static UnixResolverOptions parseEtcResolverOptions() throws IOException {
        return parseEtcResolverOptions(new File(ETC_RESOLV_CONF_FILE));
    }
@Test
    public void defaultValueReturnedIfTimeoutOptionsIsNotPresent(@TempDir Path tempDir) throws IOException {
        File f = buildFile(tempDir, "search localdomain\n" +
            "nameserver 127.0.0.11\n");
        assertEquals(5, parseEtcResolverOptions(f).timeout());
    }