fix matching DataLoader test code

test/io/test_dataset_loader.py

@@ -64,13 +64,13 @@ class TestDatasetLoader(unittest.TestCase):
     def test_import(self):
         import fastNLP
         from fastNLP.io import SNLILoader
-        ds = SNLILoader().process('./../data_for_tests/sample_snli.jsonl', to_lower=True,
+        ds = SNLILoader().process('test/data_for_tests/sample_snli.jsonl', to_lower=True,
                                   get_index=True, seq_len_type='seq_len', extra_split=['-'])
         assert 'train' in ds.datasets
         assert len(ds.datasets) == 1
         assert len(ds.datasets['train']) == 3
 
-        ds = SNLILoader().process('./../data_for_tests/sample_snli.jsonl', to_lower=True,
+        ds = SNLILoader().process('test/data_for_tests/sample_snli.jsonl', to_lower=True,
                                   get_index=True, seq_len_type='seq_len')
         assert 'train' in ds.datasets
         assert len(ds.datasets) == 1