anchor.diff:            });
       });
   
  -    test(
  -        'should parse csv file with specified label column position, position is 0',
  -        () async {
  -      await testCsvData(
  -          fileName:
  -              'test/data_preprocessing/test_data/pima_indians_diabetes_database.csv',
  +    test('should parse csv file with specified label column position, '
  +        'position is 0', () async {
  +      await testCsvData(
  +          fileName: 'test/data_preprocessing/test_data/pima_indians_diabetes_database.csv',
             labelIdx: 0,
             expectedColsNum: 8,
             expectedRowsNum: 768,
  
positive.code:             ),
          throwsException,
        );
      });
  
      test('should cut out selected columns', () async {
  
negative.code:   group('CsvDataFrame (categories-less)', () {
      test('should properly parse csv file', () async {
        await testCsvData(
            fileName: 'test/data_preprocessing/test_data/pima_indians_diabetes_database.csv',
            labelIdx: 8,
            expectedColsNum: 8,
            expectedRowsNum: 768,
  