def test_write_auto_filter_6(self):

        filter_condition = 'x == S*'
        exp = '<autoFilter ref="A1:D51"><filterColumn colId="0"><customFilters><customFilter val="S*"/></customFilters></filterColumn></autoFilter>'

        self.worksheet.filter_column('A', filter_condition)
        self.worksheet._write_auto_filter()

        got = self.fh.getvalue()

        self.assertEqual(got, exp)
Test the _write_auto_filter() method
dataset/ETHPy150Open jmcnamara/XlsxWriter/xlsxwriter/test/worksheet/test_write_auto_filter.py/TestWriteAutoFilter.test_write_auto_filter_6