1 // Copyright 2009 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package net 6 7 import ( 8 "strings" 9 "testing" 10 ) 11 12 type dnsNameTest struct { 13 name string 14 result bool 15 } 16 17 var dnsNameTests = []dnsNameTest{ 18 // RFC2181, section 11. 19 {"_xmpp-server._tcp.google.com", true}, 20 {"foo.com", true}, 21 {"1foo.com", true}, 22 {"26.0.0.73.com", true}, 23 {"fo-o.com", true}, 24 {"fo1o.com", true}, 25 {"foo1.com", true}, 26 {"a.b..com", false}, 27 {"a.b-.com", false}, 28 {"a.b.com-", false}, 29 {"a.b..", false}, 30 {"b.com.", true}, 31 } 32 33 func emitDNSNameTest(ch chan<- dnsNameTest) { 34 defer close(ch) 35 var char59 = "" 36 var char63 = "" 37 var char64 = "" 38 for i := 0; i < 59; i++ { 39 char59 += "a" 40 } 41 char63 = char59 + "aaaa" 42 char64 = char63 + "a" 43 44 for _, tc := range dnsNameTests { 45 ch <- tc 46 } 47 48 ch <- dnsNameTest{char63 + ".com", true} 49 ch <- dnsNameTest{char64 + ".com", false} 50 // 255 char name is fine: 51 ch <- dnsNameTest{char59 + "." + char63 + "." + char63 + "." + 52 char63 + ".com", 53 true} 54 // 256 char name is bad: 55 ch <- dnsNameTest{char59 + "a." + char63 + "." + char63 + "." + 56 char63 + ".com", 57 false} 58 } 59 60 func TestDNSName(t *testing.T) { 61 ch := make(chan dnsNameTest) 62 go emitDNSNameTest(ch) 63 for tc := range ch { 64 if isDomainName(tc.name) != tc.result { 65 t.Errorf("isDomainName(%q) = %v; want %v", tc.name, !tc.result, tc.result) 66 } 67 } 68 } 69 70 func BenchmarkDNSName(b *testing.B) { 71 testHookUninstaller.Do(uninstallTestHooks) 72 73 benchmarks := append(dnsNameTests, []dnsNameTest{ 74 {strings.Repeat("a", 63), true}, 75 {strings.Repeat("a", 64), false}, 76 }...) 77 for n := 0; n < b.N; n++ { 78 for _, tc := range benchmarks { 79 if isDomainName(tc.name) != tc.result { 80 b.Errorf("isDomainName(%q) = %v; want %v", tc.name, !tc.result, tc.result) 81 } 82 } 83 } 84 } 85
