PYTHON-5075 Convert test.test_csot to async (#2088)

Co-authored-by: Noah Stapp <noah@noahstapp.com>
Co-authored-by: Noah Stapp <noah.stapp@mongodb.com>

test/asynchronous/test_csot.py

@@ -0,0 +1,118 @@
+# Copyright 2022-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.
+
+"""Test the CSOT unified spec tests."""
+from __future__ import annotations
+
+import os
+import sys
+from pathlib import Path
+
+sys.path[0:0] = [""]
+
+from test.asynchronous import AsyncIntegrationTest, async_client_context, unittest
+from test.asynchronous.unified_format import generate_test_classes
+
+import pymongo
+from pymongo import _csot
+from pymongo.errors import PyMongoError
+
+_IS_SYNC = False
+
+# Location of JSON test specifications.
+if _IS_SYNC:
+    TEST_PATH = os.path.join(Path(__file__).resolve().parent, "csot")
+else:
+    TEST_PATH = os.path.join(Path(__file__).resolve().parent.parent, "csot")
+
+# Generate unified tests.
+globals().update(generate_test_classes(TEST_PATH, module=__name__))
+
+
+class TestCSOT(AsyncIntegrationTest):
+    RUN_ON_SERVERLESS = True
+    RUN_ON_LOAD_BALANCER = True
+
+    async def test_timeout_nested(self):
+        if os.environ.get("SKIP_CSOT_TESTS", ""):
+            raise unittest.SkipTest("SKIP_CSOT_TESTS is set, skipping...")
+        coll = self.db.coll
+        self.assertEqual(_csot.get_timeout(), None)
+        self.assertEqual(_csot.get_deadline(), float("inf"))
+        self.assertEqual(_csot.get_rtt(), 0.0)
+        with pymongo.timeout(10):
+            await coll.find_one()
+            self.assertEqual(_csot.get_timeout(), 10)
+            deadline_10 = _csot.get_deadline()
+
+            # Capped at the original 10 deadline.
+            with pymongo.timeout(15):
+                await coll.find_one()
+                self.assertEqual(_csot.get_timeout(), 15)
+                self.assertEqual(_csot.get_deadline(), deadline_10)
+
+            # Should be reset to previous values
+            self.assertEqual(_csot.get_timeout(), 10)
+            self.assertEqual(_csot.get_deadline(), deadline_10)
+            await coll.find_one()
+
+            with pymongo.timeout(5):
+                await coll.find_one()
+                self.assertEqual(_csot.get_timeout(), 5)
+                self.assertLess(_csot.get_deadline(), deadline_10)
+
+            # Should be reset to previous values
+            self.assertEqual(_csot.get_timeout(), 10)
+            self.assertEqual(_csot.get_deadline(), deadline_10)
+            await coll.find_one()
+
+        # Should be reset to previous values
+        self.assertEqual(_csot.get_timeout(), None)
+        self.assertEqual(_csot.get_deadline(), float("inf"))
+        self.assertEqual(_csot.get_rtt(), 0.0)
+
+    @async_client_context.require_change_streams
+    async def test_change_stream_can_resume_after_timeouts(self):
+        if os.environ.get("SKIP_CSOT_TESTS", ""):
+            raise unittest.SkipTest("SKIP_CSOT_TESTS is set, skipping...")
+        coll = self.db.test
+        await coll.insert_one({})
+        async with await coll.watch() as stream:
+            with pymongo.timeout(0.1):
+                with self.assertRaises(PyMongoError) as ctx:
+                    await stream.next()
+                self.assertTrue(ctx.exception.timeout)
+                self.assertTrue(stream.alive)
+                with self.assertRaises(PyMongoError) as ctx:
+                    await stream.try_next()
+                self.assertTrue(ctx.exception.timeout)
+                self.assertTrue(stream.alive)
+            # Resume before the insert on 3.6 because 4.0 is required to avoid skipping documents
+            if async_client_context.version < (4, 0):
+                await stream.try_next()
+            await coll.insert_one({})
+            with pymongo.timeout(10):
+                self.assertTrue(await stream.next())
+            self.assertTrue(stream.alive)
+            # Timeout applies to entire next() call, not only individual commands.
+            with pymongo.timeout(0.5):
+                with self.assertRaises(PyMongoError) as ctx:
+                    await stream.next()
+                self.assertTrue(ctx.exception.timeout)
+            self.assertTrue(stream.alive)
+        self.assertFalse(stream.alive)
+
+
+if __name__ == "__main__":
+    unittest.main()

test/asynchronous/unified_format.py

@@ -1387,7 +1387,6 @@ class UnifiedSpecTestMixinV1(AsyncIntegrationTest):
         # transaction (from a test failure) from blocking collection/database
         # operations during test set up and tear down.
         await self.kill_all_sessions()
-        self.addAsyncCleanup(self.kill_all_sessions)
 
         if "csot" in self.id().lower():
             # Retry CSOT tests up to 2 times to deal with flakey tests.
@@ -1395,7 +1394,11 @@ class UnifiedSpecTestMixinV1(AsyncIntegrationTest):
             for i in range(attempts):
                 try:
                     return await self._run_scenario(spec, uri)
-                except AssertionError:
+                except (AssertionError, OperationFailure) as exc:
+                    if isinstance(exc, OperationFailure) and (
+                        _IS_SYNC or "failpoint" not in exc._message
+                    ):
+                        raise
                     if i < attempts - 1:
                         print(
                             f"Retrying after attempt {i+1} of {self.id()} failed with:\n"

test/test_csot.py

@@ -17,6 +17,7 @@ from __future__ import annotations
 
 import os
 import sys
+from pathlib import Path
 
 sys.path[0:0] = [""]
 
@@ -27,8 +28,13 @@ import pymongo
 from pymongo import _csot
 from pymongo.errors import PyMongoError
 
+_IS_SYNC = True
+
 # Location of JSON test specifications.
-TEST_PATH = os.path.join(os.path.dirname(os.path.realpath(__file__)), "csot")
+if _IS_SYNC:
+    TEST_PATH = os.path.join(Path(__file__).resolve().parent, "csot")
+else:
+    TEST_PATH = os.path.join(Path(__file__).resolve().parent.parent, "csot")
 
 # Generate unified tests.
 globals().update(generate_test_classes(TEST_PATH, module=__name__))

test/unified_format.py

@@ -1374,7 +1374,6 @@ class UnifiedSpecTestMixinV1(IntegrationTest):
         # transaction (from a test failure) from blocking collection/database
         # operations during test set up and tear down.
         self.kill_all_sessions()
-        self.addCleanup(self.kill_all_sessions)
 
         if "csot" in self.id().lower():
             # Retry CSOT tests up to 2 times to deal with flakey tests.
@@ -1382,7 +1381,11 @@ class UnifiedSpecTestMixinV1(IntegrationTest):
             for i in range(attempts):
                 try:
                     return self._run_scenario(spec, uri)
-                except AssertionError:
+                except (AssertionError, OperationFailure) as exc:
+                    if isinstance(exc, OperationFailure) and (
+                        _IS_SYNC or "failpoint" not in exc._message
+                    ):
+                        raise
                     if i < attempts - 1:
                         print(
                             f"Retrying after attempt {i+1} of {self.id()} failed with:\n"

tools/synchro.py

@@ -208,6 +208,7 @@ converted_tests = [
     "test_connections_survive_primary_stepdown_spec.py",
     "test_create_entities.py",
     "test_crud_unified.py",
+    "test_csot.py",
     "test_cursor.py",
     "test_custom_types.py",
     "test_database.py",