87 lines
2.0 KiB
Go
87 lines
2.0 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build !js
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package net
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import (
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"strings"
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"testing"
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)
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type dnsNameTest struct {
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name string
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result bool
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}
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var dnsNameTests = []dnsNameTest{
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// RFC 2181, section 11.
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{"_xmpp-server._tcp.google.com", true},
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{"foo.com", true},
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{"1foo.com", true},
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{"26.0.0.73.com", true},
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{"10-0-0-1", true},
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{"fo-o.com", true},
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{"fo1o.com", true},
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{"foo1.com", true},
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{"a.b..com", false},
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{"a.b-.com", false},
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{"a.b.com-", false},
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{"a.b..", false},
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{"b.com.", true},
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}
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func emitDNSNameTest(ch chan<- dnsNameTest) {
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defer close(ch)
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var char63 = ""
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for i := 0; i < 63; i++ {
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char63 += "a"
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}
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char64 := char63 + "a"
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longDomain := strings.Repeat(char63+".", 5) + "example"
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for _, tc := range dnsNameTests {
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ch <- tc
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}
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ch <- dnsNameTest{char63 + ".com", true}
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ch <- dnsNameTest{char64 + ".com", false}
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// Remember: wire format is two octets longer than presentation
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// (length octets for the first and [root] last labels).
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// 253 is fine:
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ch <- dnsNameTest{longDomain[len(longDomain)-253:], true}
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// A terminal dot doesn't contribute to length:
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ch <- dnsNameTest{longDomain[len(longDomain)-253:] + ".", true}
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// 254 is bad:
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ch <- dnsNameTest{longDomain[len(longDomain)-254:], false}
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}
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func TestDNSName(t *testing.T) {
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ch := make(chan dnsNameTest)
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go emitDNSNameTest(ch)
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for tc := range ch {
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if isDomainName(tc.name) != tc.result {
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t.Errorf("isDomainName(%q) = %v; want %v", tc.name, !tc.result, tc.result)
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}
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}
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}
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func BenchmarkDNSName(b *testing.B) {
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testHookUninstaller.Do(uninstallTestHooks)
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benchmarks := append(dnsNameTests, []dnsNameTest{
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{strings.Repeat("a", 63), true},
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{strings.Repeat("a", 64), false},
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}...)
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for n := 0; n < b.N; n++ {
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for _, tc := range benchmarks {
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if isDomainName(tc.name) != tc.result {
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b.Errorf("isDomainName(%q) = %v; want %v", tc.name, !tc.result, tc.result)
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}
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}
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}
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}
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