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tailscale/net/dns/resolvconffile/resolvconffile_test.go

104 lines
2.5 KiB
Go

// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package resolvconffile
import (
"net/netip"
"reflect"
"strings"
"testing"
"tailscale.com/util/dnsname"
)
func TestParse(t *testing.T) {
tests := []struct {
in string
want *Config
wantErr bool
}{
{in: `nameserver 192.168.0.100`,
want: &Config{
Nameservers: []netip.Addr{
netip.MustParseAddr("192.168.0.100"),
},
},
},
{in: `nameserver 192.168.0.100 # comment`,
want: &Config{
Nameservers: []netip.Addr{
netip.MustParseAddr("192.168.0.100"),
},
},
},
{in: `nameserver 192.168.0.100#`,
want: &Config{
Nameservers: []netip.Addr{
netip.MustParseAddr("192.168.0.100"),
},
},
},
{in: `nameserver #192.168.0.100`, wantErr: true},
{in: `nameserver`, wantErr: true},
{in: `# nameserver 192.168.0.100`, want: &Config{}},
{in: `nameserver192.168.0.100`, wantErr: true},
{in: `search tailsacle.com`,
want: &Config{
SearchDomains: []dnsname.FQDN{"tailsacle.com."},
},
},
{in: `search tailsacle.com # typo`,
want: &Config{
SearchDomains: []dnsname.FQDN{"tailsacle.com."},
},
},
{in: `searchtailsacle.com`, wantErr: true},
{in: `search`, wantErr: true},
// Issue 6875: there can be multiple search domains, and even if they're
// over 253 bytes long total.
{
in: "search search-01.example search-02.example search-03.example search-04.example search-05.example search-06.example search-07.example search-08.example search-09.example search-10.example search-11.example search-12.example search-13.example search-14.example search-15.example\n",
want: &Config{
SearchDomains: []dnsname.FQDN{
"search-01.example.",
"search-02.example.",
"search-03.example.",
"search-04.example.",
"search-05.example.",
"search-06.example.",
"search-07.example.",
"search-08.example.",
"search-09.example.",
"search-10.example.",
"search-11.example.",
"search-12.example.",
"search-13.example.",
"search-14.example.",
"search-15.example.",
},
},
},
}
for _, tt := range tests {
cfg, err := Parse(strings.NewReader(tt.in))
if tt.wantErr {
if err != nil {
continue
}
t.Errorf("missing error for %q", tt.in)
continue
}
if err != nil {
t.Errorf("unexpected error for %q: %v", tt.in, err)
continue
}
if !reflect.DeepEqual(cfg, tt.want) {
t.Errorf("got: %v\nwant: %v\n", cfg, tt.want)
}
}
}