import pytest

from pandas.compat import StringIO

from pandas import read_sas
import pandas.util.testing as tm


class TestSas(object):

    def test_sas_buffer_format(self):
        # see gh-14947
        b = StringIO("")

        msg = ("If this is a buffer object rather than a string "
               "name, you must specify a format string")
        with pytest.raises(ValueError, match=msg):
            read_sas(b)

    def test_sas_read_no_format_or_extension(self):
        # see gh-24548
        msg = ("unable to infer format of SAS file")
        with tm.ensure_clean('test_file_no_extension') as path:
            with pytest.raises(ValueError, match=msg):
                read_sas(path)