Test fix for garbage collection issue

Author: tolik0

airbyte_cdk/sources/declarative/incremental/concurrent_partition_cursor.py

@@ -295,16 +295,20 @@ def _generate_slices_from_partition(
             ):
                 self._partition_parent_state_map[partition_key] = (deepcopy(parent_state), seq)
 
-        for cursor_slice, is_last_slice, _ in iterate_with_last_flag_and_state(
-            cursor.stream_slices(),
-            lambda: None,
-        ):
-            self._semaphore_per_partition[partition_key].release()
-            if is_last_slice:
-                self._partitions_done_generating_stream_slices.add(partition_key)
-            yield StreamSlice(
-                partition=partition, cursor_slice=cursor_slice, extra_fields=partition.extra_fields
-            )
+        try:
+            for cursor_slice, is_last_slice, _ in iterate_with_last_flag_and_state(
+                cursor.stream_slices(),
+                lambda: None,
+            ):
+                self._semaphore_per_partition[partition_key].release()
+                if is_last_slice:
+                    self._partitions_done_generating_stream_slices.add(partition_key)
+                yield StreamSlice(
+                    partition=partition, cursor_slice=cursor_slice, extra_fields=partition.extra_fields
+                )
+        finally:
+            del cursor
+            del partition
 
     def _ensure_partition_limit(self) -> None:
         """
@@ -492,11 +496,10 @@ def _to_dict(self, partition_key: str) -> Mapping[str, Any]:
     def _create_cursor(
         self, cursor_state: Any, runtime_lookback_window: int = 0
     ) -> ConcurrentCursor:
-        cursor = self._cursor_factory.create(
+        return self._cursor_factory.create(
             stream_state=deepcopy(cursor_state),
             runtime_lookback_window=timedelta(seconds=runtime_lookback_window),
         )
-        return cursor
 
     def should_be_synced(self, record: Record) -> bool:
         return self._get_cursor(record).should_be_synced(record)
@@ -511,8 +514,7 @@ def _get_cursor(self, record: Record) -> ConcurrentCursor:
             raise ValueError(
                 "Invalid state as stream slices that are emitted should refer to an existing cursor"
             )
-        cursor = self._cursor_per_partition[partition_key]
-        return cursor
+        return self._cursor_per_partition[partition_key]
 
     def limit_reached(self) -> bool:
         return self._number_of_partitions > self.SWITCH_TO_GLOBAL_LIMIT