// Copyright 2009 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. // TODO It would be nice to use a mock DNS server, to eliminate // external dependencies. package net import ( "flag" "strings" "testing" ) var testExternal = flag.Bool("external", true, "allow use of external networks during long test") func TestGoogleSRV(t *testing.T) { if testing.Short() || !*testExternal { t.Skip("skipping test to avoid external network") } _, addrs, err := LookupSRV("xmpp-server", "tcp", "google.com") if err != nil { t.Errorf("failed: %s", err) } if len(addrs) == 0 { t.Errorf("no results") } // Non-standard back door. _, addrs, err = LookupSRV("", "", "_xmpp-server._tcp.google.com") if err != nil { t.Errorf("back door failed: %s", err) } if len(addrs) == 0 { t.Errorf("back door no results") } } func TestGmailMX(t *testing.T) { if testing.Short() || !*testExternal { t.Skip("skipping test to avoid external network") } mx, err := LookupMX("gmail.com") if err != nil { t.Errorf("failed: %s", err) } if len(mx) == 0 { t.Errorf("no results") } } func TestGmailNS(t *testing.T) { if testing.Short() || !*testExternal { t.Skip("skipping test to avoid external network") } ns, err := LookupNS("gmail.com") if err != nil { t.Errorf("failed: %s", err) } if len(ns) == 0 { t.Errorf("no results") } } func TestGmailTXT(t *testing.T) { if testing.Short() || !*testExternal { t.Skip("skipping test to avoid external network") } txt, err := LookupTXT("gmail.com") if err != nil { t.Errorf("failed: %s", err) } if len(txt) == 0 || len(txt[0]) == 0 { t.Errorf("no results") } } func TestGoogleDNSAddr(t *testing.T) { if testing.Short() || !*testExternal { t.Skip("skipping test to avoid external network") } names, err := LookupAddr("8.8.8.8") if err != nil { t.Errorf("failed: %s", err) } if len(names) == 0 { t.Errorf("no results") } } func TestLookupIANACNAME(t *testing.T) { if testing.Short() || !*testExternal { t.Skip("skipping test to avoid external network") } cname, err := LookupCNAME("www.iana.org") if !strings.HasSuffix(cname, ".icann.org.") || err != nil { t.Errorf(`LookupCNAME("www.iana.org.") = %q, %v, want "*.icann.org.", nil`, cname, err) } } var revAddrTests = []struct { Addr string Reverse string ErrPrefix string }{ {"1.2.3.4", "4.3.2.1.in-addr.arpa.", ""}, {"245.110.36.114", "114.36.110.245.in-addr.arpa.", ""}, {"::ffff:12.34.56.78", "78.56.34.12.in-addr.arpa.", ""}, {"::1", "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa.", ""}, {"1::", "0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.0.0.0.ip6.arpa.", ""}, {"1234:567::89a:bcde", "e.d.c.b.a.9.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.7.6.5.0.4.3.2.1.ip6.arpa.", ""}, {"1234:567:fefe:bcbc:adad:9e4a:89a:bcde", "e.d.c.b.a.9.8.0.a.4.e.9.d.a.d.a.c.b.c.b.e.f.e.f.7.6.5.0.4.3.2.1.ip6.arpa.", ""}, {"1.2.3", "", "unrecognized address"}, {"1.2.3.4.5", "", "unrecognized address"}, {"1234:567:bcbca::89a:bcde", "", "unrecognized address"}, {"1234:567::bcbc:adad::89a:bcde", "", "unrecognized address"}, } func TestReverseAddress(t *testing.T) { for i, tt := range revAddrTests { a, err := reverseaddr(tt.Addr) if len(tt.ErrPrefix) > 0 && err == nil { t.Errorf("#%d: expected %q, got (error)", i, tt.ErrPrefix) continue } if len(tt.ErrPrefix) == 0 && err != nil { t.Errorf("#%d: expected , got %q (error)", i, err) } if err != nil && err.(*DNSError).Err != tt.ErrPrefix { t.Errorf("#%d: expected %q, got %q (mismatched error)", i, tt.ErrPrefix, err.(*DNSError).Err) } if a != tt.Reverse { t.Errorf("#%d: expected %q, got %q (reverse address)", i, tt.Reverse, a) } } }