code: def test_fill_missing_timestamps(timeseries_dataframe):
      """Test that filling missing timestamps works as expected."""
      # Remove random row from the data frame
      random_number = randint(1, len(timeseries_dataframe))
      df1 = timeseries_dataframe.drop(
          timeseries_dataframe.index[random_number]
      )
  
      # Fill missing timestamps
      # fix for GH#1184 is to use the start and end from
      # timeseries_dataframe
      # imagine that the last row of df1 is removed, or the first entry
      # the length check in the assert line will fail
      result = fill_missing_timestamps(
          df1,
          frequency="1H",
          first_time_stamp=timeseries_dataframe.index.min(),
          last_time_stamp=timeseries_dataframe.index.max(),
      )
  
      # Testing if the missing timestamp has been filled
      assert len(result) == len(timeseries_dataframe)
  
      # Testing if indices are exactly the same after filling
      original_index = timeseries_dataframe.index
      new_index = result.index
      delta = original_index.difference(new_index)
  
      assert delta.empty is True
  
imports: from random import randint
  import pandas
  import pytest
  from janitor.timeseries import _get_missing_timestamps, fill_missing_timestamps
label_desc: Use image node_id 2 for calling a global function with example usage: test_fill_missing_timestamps(timeseries_dataframe) without return types