anchor.diff:      ?assertEqual({'pandas.core.frame.DataFrame', [age,<<"name">>], [[29,<<"Allison">>],
           [29,<<"George">>], [30,<<"Kristen">>], [40,<<"Debbie">>], [40,<<"Bjork">>],
           [30,<<"Katy">>]]}, Erl).
  +
  +test_jun_pandas_drop_duplicates([{jun_worker, Pid}, {path, Path} | _]) ->
  +    {ok, {?DATAFRAME, DataFrame}} = jun_pandas:read_csv(Pid, Path, []),
  +    {ok, {?DATAFRAME, FinalDataFrame}} = jun_pandas:drop_duplicates(Pid, DataFrame, 'age', []),
  +    {ok, Erl} = jun_pandas:to_erl(Pid, FinalDataFrame),
  +    ?assertEqual({'pandas.core.frame.DataFrame', [<<"name">>,<<"age">>], [[<<"Allison">>, 29],
  +        [<<"Kristen">>,30], [<<"Debbie">>,40]]}, Erl).
  
positive.code:     test_jun_pandas_append/1,
      test_jun_pandas_update/1,
      test_jun_pandas_set_index/1,
      test_jun_pandas_reset_index/1]).
  
  all() ->
      [test_jun_pandas_drop,
  
negative.code:      test_jun_pandas_append,
       test_jun_pandas_update,
       test_jun_pandas_set_index,
       test_jun_pandas_reset_index,
       test_jun_pandas_drop_duplicates].
  
  init_per_testcase(_, _Config) ->
      % for each case start a new worker
  