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package dhcpv6
import (
"errors"
"fmt"
"testing"
"github.com/google/go-cmp/cmp"
"github.com/google/go-cmp/cmp/cmpopts"
"github.com/insomniacslk/dhcp/rfc1035label"
"github.com/stretchr/testify/require"
"github.com/u-root/uio/uio"
)
func TestFQDNParseAndGetter(t *testing.T) {
for i, tt := range []struct {
buf []byte
err error
want *OptFQDN
}{
{
buf: []byte{
0, 39, // FQDN option
0, 34, // length
0, // flags
7, 'e', 'x', 'a', 'm', 'p', 'l', 'e', 3, 'c', 'o', 'm', 0,
6, 's', 'u', 'b', 'n', 'e', 't', 7, 'e', 'x', 'a', 'm', 'p', 'l', 'e', 3, 'o', 'r', 'g', 0,
},
want: &OptFQDN{
Flags: 0,
DomainName: &rfc1035label.Labels{
Labels: []string{
"example.com",
"subnet.example.org",
},
},
},
},
{
buf: []byte{
0, 39, // FQDN
0, 23, // length
0, // flags
7, 'e', 'x', 'a', 'm', 'p', 'l', 'e', 3, 'c', 'o', 'm', 0,
6, 's', 'u', 'b', 'n', 'e', 't', 7, 'e', // truncated
},
err: rfc1035label.ErrBufferTooShort,
},
{
buf: nil,
want: nil,
},
{
buf: []byte{0, 39, 0},
want: nil,
err: uio.ErrUnreadBytes,
},
} {
t.Run(fmt.Sprintf("%d", i), func(t *testing.T) {
var mo MessageOptions
if err := mo.FromBytes(tt.buf); !errors.Is(err, tt.err) {
t.Errorf("FromBytes = %v, want %v", err, tt.err)
}
got := mo.FQDN()
if !cmp.Equal(got, tt.want, cmpopts.IgnoreUnexported(rfc1035label.Labels{})) {
t.Errorf("FQDN = %v, want %v", got, tt.want)
}
if tt.want != nil {
var m MessageOptions
m.Add(tt.want)
got := m.ToBytes()
if diff := cmp.Diff(tt.buf, got); diff != "" {
t.Errorf("ToBytes mismatch (-want, +got): %s", diff)
}
}
})
}
}
func TestOptFQDNString(t *testing.T) {
opt := &OptFQDN{
DomainName: &rfc1035label.Labels{
Labels: []string{"cnos.localhost"},
},
}
require.Equal(t, "FQDN: {Flags=0 DomainName=[cnos.localhost]}", opt.String())
}
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