code: def test_filter_date_start(date_dataframe):
      start_date = "02/01/19"
  
      df = date_dataframe.filter_date(
          column_name="DATE", start_date=start_date
      )
  
      test_date = pd.to_datetime("01/31/19")
      test_result = df[pd.to_datetime(df.DATE) <= test_date]
  
      assert test_result.empty
  
file_path: pyjanitor/tests/functions/test_filter_date.py
imports: import numpy
  import pandas
  import pytest
label_desc: Use image node_id 6 for calling a global function with example usage: test_filter_date_start(date_dataframe) without return types