code: def test_delta_cron_presets(self):
      preset_range = dates.date_range(
          datetime(2016, 1, 1), num=2, delta="@hourly"
      )
      timedelta_range = dates.date_range(
          datetime(2016, 1, 1), num=2, delta=timedelta(hours=1)
      )
      cron_range = dates.date_range(
          datetime(2016, 1, 1), num=2, delta="0 * * * *"
      )
  
      assert preset_range == timedelta_range
      assert preset_range == cron_range
  
file_path: airflow/tests/utils/test_dates.py
imports: from __future__ import annotations
  from datetime import datetime, timedelta
  import pendulum
  import pytest
  from dateutil.relativedelta import relativedelta
  from airflow.utils import dates, timezone
label_desc: Use image node_id 7 for calling the TestUtilsDatesDateRange obj's underlying member method code with example usage: obj.test_delta_cron_presets() without return types