code: def test_sort_timestamps_monotonically(timeseries_dataframe):
      """Test sort_timestamps_monotonically for ascending order"""
      df = timeseries_dataframe.shuffle(
          reset_index=False
      ).sort_timestamps_monotonically()
      assert df.equals(timeseries_dataframe)
  
file_path: pyjanitor/tests/timeseries/test_sort_timestamps_monotonically.py
imports: from random import randint
  import pandas
  import pytest
  import janitor
  import janitor.timeseries
label_desc: Use image node_id 2 for calling a global function with example usage: test_sort_timestamps_monotonically(timeseries_dataframe) without return types