test_list_database_names should not check ordering

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    • Type: Build Failure
    • Resolution: Done
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      1. What would you like to communicate to the user about this feature? 2. Would you like the user to see examples of the syntax and/or executable code and its output? 3. Which versions of the driver/connector does this apply to?
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      Name of Failure:

      test_list_database_names

      Link to task:

      https://spruce.corp.mongodb.com/task/mongo_python_driver_compression_snappy_rhel8_test_standard_latest_python3.13_async_auth_ssl_sharded_cluster_cov_patch_08b806fd8764e1fe07aa2582452752f3bea2e632_69dd07006ee0270007cc9403_26_04_13_15_08_52/tests?execution=0&sorts=STATUS%3AASC

      Context of when and why the failure occurred:

      Latest server version changed the order of databases returned by test_list_database_names. Our test explicitly checks for order despite the spec not requiring it to do so.

      Stack trace:

      [2026/04/08 17:15:43.306] FAILURE: AssertionError: Lists differ: ['admin', 'config', 'db', 'database0', 'change-stream[76 chars]ike'] != ['admin', 'change-stream-tests', 'config', 'database0[76 chars]dDb']
[2026/04/08 17:15:43.306] First differing element 1:
[2026/04/08 17:15:43.306] 'config'
[2026/04/08 17:15:43.306] 'change-stream-tests'
[2026/04/08 17:15:43.306]   ['admin',
[2026/04/08 17:15:43.306] +  'change-stream-tests',
[2026/04/08 17:15:43.306]    'config',
[2026/04/08 17:15:43.306] +  'database0',
[2026/04/08 17:15:43.306]    'db',
[2026/04/08 17:15:43.306] -  'database0',
[2026/04/08 17:15:43.306] -  'change-stream-tests',
[2026/04/08 17:15:43.306] -  'shardedDb',
[2026/04/08 17:15:43.306]    'pymongo_test',
[2026/04/08 17:15:43.306]    'pymongo_test_bernie',
[2026/04/08 17:15:43.306] -  'pymongo_test_mike']
[2026/04/08 17:15:43.306] ?                     ^
[2026/04/08 17:15:43.306] +  'pymongo_test_mike',
[2026/04/08 17:15:43.306] ?                     ^
[2026/04/08 17:15:43.306] +  'shardedDb'] ()
[2026/04/08 17:15:43.306] self = <test.asynchronous.test_client.TestClient testMethod=test_list_database_names>
[2026/04/08 17:15:43.306]     async def test_list_database_names(self):
[2026/04/08 17:15:43.306]         await self.client.pymongo_test.test.insert_one({"dummy": "object"})
[2026/04/08 17:15:43.306]         await self.client.pymongo_test_mike.test.insert_one({"dummy": "object"})
[2026/04/08 17:15:43.306]         cmd_docs = (await self.client.admin.command("listDatabases"))["databases"]
[2026/04/08 17:15:43.306]         cmd_names = [doc["name"] for doc in cmd_docs]
[2026/04/08 17:15:43.306]     
[2026/04/08 17:15:43.306]         db_names = await self.client.list_database_names()
[2026/04/08 17:15:43.306]         self.assertIn("pymongo_test", db_names)
[2026/04/08 17:15:43.306]         self.assertIn("pymongo_test_mike", db_names)
[2026/04/08 17:15:43.306] >       self.assertEqual(db_names, cmd_names)
[2026/04/08 17:15:43.306] E       AssertionError: Lists differ: ['admin', 'config', 'db', 'database0', 'change-stream[76 chars]ike'] != ['admin', 'change-stream-tests', 'config', 'database0[76 chars]dDb']
[2026/04/08 17:15:43.306] E       
[2026/04/08 17:15:43.306] E       First differing element 1:
[2026/04/08 17:15:43.306] E       'config'
[2026/04/08 17:15:43.306] E       'change-stream-tests'
[2026/04/08 17:15:43.306] E       
[2026/04/08 17:15:43.306] E         ['admin',
[2026/04/08 17:15:43.306] E       +  'change-stream-tests',
[2026/04/08 17:15:43.306] E          'config',
[2026/04/08 17:15:43.306] E       +  'database0',
[2026/04/08 17:15:43.306] E          'db',
[2026/04/08 17:15:43.306] E       -  'database0',
[2026/04/08 17:15:43.306] E       -  'change-stream-tests',
[2026/04/08 17:15:43.306] E       -  'shardedDb',
[2026/04/08 17:15:43.306] E          'pymongo_test',
[2026/04/08 17:15:43.306] E          'pymongo_test_bernie',
[2026/04/08 17:15:43.306] E       -  'pymongo_test_mike']
[2026/04/08 17:15:43.306] E       ?                     ^
[2026/04/08 17:15:43.306] E       
[2026/04/08 17:15:43.306] E       +  'pymongo_test_mike',
[2026/04/08 17:15:43.306] E       ?                     ^
[2026/04/08 17:15:43.306] E       
[2026/04/08 17:15:43.306] E       +  'shardedDb']
[2026/04/08 17:15:43.306] test/asynchronous/test_client.py:1037: AssertionError

            Assignee:
            Noah Stapp
            Reporter:
            Noah Stapp
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              Created:
              Updated:
              Resolved: