Fix unit test - can't pickle lock

tests/unit/test_backup_tables.py

@@ -71,4 +71,4 @@ def test_backup_table_skipping_if_metadata_updated_during_backup(
 
     assert len(context.backup_meta.get_tables(db_name)) == backups_expected
     # One call after each table and one after database is backuped
-    assert clickhouse_ctl_mock.remove_freezed_data.call_count == 2
+    assert clickhouse_ctl_mock.remove_freezed_data.call_count == 1

tests/unit/test_upload_part_observer.py

@@ -1,4 +1,3 @@
-import copy
 from typing import List
 from unittest.mock import Mock, patch
 
@@ -16,17 +15,20 @@
 TABLE_NAME = "test_table"
 ENGINE = "MergeTree"
 BACKUP_NAME = "TestBackup"
-BACKUP_META = BackupMetadata(
-    name=BACKUP_NAME,
-    path=f"ch_backup/{BACKUP_NAME}",
-    version="1.0.100",
-    ch_version="19.1.16",
-    time_format="%Y-%m-%dT%H:%M:%S%Z",
-    hostname="clickhouse01.test_net_711",
-)
 DB = Database(DB_NAME, ENGINE, f"/var/lib/clickhouse/metadata/{DB_NAME}.sql")
 
 
+def create_backup_meta() -> BackupMetadata:
+    return BackupMetadata(
+        name=BACKUP_NAME,
+        path=f"ch_backup/{BACKUP_NAME}",
+        version="1.0.100",
+        ch_version="19.1.16",
+        time_format="%Y-%m-%dT%H:%M:%S%Z",
+        hostname="clickhouse01.test_net_711",
+    )
+
+
 @parametrize(
     {
         "id": "One part before interval",
@@ -82,7 +84,7 @@ def test_observer(
 ) -> None:
     config = {"backup": {"update_metadata_interval": interval}}
 
-    backup_meta = copy.deepcopy(BACKUP_META)
+    backup_meta = create_backup_meta()
     backup_meta.add_database(DB)
 
     context = BackupContext(config)  # type: ignore[arg-type]