74 lines
2.3 KiB
Python
74 lines
2.3 KiB
Python
# Copyright 2015 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 PyMongo query and read preference with a sharded cluster."""
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import unittest
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from mockupdb import MockupDB, OpMsg, going
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from bson import SON
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from pymongo import MongoClient
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from pymongo.read_preferences import (
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Nearest,
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Primary,
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PrimaryPreferred,
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Secondary,
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SecondaryPreferred,
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)
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class TestQueryAndReadModeSharded(unittest.TestCase):
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def test_query_and_read_mode_sharded_op_msg(self):
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"""Test OP_MSG sends non-primary $readPreference and never $query."""
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server = MockupDB()
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server.autoresponds(
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"ismaster", ismaster=True, msg="isdbgrid", minWireVersion=2, maxWireVersion=6
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)
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server.run()
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self.addCleanup(server.stop)
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client = MongoClient(server.uri)
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self.addCleanup(client.close)
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read_prefs = (
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Primary(),
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SecondaryPreferred(),
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PrimaryPreferred(),
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Secondary(),
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Nearest(),
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SecondaryPreferred([{"tag": "value"}]),
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)
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for query in (
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{"a": 1},
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{"$query": {"a": 1}},
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):
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for pref in read_prefs:
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collection = client.db.get_collection("test", read_preference=pref)
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cursor = collection.find(query.copy())
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with going(next, cursor):
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request = server.receives()
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# Command is not nested in $query.
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expected_cmd = SON([("find", "test"), ("filter", {"a": 1})])
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if pref.mode:
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expected_cmd["$readPreference"] = pref.document
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request.assert_matches(OpMsg(expected_cmd))
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request.replies({"cursor": {"id": 0, "firstBatch": [{}]}})
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if __name__ == "__main__":
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unittest.main()
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