// 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 tailscale.com`, want: &Config{ SearchDomains: []dnsname.FQDN{"tailscale.com."}, }, }, {in: `search tailscale.com # comment`, want: &Config{ SearchDomains: []dnsname.FQDN{"tailscale.com."}, }, }, {in: `searchtailscale.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) } } }