcern not sent in command if not specified.
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coll = self.db.coll
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tuple(coll.find({"field": "value"}))
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self.assertNotIn("readConcern", self.listener.results["started"][0].command)
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self.listener.results.clear()
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# Explicitly set readConcern to 'local'.
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coll = self.db.get_collection("coll", read_concern=ReadConcern("local"))
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tuple(coll.find({"field": "value"}))
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self.assertEqualCommand(
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SON(
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[
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("find", "coll"),
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("filter", {"field": "value"}),
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("readConcern", {"level": "local"}),
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]
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),
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self.listener.results["started"][0].command,
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)
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def test_command_cursor(self):
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# readConcern not sent in command if not specified.
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coll = self.db.coll
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tuple(coll.aggregate([{"$match": {"field": "value"}}]))
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self.assertNotIn("readConcern", self.listener.results["started"][0].command)
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self.listener.results.clear()
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# Explicitly set readConcern to 'local'.
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coll = self.db.get_collection("coll", read_concern=ReadConcern("local"))
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tuple(coll.aggregate([{"$match": {"field": "value"}}]))
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self.assertEqual(
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{"level": "local"}, self.listener.results["started"][0].command["readConcern"]
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)
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def test_aggregate_out(self):
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coll = self.db.get_collection("coll", read_concern=ReadConcern("local"))
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tuple(coll.aggregate([{"$match": {"field": "value"}}, {"$out": "output_collection"}]))
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# Aggregate with $out supports readConcern MongoDB 4.2 onwards.
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if client_context.version >= (4, 1):
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self.assertIn("readConcern", self.listener.results["started"][0].command)
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else:
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self.assertNotIn("readConcern", self.listener.results["started"][0].command)
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