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|
package dhcp6
import (
"bytes"
"reflect"
"testing"
)
// TestPacketMarshalBinary verifies that Packet.MarshalBinary allocates and returns a correct
// byte slice for a variety of input data.
func TestPacketMarshalBinary(t *testing.T) {
var tests = []struct {
desc string
packet *Packet
buf []byte
}{
{
desc: "empty packet",
packet: &Packet{},
buf: []byte{0, 0, 0, 0},
},
{
desc: "Solicit only",
packet: &Packet{
MessageType: MessageTypeSolicit,
},
buf: []byte{1, 0, 0, 0},
},
{
desc: "Solicit, [1 2 3] transaction ID",
packet: &Packet{
MessageType: MessageTypeSolicit,
TransactionID: [3]byte{1, 2, 3},
},
buf: []byte{1, 1, 2, 3},
},
{
desc: "Solicit, [2, 3, 4] transaction ID, option client ID [0 1]",
packet: &Packet{
MessageType: MessageTypeSolicit,
TransactionID: [3]byte{1, 2, 3},
Options: Options{
OptionClientID: [][]byte{{0, 1}},
},
},
buf: []byte{1, 1, 2, 3, 0, 1, 0, 2, 0, 1},
},
}
for i, tt := range tests {
buf, err := tt.packet.MarshalBinary()
if err != nil {
t.Fatal(err)
}
if want, got := tt.buf, buf; !bytes.Equal(want, got) {
t.Fatalf("[%02d] test %q, unexpected packet bytes:\n- want: %v\n- got: %v",
i, tt.desc, want, got)
}
}
}
// TestPacketUnmarshalBinary verifies that Packet.UnmarshalBinary returns
// appropriate Packets and errors for various input byte slices.
func TestPacketUnmarshalBinary(t *testing.T) {
var tests = []struct {
desc string
buf []byte
packet *Packet
err error
}{
{
desc: "nil buffer, malformed packet",
err: ErrInvalidPacket,
},
{
desc: "empty buffer, malformed packet",
buf: []byte{},
err: ErrInvalidPacket,
},
{
desc: "length 1 buffer, malformed packet",
buf: []byte{0},
err: ErrInvalidPacket,
},
{
desc: "length 3 buffer, malformed packet",
buf: []byte{0, 0, 0},
err: ErrInvalidPacket,
},
{
desc: "invalid options in packet",
buf: []byte{0, 0, 0, 0, 0, 1, 0, 1},
err: ErrInvalidPacket,
},
{
desc: "length 4 buffer, OK",
buf: []byte{0, 0, 0, 0},
packet: &Packet{
MessageType: 0,
TransactionID: [3]byte{0, 0, 0},
Options: make(Options),
},
},
{
desc: "Solicit, [1 2 3] transaction ID, OK",
buf: []byte{1, 1, 2, 3},
packet: &Packet{
MessageType: MessageTypeSolicit,
TransactionID: [3]byte{1, 2, 3},
Options: make(Options),
},
},
{
desc: "Solicit, [2 3 4] transaction ID, option client ID [0 1], OK",
buf: []byte{1, 2, 3, 4, 0, 1, 0, 2, 0, 1},
packet: &Packet{
MessageType: MessageTypeSolicit,
TransactionID: [3]byte{2, 3, 4},
Options: Options{
OptionClientID: [][]byte{{0, 1}},
},
},
},
}
for i, tt := range tests {
p := new(Packet)
if err := p.UnmarshalBinary(tt.buf); err != nil {
if want, got := tt.err, err; want != got {
t.Fatalf("[%02d] test %q, unexpected error: %v != %v",
i, tt.desc, want, got)
}
continue
}
if want, got := tt.packet, p; !reflect.DeepEqual(want, got) {
t.Fatalf("[%02d] test %q, unexpected packet:\n- want: %v\n- got: %v",
i, tt.desc, want, got)
}
}
}
|
