public Io_line_rdr_fxt tst_Read_til_lines(int count, String... expd) {
lines.Clear();
for (int i = 0; i < expd.length; i++) expd[i] = expd[i] + Op_sys.Lnx.Nl_str();
for (int i = 0; i < count; i++) {
if (rdr.Read_next())
lines.Add(String_.new_u8(rdr.Bfr(), rdr.Itm_pos_bgn(), rdr.Itm_pos_end()));
else break;
}
Tfds.Eq_ary_str(expd, lines.To_str_ary());
return this;
}