k8s.io/kubernetes@v1.31.0-alpha.0.0.20240520171757-56147500dadc/third_party/forked/golang/net/dnsclient_test.go (about)

     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  // This package is copied from Go library net.
     6  // https://golang.org/src/net/dnsclient.go
     7  // The original private function reverseaddr
     8  // is exported as public function.
     9  
    10  package net
    11  
    12  import (
    13  	"net"
    14  	"testing"
    15  )
    16  
    17  func TestReverseaddr(t *testing.T) {
    18  	var revAddrTests = []struct {
    19  		Addr      string
    20  		Reverse   string
    21  		ErrPrefix string
    22  	}{
    23  		{"1.2.3.4", "4.3.2.1.in-addr.arpa.", ""},
    24  		{"245.110.36.114", "114.36.110.245.in-addr.arpa.", ""},
    25  		{"::ffff:12.34.56.78", "78.56.34.12.in-addr.arpa.", ""},
    26  		{"::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.", ""},
    27  		{"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.", ""},
    28  		{"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.", ""},
    29  		{"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.", ""},
    30  		{"1.2.3", "", "unrecognized address"},
    31  		{"1.2.3.4.5", "", "unrecognized address"},
    32  		{"1234:567:bcbca::89a:bcde", "", "unrecognized address"},
    33  		{"1234:567::bcbc:adad::89a:bcde", "", "unrecognized address"},
    34  	}
    35  	for i, tt := range revAddrTests {
    36  		a, err := Reverseaddr(tt.Addr)
    37  		if len(tt.ErrPrefix) > 0 && err == nil {
    38  			t.Errorf("#%d: expected %q, got <nil> (error)", i, tt.ErrPrefix)
    39  			continue
    40  		}
    41  		if len(tt.ErrPrefix) == 0 && err != nil {
    42  			t.Errorf("#%d: expected <nil>, got %q (error)", i, err)
    43  		}
    44  		if err != nil && err.(*net.DNSError).Err != tt.ErrPrefix {
    45  			t.Errorf("#%d: expected %q, got %q (mismatched error)", i, tt.ErrPrefix, err.(*net.DNSError).Err)
    46  		}
    47  		if a != tt.Reverse {
    48  			t.Errorf("#%d: expected %q, got %q (reverse address)", i, tt.Reverse, a)
    49  		}
    50  	}
    51  }