def test_output_data(self, data_field_class):
     #
     eval_chans = EvalChannels(data_field_class())
     eval_chans.infile = os.path.join(TEMP_DIR, 'eval-chans')
     eval_chans.args = {
         'axis': 'z',
         'thresh': 100
     }
     eval_chans.processed_data = {}
     #
     eval_chans.processed_data['chan_indicies_per_row'] = [
         [(2, 3), (6, 8)], [(12, 13), (16, 18)], [(22, 23), (26, 28)],
         [(32, 33), (36, 38)], [(42, 43), (46, 48)], [(52, 53), (56, 58)],
         [(62, 63), (66, 68)], [(72, 73), (76, 78)], [(82, 83), (86, 88)],
         [(92, 93), (96, 98)]
     ]
     eval_chans.processed_data['chans_per_row'] = [2, 2, 2, 2, 2, 2, 2, 2, 2, 2]
     eval_chans.processed_data['chan_widths_per_row'] = [[2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3]]
     eval_chans.processed_data['avg_chan_width_per_row'] = [2.5, 2.5, 2.5, 2.5, 2.5, 2.5, 2.5, 2.5, 2.5, 2.5]
     #
     eval_chans._output_data()
     assert eval_chans.outfile_content