50 lines
1.2 KiB
Go
50 lines
1.2 KiB
Go
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package dnsforward
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import (
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"net"
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"testing"
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"github.com/miekg/dns"
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)
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func TestServer(t *testing.T) {
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s := Server{}
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s.UDPListenAddr = &net.UDPAddr{Port: 0}
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err := s.Start(nil)
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if err != nil {
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t.Fatalf("Failed to start server: %s", err)
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}
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if s.udpListen == nil {
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t.Fatal("Started server has nil udpListen")
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}
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// server is running, send a message
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addr := s.udpListen.LocalAddr()
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req := dns.Msg{}
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req.Id = dns.Id()
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req.RecursionDesired = true
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req.Question = []dns.Question{
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{Name: "google-public-dns-a.google.com.", Qtype: dns.TypeA, Qclass: dns.ClassINET},
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}
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reply, err := dns.Exchange(&req, addr.String())
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if err != nil {
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t.Fatalf("Couldn't talk to server %s: %s", addr, err)
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}
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if len(reply.Answer) != 1 {
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t.Fatalf("DNS server %s returned reply with wrong number of answers - %d", addr, len(reply.Answer))
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}
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if a, ok := reply.Answer[0].(*dns.A); ok {
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if !net.IPv4(8, 8, 8, 8).Equal(a.A) {
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t.Fatalf("DNS server %s returned wrong answer instead of 8.8.8.8: %v", addr, a.A)
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}
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} else {
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t.Fatalf("DNS server %s returned wrong answer type instead of A: %v", addr, reply.Answer[0])
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}
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err = s.Stop()
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if err != nil {
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t.Fatalf("DNS server %s failed to stop: %s", addr, err)
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}
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}
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