static UnixResolverOptions parseEtcResolverOptions() throws IOException {
        return parseEtcResolverOptions(new File(ETC_RESOLV_CONF_FILE));
    }
@Test
    public void timeoutOptionIsParsedIfPresent(@TempDir Path tempDir) throws IOException {
        File f = buildFile(tempDir, "search localdomain\n" +
            "nameserver 127.0.0.11\n" +
            "options timeout:0\n");
        assertEquals(0, parseEtcResolverOptions(f).timeout());

        f = buildFile(tempDir, "search localdomain\n" +
            "nameserver 127.0.0.11\n" +
            "options foo:bar timeout:124\n");
        assertEquals(124, parseEtcResolverOptions(f).timeout());
    }