anchor.diff:    group('CsvDataFrame (categories-less)', () {
       test('should properly parse csv file', () async {
         await testCsvData(
  -          fileName:
  -              'test/data_preprocessing/test_data/pima_indians_diabetes_database.csv',
  +          fileName: 'test/data_preprocessing/test_data/pima_indians_diabetes_database.csv',
             labelIdx: 8,
             expectedColsNum: 8,
             expectedRowsNum: 768,
  
positive.code:             ),
          throwsException,
        );
      });
  
      test('should cut out selected columns', () async {
  
negative.code:     test('should parse csv file with specified label column position',
          () async {
        await testCsvData(
            fileName: 'test/data_preprocessing/test_data/pima_indians_diabetes_database.csv',
            labelIdx: 1,
            expectedColsNum: 8,
            expectedRowsNum: 768,
  