test_csv.py 文件源码

def test_read_bigfield(self):
        # This exercises the buffer realloc functionality and field size
        # limits.
        limit = csv.field_size_limit()
        try:
            size = 50000
            bigstring = 'X' * size
            bigline = '%s,%s' % (bigstring, bigstring)
            self._read_test([bigline], [[bigstring, bigstring]])
            csv.field_size_limit(size)
            self._read_test([bigline], [[bigstring, bigstring]])
            self.assertEqual(csv.field_size_limit(), size)
            csv.field_size_limit(size-1)
            self.assertRaises(csv.Error, self._read_test, [bigline], [])
            self.assertRaises(TypeError, csv.field_size_limit, None)
            self.assertRaises(TypeError, csv.field_size_limit, 1, None)
        finally:
            csv.field_size_limit(limit)