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# Copyright 2018-present MongoDB, 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 __future__ import annotations
import copy
import itertools
import unittest
from test import PyMongoTestCase
from typing import Any
import pytest
try:
from mockupdb import CommandBase, MockupDB, going
_HAVE_MOCKUPDB = True
except ImportError:
_HAVE_MOCKUPDB = False
from operations import operations # type: ignore[import]
from pymongo import ReadPreference
from pymongo.common import MIN_SUPPORTED_WIRE_VERSION
from pymongo.read_preferences import (
_MONGOS_MODES,
make_read_preference,
read_pref_mode_from_name,
)
pytestmark = pytest.mark.mockupdb
class OpMsgReadPrefBase(PyMongoTestCase):
single_mongod = False
primary: MockupDB
secondary: MockupDB
@classmethod
def setUpClass(cls):
super().setUpClass()
@classmethod
def add_test(cls, mode, test_name, test):
setattr(cls, test_name, test)
def setup_client(self, read_preference):
client = self.simple_client(self.primary.uri, read_preference=read_preference)
return client
class TestOpMsgMongos(OpMsgReadPrefBase):
@classmethod
def setUpClass(cls):
super().setUpClass()
auto_ismaster = {
"ismaster": True,
"msg": "isdbgrid", # Mongos.
"minWireVersion": 2,
"maxWireVersion": MIN_SUPPORTED_WIRE_VERSION,
}
cls.primary = MockupDB(auto_ismaster=auto_ismaster)
cls.primary.run()
cls.secondary = cls.primary
@classmethod
def tearDownClass(cls):
cls.primary.stop()
super().tearDownClass()
class TestOpMsgReplicaSet(OpMsgReadPrefBase):
@classmethod
def setUpClass(cls):
super().setUpClass()
cls.primary, cls.secondary = MockupDB(), MockupDB()
for server in cls.primary, cls.secondary:
server.run()
hosts = [server.address_string for server in (cls.primary, cls.secondary)]
primary_ismaster = {
"ismaster": True,
"setName": "rs",
"hosts": hosts,
"minWireVersion": 2,
"maxWireVersion": MIN_SUPPORTED_WIRE_VERSION,
}
cls.primary.autoresponds(CommandBase("ismaster"), primary_ismaster)
secondary_ismaster = copy.copy(primary_ismaster)
secondary_ismaster["ismaster"] = False
secondary_ismaster["secondary"] = True
cls.secondary.autoresponds(CommandBase("ismaster"), secondary_ismaster)
@classmethod
def tearDownClass(cls):
for server in cls.primary, cls.secondary:
server.stop()
super().tearDownClass()
@classmethod
def add_test(cls, mode, test_name, test):
# Skip nearest tests since we don't know if we will select the primary
# or secondary.
if mode != "nearest":
setattr(cls, test_name, test)
def setup_client(self, read_preference):
client = self.simple_client(
self.primary.uri, replicaSet="rs", read_preference=read_preference
)
# Run a command on a secondary to discover the topology. This ensures
# that secondaryPreferred commands will select the secondary.
client.admin.command("ismaster", read_preference=ReadPreference.SECONDARY)
return client
class TestOpMsgSingle(OpMsgReadPrefBase):
single_mongod = True
@classmethod
def setUpClass(cls):
super().setUpClass()
auto_ismaster = {
"ismaster": True,
"minWireVersion": 2,
"maxWireVersion": MIN_SUPPORTED_WIRE_VERSION,
}
cls.primary = MockupDB(auto_ismaster=auto_ismaster)
cls.primary.run()
cls.secondary = cls.primary
@classmethod
def tearDownClass(cls):
cls.primary.stop()
super().tearDownClass()
def create_op_msg_read_mode_test(mode, operation):
def test(self):
pref = make_read_preference(read_pref_mode_from_name(mode), tag_sets=None)
client = self.setup_client(read_preference=pref)
expected_pref: Any
if operation.op_type == "always-use-secondary":
expected_server = self.secondary
expected_pref = ReadPreference.SECONDARY
elif operation.op_type == "must-use-primary":
expected_server = self.primary
expected_pref = None
elif operation.op_type == "may-use-secondary":
if mode == "primary":
expected_server = self.primary
expected_pref = None
elif mode == "primaryPreferred":
expected_server = self.primary
expected_pref = pref
else:
expected_server = self.secondary
expected_pref = pref
else:
self.fail("unrecognized op_type %r" % operation.op_type)
# For single mongod we omit the read preference.
if self.single_mongod:
expected_pref = None
with going(operation.function, client):
request = expected_server.receive()
request.reply(operation.reply)
actual_pref = request.doc.get("$readPreference")
if expected_pref:
self.assertEqual(expected_pref.document, actual_pref)
else:
self.assertIsNone(actual_pref)
self.assertNotIn("$query", request.doc)
return test
def generate_op_msg_read_mode_tests():
matrix = itertools.product(_MONGOS_MODES, operations)
for entry in matrix:
mode, operation = entry
test = create_op_msg_read_mode_test(mode, operation)
test_name = "test_{}_with_mode_{}".format(operation.name.replace(" ", "_"), mode)
test.__name__ = test_name
for cls in TestOpMsgMongos, TestOpMsgReplicaSet, TestOpMsgSingle:
cls.add_test(mode, test_name, test)
generate_op_msg_read_mode_tests()
if __name__ == "__main__":
unittest.main()
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