1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
# Copyright 2015-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.
"""Utilities for testing Server Selection and Max Staleness."""
from __future__ import annotations
import datetime
import os
import sys
from test import PyMongoTestCase
from test.utils import MockPool
sys.path[0:0] = [""]
from test import unittest
from test.pymongo_mocks import DummyMonitor
from test.utils_selection_tests_shared import (
get_addresses,
get_topology_type_name,
make_server_description,
)
from test.utils_shared import parse_read_preference
from bson import json_util
from pymongo.common import HEARTBEAT_FREQUENCY
from pymongo.errors import AutoReconnect, ConfigurationError
from pymongo.operations import _Op
from pymongo.server_selectors import writable_server_selector
from pymongo.synchronous.settings import TopologySettings
from pymongo.synchronous.topology import Topology
_IS_SYNC = True
def get_topology_settings_dict(**kwargs):
settings = {
"monitor_class": DummyMonitor,
"heartbeat_frequency": HEARTBEAT_FREQUENCY,
"pool_class": MockPool,
}
settings.update(kwargs)
return settings
def create_topology(scenario_def, **kwargs):
# Initialize topologies.
if "heartbeatFrequencyMS" in scenario_def:
frequency = int(scenario_def["heartbeatFrequencyMS"]) / 1000.0
else:
frequency = HEARTBEAT_FREQUENCY
seeds, hosts = get_addresses(scenario_def["topology_description"]["servers"])
topology_type = get_topology_type_name(scenario_def)
if topology_type == "LoadBalanced":
kwargs.setdefault("load_balanced", True)
# Force topology description to ReplicaSet
elif topology_type in ["ReplicaSetNoPrimary", "ReplicaSetWithPrimary"]:
kwargs.setdefault("replica_set_name", "rs")
settings = get_topology_settings_dict(heartbeat_frequency=frequency, seeds=seeds, **kwargs)
# "Eligible servers" is defined in the server selection spec as
# the set of servers matching both the ReadPreference's mode
# and tag sets.
topology = Topology(TopologySettings(**settings))
topology.open()
# Update topologies with server descriptions.
for server in scenario_def["topology_description"]["servers"]:
server_description = make_server_description(server, hosts)
topology.on_change(server_description)
# Assert that descriptions match
assert (
scenario_def["topology_description"]["type"] == topology.description.topology_type_name
), topology.description.topology_type_name
return topology
def create_test(scenario_def):
def run_scenario(self):
_, hosts = get_addresses(scenario_def["topology_description"]["servers"])
# "Eligible servers" is defined in the server selection spec as
# the set of servers matching both the ReadPreference's mode
# and tag sets.
top_latency = create_topology(scenario_def)
# "In latency window" is defined in the server selection
# spec as the subset of suitable_servers that falls within the
# allowable latency window.
top_suitable = create_topology(scenario_def, local_threshold_ms=1000000)
# Create server selector.
if scenario_def.get("operation") == "write":
pref = writable_server_selector
else:
# Make first letter lowercase to match read_pref's modes.
pref_def = scenario_def["read_preference"]
if scenario_def.get("error"):
with self.assertRaises((ConfigurationError, ValueError)):
# Error can be raised when making Read Pref or selecting.
pref = parse_read_preference(pref_def)
top_latency.select_server(pref, _Op.TEST)
return
pref = parse_read_preference(pref_def)
# Select servers.
if not scenario_def.get("suitable_servers"):
with self.assertRaises(AutoReconnect):
top_suitable.select_server(pref, _Op.TEST, server_selection_timeout=0)
return
if not scenario_def["in_latency_window"]:
with self.assertRaises(AutoReconnect):
top_latency.select_server(pref, _Op.TEST, server_selection_timeout=0)
return
actual_suitable_s = top_suitable.select_servers(pref, _Op.TEST, server_selection_timeout=0)
actual_latency_s = top_latency.select_servers(pref, _Op.TEST, server_selection_timeout=0)
expected_suitable_servers = {}
for server in scenario_def["suitable_servers"]:
server_description = make_server_description(server, hosts)
expected_suitable_servers[server["address"]] = server_description
actual_suitable_servers = {}
for s in actual_suitable_s:
actual_suitable_servers[
"%s:%d" % (s.description.address[0], s.description.address[1])
] = s.description
self.assertEqual(len(actual_suitable_servers), len(expected_suitable_servers))
for k, actual in actual_suitable_servers.items():
expected = expected_suitable_servers[k]
self.assertEqual(expected.address, actual.address)
self.assertEqual(expected.server_type, actual.server_type)
self.assertEqual(expected.round_trip_time, actual.round_trip_time)
self.assertEqual(expected.tags, actual.tags)
self.assertEqual(expected.all_hosts, actual.all_hosts)
expected_latency_servers = {}
for server in scenario_def["in_latency_window"]:
server_description = make_server_description(server, hosts)
expected_latency_servers[server["address"]] = server_description
actual_latency_servers = {}
for s in actual_latency_s:
actual_latency_servers[
"%s:%d" % (s.description.address[0], s.description.address[1])
] = s.description
self.assertEqual(len(actual_latency_servers), len(expected_latency_servers))
for k, actual in actual_latency_servers.items():
expected = expected_latency_servers[k]
self.assertEqual(expected.address, actual.address)
self.assertEqual(expected.server_type, actual.server_type)
self.assertEqual(expected.round_trip_time, actual.round_trip_time)
self.assertEqual(expected.tags, actual.tags)
self.assertEqual(expected.all_hosts, actual.all_hosts)
return run_scenario
def create_selection_tests(test_dir):
class TestAllScenarios(PyMongoTestCase):
pass
for dirpath, _, filenames in os.walk(test_dir):
dirname = os.path.split(dirpath)
dirname = os.path.split(dirname[-2])[-1] + "_" + dirname[-1]
for filename in filenames:
if os.path.splitext(filename)[1] != ".json":
continue
with open(os.path.join(dirpath, filename)) as scenario_stream:
scenario_def = json_util.loads(scenario_stream.read())
# Construct test from scenario.
new_test = create_test(scenario_def)
test_name = f"test_{dirname}_{os.path.splitext(filename)[0]}"
new_test.__name__ = test_name
setattr(TestAllScenarios, new_test.__name__, new_test)
return TestAllScenarios
|
