'Test the _write_page_setup() method. With print_across()'

def test_write_page_setup_print_across(self):

    self.worksheet.print_across()
    self.worksheet._write_page_setup()
    exp = '<pageSetup    pageOrder="overThenDown"    orientation="portrait"/>'
    got = self.fh.getvalue()
    self.assertEqual(got, exp)
