@Test
public void testLookupNonExisting() throws Exception {
DnsClient dns = prepareDns(FakeDNSServer.testLookupNonExisting());
dns.lookup("gfegjegjf.sg1", ar -> {
DnsException cause = (DnsException)ar.cause();
assertEquals(DnsResponseCode.NXDOMAIN, cause.code());
testComplete();
});
await();
}