PYTHON-4790 Migrate test_retryable_writes.py to async (#1876)

Author: sleepyStick

test/asynchronous/helpers.py

@@ -0,0 +1,360 @@
+# Copyright 2024-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.
+
+"""Shared constants and helper methods for pymongo, bson, and gridfs test suites."""
+from __future__ import annotations
+
+import base64
+import gc
+import multiprocessing
+import os
+import signal
+import socket
+import subprocess
+import sys
+import threading
+import time
+import traceback
+import unittest
+import warnings
+from asyncio import iscoroutinefunction
+
+try:
+    import ipaddress
+
+    HAVE_IPADDRESS = True
+except ImportError:
+    HAVE_IPADDRESS = False
+from functools import wraps
+from typing import Any, Callable, Dict, Generator, no_type_check
+from unittest import SkipTest
+
+from bson.son import SON
+from pymongo import common, message
+from pymongo.ssl_support import HAVE_SSL, _ssl  # type:ignore[attr-defined]
+from pymongo.uri_parser import parse_uri
+
+if HAVE_SSL:
+    import ssl
+
+_IS_SYNC = False
+
+# Enable debug output for uncollectable objects. PyPy does not have set_debug.
+if hasattr(gc, "set_debug"):
+    gc.set_debug(
+        gc.DEBUG_UNCOLLECTABLE | getattr(gc, "DEBUG_OBJECTS", 0) | getattr(gc, "DEBUG_INSTANCES", 0)
+    )
+
+# The host and port of a single mongod or mongos, or the seed host
+# for a replica set.
+host = os.environ.get("DB_IP", "localhost")
+port = int(os.environ.get("DB_PORT", 27017))
+IS_SRV = "mongodb+srv" in host
+
+db_user = os.environ.get("DB_USER", "user")
+db_pwd = os.environ.get("DB_PASSWORD", "password")
+
+CERT_PATH = os.path.join(os.path.dirname(os.path.realpath(__file__)), "certificates")
+CLIENT_PEM = os.environ.get("CLIENT_PEM", os.path.join(CERT_PATH, "client.pem"))
+CA_PEM = os.environ.get("CA_PEM", os.path.join(CERT_PATH, "ca.pem"))
+
+TLS_OPTIONS: Dict = {"tls": True}
+if CLIENT_PEM:
+    TLS_OPTIONS["tlsCertificateKeyFile"] = CLIENT_PEM
+if CA_PEM:
+    TLS_OPTIONS["tlsCAFile"] = CA_PEM
+
+COMPRESSORS = os.environ.get("COMPRESSORS")
+MONGODB_API_VERSION = os.environ.get("MONGODB_API_VERSION")
+TEST_LOADBALANCER = bool(os.environ.get("TEST_LOADBALANCER"))
+TEST_SERVERLESS = bool(os.environ.get("TEST_SERVERLESS"))
+SINGLE_MONGOS_LB_URI = os.environ.get("SINGLE_MONGOS_LB_URI")
+MULTI_MONGOS_LB_URI = os.environ.get("MULTI_MONGOS_LB_URI")
+
+if TEST_LOADBALANCER:
+    res = parse_uri(SINGLE_MONGOS_LB_URI or "")
+    host, port = res["nodelist"][0]
+    db_user = res["username"] or db_user
+    db_pwd = res["password"] or db_pwd
+elif TEST_SERVERLESS:
+    TEST_LOADBALANCER = True
+    res = parse_uri(SINGLE_MONGOS_LB_URI or "")
+    host, port = res["nodelist"][0]
+    db_user = res["username"] or db_user
+    db_pwd = res["password"] or db_pwd
+    TLS_OPTIONS = {"tls": True}
+    # Spec says serverless tests must be run with compression.
+    COMPRESSORS = COMPRESSORS or "zlib"
+
+
+# Shared KMS data.
+LOCAL_MASTER_KEY = base64.b64decode(
+    b"Mng0NCt4ZHVUYUJCa1kxNkVyNUR1QURhZ2h2UzR2d2RrZzh0cFBwM3R6NmdWMDFBMUN3YkQ"
+    b"5aXRRMkhGRGdQV09wOGVNYUMxT2k3NjZKelhaQmRCZGJkTXVyZG9uSjFk"
+)
+AWS_CREDS = {
+    "accessKeyId": os.environ.get("FLE_AWS_KEY", ""),
+    "secretAccessKey": os.environ.get("FLE_AWS_SECRET", ""),
+}
+AWS_CREDS_2 = {
+    "accessKeyId": os.environ.get("FLE_AWS_KEY2", ""),
+    "secretAccessKey": os.environ.get("FLE_AWS_SECRET2", ""),
+}
+AZURE_CREDS = {
+    "tenantId": os.environ.get("FLE_AZURE_TENANTID", ""),
+    "clientId": os.environ.get("FLE_AZURE_CLIENTID", ""),
+    "clientSecret": os.environ.get("FLE_AZURE_CLIENTSECRET", ""),
+}
+GCP_CREDS = {
+    "email": os.environ.get("FLE_GCP_EMAIL", ""),
+    "privateKey": os.environ.get("FLE_GCP_PRIVATEKEY", ""),
+}
+KMIP_CREDS = {"endpoint": os.environ.get("FLE_KMIP_ENDPOINT", "localhost:5698")}
+
+# Ensure Evergreen metadata doesn't result in truncation
+os.environ.setdefault("MONGOB_LOG_MAX_DOCUMENT_LENGTH", "2000")
+
+
+def is_server_resolvable():
+    """Returns True if 'server' is resolvable."""
+    socket_timeout = socket.getdefaulttimeout()
+    socket.setdefaulttimeout(1)
+    try:
+        try:
+            socket.gethostbyname("server")
+            return True
+        except OSError:
+            return False
+    finally:
+        socket.setdefaulttimeout(socket_timeout)
+
+
+def _create_user(authdb, user, pwd=None, roles=None, **kwargs):
+    cmd = SON([("createUser", user)])
+    # X509 doesn't use a password
+    if pwd:
+        cmd["pwd"] = pwd
+    cmd["roles"] = roles or ["root"]
+    cmd.update(**kwargs)
+    return authdb.command(cmd)
+
+
+class client_knobs:
+    def __init__(
+        self,
+        heartbeat_frequency=None,
+        min_heartbeat_interval=None,
+        kill_cursor_frequency=None,
+        events_queue_frequency=None,
+    ):
+        self.heartbeat_frequency = heartbeat_frequency
+        self.min_heartbeat_interval = min_heartbeat_interval
+        self.kill_cursor_frequency = kill_cursor_frequency
+        self.events_queue_frequency = events_queue_frequency
+
+        self.old_heartbeat_frequency = None
+        self.old_min_heartbeat_interval = None
+        self.old_kill_cursor_frequency = None
+        self.old_events_queue_frequency = None
+        self._enabled = False
+        self._stack = None
+
+    def enable(self):
+        self.old_heartbeat_frequency = common.HEARTBEAT_FREQUENCY
+        self.old_min_heartbeat_interval = common.MIN_HEARTBEAT_INTERVAL
+        self.old_kill_cursor_frequency = common.KILL_CURSOR_FREQUENCY
+        self.old_events_queue_frequency = common.EVENTS_QUEUE_FREQUENCY
+
+        if self.heartbeat_frequency is not None:
+            common.HEARTBEAT_FREQUENCY = self.heartbeat_frequency
+
+        if self.min_heartbeat_interval is not None:
+            common.MIN_HEARTBEAT_INTERVAL = self.min_heartbeat_interval
+
+        if self.kill_cursor_frequency is not None:
+            common.KILL_CURSOR_FREQUENCY = self.kill_cursor_frequency
+
+        if self.events_queue_frequency is not None:
+            common.EVENTS_QUEUE_FREQUENCY = self.events_queue_frequency
+        self._enabled = True
+        # Store the allocation traceback to catch non-disabled client_knobs.
+        self._stack = "".join(traceback.format_stack())
+
+    def __enter__(self):
+        self.enable()
+
+    @no_type_check
+    def disable(self):
+        common.HEARTBEAT_FREQUENCY = self.old_heartbeat_frequency
+        common.MIN_HEARTBEAT_INTERVAL = self.old_min_heartbeat_interval
+        common.KILL_CURSOR_FREQUENCY = self.old_kill_cursor_frequency
+        common.EVENTS_QUEUE_FREQUENCY = self.old_events_queue_frequency
+        self._enabled = False
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        self.disable()
+
+    def __call__(self, func):
+        def make_wrapper(f):
+            @wraps(f)
+            async def wrap(*args, **kwargs):
+                with self:
+                    return await f(*args, **kwargs)
+
+            return wrap
+
+        return make_wrapper(func)
+
+    def __del__(self):
+        if self._enabled:
+            msg = (
+                "ERROR: client_knobs still enabled! HEARTBEAT_FREQUENCY={}, "
+                "MIN_HEARTBEAT_INTERVAL={}, KILL_CURSOR_FREQUENCY={}, "
+                "EVENTS_QUEUE_FREQUENCY={}, stack:\n{}".format(
+                    common.HEARTBEAT_FREQUENCY,
+                    common.MIN_HEARTBEAT_INTERVAL,
+                    common.KILL_CURSOR_FREQUENCY,
+                    common.EVENTS_QUEUE_FREQUENCY,
+                    self._stack,
+                )
+            )
+            self.disable()
+            raise Exception(msg)
+
+
+def _all_users(db):
+    return {u["user"] for u in db.command("usersInfo").get("users", [])}
+
+
+def sanitize_cmd(cmd):
+    cp = cmd.copy()
+    cp.pop("$clusterTime", None)
+    cp.pop("$db", None)
+    cp.pop("$readPreference", None)
+    cp.pop("lsid", None)
+    if MONGODB_API_VERSION:
+        # Stable API parameters
+        cp.pop("apiVersion", None)
+    # OP_MSG encoding may move the payload type one field to the
+    # end of the command. Do the same here.
+    name = next(iter(cp))
+    try:
+        identifier = message._FIELD_MAP[name]
+        docs = cp.pop(identifier)
+        cp[identifier] = docs
+    except KeyError:
+        pass
+    return cp
+
+
+def sanitize_reply(reply):
+    cp = reply.copy()
+    cp.pop("$clusterTime", None)
+    cp.pop("operationTime", None)
+    return cp
+
+
+def print_thread_tracebacks() -> None:
+    """Print all Python thread tracebacks."""
+    for thread_id, frame in sys._current_frames().items():
+        sys.stderr.write(f"\n--- Traceback for thread {thread_id} ---\n")
+        traceback.print_stack(frame, file=sys.stderr)
+
+
+def print_thread_stacks(pid: int) -> None:
+    """Print all C-level thread stacks for a given process id."""
+    if sys.platform == "darwin":
+        cmd = ["lldb", "--attach-pid", f"{pid}", "--batch", "--one-line", '"thread backtrace all"']
+    else:
+        cmd = ["gdb", f"--pid={pid}", "--batch", '--eval-command="thread apply all bt"']
+
+    try:
+        res = subprocess.run(
+            cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, encoding="utf-8"
+        )
+    except Exception as exc:
+        sys.stderr.write(f"Could not print C-level thread stacks because {cmd[0]} failed: {exc}")
+    else:
+        sys.stderr.write(res.stdout)
+
+
+# Global knobs to speed up the test suite.
+global_knobs = client_knobs(events_queue_frequency=0.05)
+
+
+def _get_executors(topology):
+    executors = []
+    for server in topology._servers.values():
+        # Some MockMonitor do not have an _executor.
+        if hasattr(server._monitor, "_executor"):
+            executors.append(server._monitor._executor)
+        if hasattr(server._monitor, "_rtt_monitor"):
+            executors.append(server._monitor._rtt_monitor._executor)
+    executors.append(topology._Topology__events_executor)
+    if topology._srv_monitor:
+        executors.append(topology._srv_monitor._executor)
+
+    return [e for e in executors if e is not None]
+
+
+def print_running_topology(topology):
+    running = [e for e in _get_executors(topology) if not e._stopped]
+    if running:
+        print(
+            "WARNING: found Topology with running threads:\n"
+            f"  Threads: {running}\n"
+            f"  Topology: {topology}\n"
+            f"  Creation traceback:\n{topology._settings._stack}"
+        )
+
+
+def test_cases(suite):
+    """Iterator over all TestCases within a TestSuite."""
+    for suite_or_case in suite._tests:
+        if isinstance(suite_or_case, unittest.TestCase):
+            # unittest.TestCase
+            yield suite_or_case
+        else:
+            # unittest.TestSuite
+            yield from test_cases(suite_or_case)
+
+
+# Helper method to workaround https://bugs.python.org/issue21724
+def clear_warning_registry():
+    """Clear the __warningregistry__ for all modules."""
+    for _, module in list(sys.modules.items()):
+        if hasattr(module, "__warningregistry__"):
+            module.__warningregistry__ = {}  # type:ignore[attr-defined]
+
+
+class SystemCertsPatcher:
+    def __init__(self, ca_certs):
+        if (
+            ssl.OPENSSL_VERSION.lower().startswith("libressl")
+            and sys.platform == "darwin"
+            and not _ssl.IS_PYOPENSSL
+        ):
+            raise SkipTest(
+                "LibreSSL on OSX doesn't support setting CA certificates "
+                "using SSL_CERT_FILE environment variable."
+            )
+        self.original_certs = os.environ.get("SSL_CERT_FILE")
+        # Tell OpenSSL where CA certificates live.
+        os.environ["SSL_CERT_FILE"] = ca_certs
+
+    def disable(self):
+        if self.original_certs is None:
+            os.environ.pop("SSL_CERT_FILE")
+        else:
+            os.environ["SSL_CERT_FILE"] = self.original_certs