// TestMessage tests the Read/WriteMessage and Read/WriteMessageN API.
func TestMessage(t *testing.T) {
pver := btcwire.ProtocolVersion
// Create the various types of messages to test.
// MsgVersion.
addrYou := &net.TCPAddr{IP: net.ParseIP("192.168.0.1"), Port: 8333}
you, err := btcwire.NewNetAddress(addrYou, btcwire.SFNodeNetwork)
if err != nil {
t.Errorf("NewNetAddress: %v", err)
}
you.Timestamp = time.Time{} // Version message has zero value timestamp.
addrMe := &net.TCPAddr{IP: net.ParseIP("127.0.0.1"), Port: 8333}
me, err := btcwire.NewNetAddress(addrMe, btcwire.SFNodeNetwork)
if err != nil {
t.Errorf("NewNetAddress: %v", err)
}
me.Timestamp = time.Time{} // Version message has zero value timestamp.
msgVersion := btcwire.NewMsgVersion(me, you, 123123, "/test:0.0.1/", 0)
msgVerack := btcwire.NewMsgVerAck()
msgGetAddr := btcwire.NewMsgGetAddr()
msgAddr := btcwire.NewMsgAddr()
msgGetBlocks := btcwire.NewMsgGetBlocks(&btcwire.ShaHash{})
msgBlock := &blockOne
msgInv := btcwire.NewMsgInv()
msgGetData := btcwire.NewMsgGetData()
msgNotFound := btcwire.NewMsgNotFound()
msgTx := btcwire.NewMsgTx()
msgPing := btcwire.NewMsgPing(123123)
msgPong := btcwire.NewMsgPong(123123)
msgGetHeaders := btcwire.NewMsgGetHeaders()
msgHeaders := btcwire.NewMsgHeaders()
msgAlert := btcwire.NewMsgAlert("payload", "signature")
msgMemPool := btcwire.NewMsgMemPool()
tests := []struct {
in btcwire.Message // Value to encode
out btcwire.Message // Expected decoded value
pver uint32 // Protocol version for wire encoding
btcnet btcwire.BitcoinNet // Network to use for wire encoding
bytes int // Expected num bytes read/written
}{
{msgVersion, msgVersion, pver, btcwire.MainNet, 121},
{msgVerack, msgVerack, pver, btcwire.MainNet, 24},
{msgGetAddr, msgGetAddr, pver, btcwire.MainNet, 24},
{msgAddr, msgAddr, pver, btcwire.MainNet, 25},
{msgGetBlocks, msgGetBlocks, pver, btcwire.MainNet, 61},
{msgBlock, msgBlock, pver, btcwire.MainNet, 239},
{msgInv, msgInv, pver, btcwire.MainNet, 25},
{msgGetData, msgGetData, pver, btcwire.MainNet, 25},
{msgNotFound, msgNotFound, pver, btcwire.MainNet, 25},
{msgTx, msgTx, pver, btcwire.MainNet, 34},
{msgPing, msgPing, pver, btcwire.MainNet, 32},
{msgPong, msgPong, pver, btcwire.MainNet, 32},
{msgGetHeaders, msgGetHeaders, pver, btcwire.MainNet, 61},
{msgHeaders, msgHeaders, pver, btcwire.MainNet, 25},
{msgAlert, msgAlert, pver, btcwire.MainNet, 42},
{msgMemPool, msgMemPool, pver, btcwire.MainNet, 24},
}
t.Logf("Running %d tests", len(tests))
for i, test := range tests {
// Encode to wire format.
var buf bytes.Buffer
nw, err := btcwire.WriteMessageN(&buf, test.in, test.pver, test.btcnet)
if err != nil {
t.Errorf("WriteMessage #%d error %v", i, err)
continue
}
// Ensure the number of bytes written match the expected value.
if nw != test.bytes {
t.Errorf("WriteMessage #%d unexpected num bytes "+
"written - got %d, want %d", i, nw, test.bytes)
}
// Decode from wire format.
rbuf := bytes.NewBuffer(buf.Bytes())
nr, msg, _, err := btcwire.ReadMessageN(rbuf, test.pver, test.btcnet)
if err != nil {
t.Errorf("ReadMessage #%d error %v, msg %v", i, err,
spew.Sdump(msg))
continue
}
if !reflect.DeepEqual(msg, test.out) {
t.Errorf("ReadMessage #%d\n got: %v want: %v", i,
spew.Sdump(msg), spew.Sdump(test.out))
continue
}
// Ensure the number of bytes read match the expected value.
if nr != test.bytes {
t.Errorf("ReadMessage #%d unexpected num bytes read - "+
"got %d, want %d", i, nr, test.bytes)
}
}
// Do the same thing for Read/WriteMessage, but ignore the bytes since
// they don't return them.
t.Logf("Running %d tests", len(tests))
for i, test := range tests {
// Encode to wire format.
var buf bytes.Buffer
err := btcwire.WriteMessage(&buf, test.in, test.pver, test.btcnet)
if err != nil {
t.Errorf("WriteMessage #%d error %v", i, err)
continue
}
// Decode from wire format.
rbuf := bytes.NewBuffer(buf.Bytes())
msg, _, err := btcwire.ReadMessage(rbuf, test.pver, test.btcnet)
if err != nil {
t.Errorf("ReadMessage #%d error %v, msg %v", i, err,
spew.Sdump(msg))
continue
}
if !reflect.DeepEqual(msg, test.out) {
t.Errorf("ReadMessage #%d\n got: %v want: %v", i,
spew.Sdump(msg), spew.Sdump(test.out))
continue
}
}
}
// TestReadMessageWireErrors performs negative tests against wire decoding into
// concrete messages to confirm error paths work correctly.
func TestReadMessageWireErrors(t *testing.T) {
pver := btcwire.ProtocolVersion
btcnet := btcwire.MainNet
// Ensure message errors are as expected with no function specified.
wantErr := "something bad happened"
testErr := btcwire.MessageError{Description: wantErr}
if testErr.Error() != wantErr {
t.Errorf("MessageError: wrong error - got %v, want %v",
testErr.Error(), wantErr)
}
// Ensure message errors are as expected with a function specified.
wantFunc := "foo"
testErr = btcwire.MessageError{Func: wantFunc, Description: wantErr}
if testErr.Error() != wantFunc+": "+wantErr {
t.Errorf("MessageError: wrong error - got %v, want %v",
testErr.Error(), wantErr)
}
// Wire encoded bytes for main and testnet3 networks magic identifiers.
testNet3Bytes := makeHeader(btcwire.TestNet3, "", 0, 0)
// Wire encoded bytes for a message that exceeds max overall message
// length.
mpl := btcwire.MaxMessagePayload
exceedMaxPayloadBytes := makeHeader(btcnet, "getaddr", mpl+1, 0)
// Wire encoded bytes for a command which is invalid utf-8.
badCommandBytes := makeHeader(btcnet, "bogus", 0, 0)
badCommandBytes[4] = 0x81
// Wire encoded bytes for a command which is valid, but not supported.
unsupportedCommandBytes := makeHeader(btcnet, "bogus", 0, 0)
// Wire encoded bytes for a message which exceeds the max payload for
// a specific message type.
exceedTypePayloadBytes := makeHeader(btcnet, "getaddr", 1, 0)
// Wire encoded bytes for a message which does not deliver the full
// payload according to the header length.
shortPayloadBytes := makeHeader(btcnet, "version", 115, 0)
// Wire encoded bytes for a message with a bad checksum.
badChecksumBytes := makeHeader(btcnet, "version", 2, 0xbeef)
badChecksumBytes = append(badChecksumBytes, []byte{0x0, 0x0}...)
// Wire encoded bytes for a message which has a valid header, but is
// the wrong format. An addr starts with a varint of the number of
// contained in the message. Claim there is two, but don't provide
// them. At the same time, forge the header fields so the message is
// otherwise accurate.
badMessageBytes := makeHeader(btcnet, "addr", 1, 0xeaadc31c)
badMessageBytes = append(badMessageBytes, 0x2)
// Wire encoded bytes for a message which the header claims has 15k
// bytes of data to discard.
discardBytes := makeHeader(btcnet, "bogus", 15*1024, 0)
tests := []struct {
buf []byte // Wire encoding
pver uint32 // Protocol version for wire encoding
btcnet btcwire.BitcoinNet // Bitcoin network for wire encoding
max int // Max size of fixed buffer to induce errors
readErr error // Expected read error
bytes int // Expected num bytes read
}{
// Latest protocol version with intentional read errors.
// Short header.
{
[]byte{},
pver,
btcnet,
0,
io.EOF,
0,
},
// Wrong network. Want MainNet, but giving TestNet3.
{
testNet3Bytes,
pver,
btcnet,
len(testNet3Bytes),
&btcwire.MessageError{},
24,
},
// Exceed max overall message payload length.
{
exceedMaxPayloadBytes,
pver,
btcnet,
len(exceedMaxPayloadBytes),
&btcwire.MessageError{},
24,
},
// Invalid UTF-8 command.
{
badCommandBytes,
pver,
btcnet,
len(badCommandBytes),
&btcwire.MessageError{},
24,
},
// Valid, but unsupported command.
{
unsupportedCommandBytes,
pver,
btcnet,
len(unsupportedCommandBytes),
&btcwire.MessageError{},
24,
},
// Exceed max allowed payload for a message of a specific type.
{
exceedTypePayloadBytes,
pver,
btcnet,
len(exceedTypePayloadBytes),
&btcwire.MessageError{},
24,
},
// Message with a payload shorter than the header indicates.
{
shortPayloadBytes,
pver,
btcnet,
len(shortPayloadBytes),
io.EOF,
24,
},
// Message with a bad checksum.
{
badChecksumBytes,
pver,
btcnet,
len(badChecksumBytes),
&btcwire.MessageError{},
26,
},
// Message with a valid header, but wrong format.
{
badMessageBytes,
pver,
btcnet,
len(badMessageBytes),
io.EOF,
25,
},
// 15k bytes of data to discard.
{
discardBytes,
pver,
btcnet,
len(discardBytes),
&btcwire.MessageError{},
24,
},
}
t.Logf("Running %d tests", len(tests))
for i, test := range tests {
// Decode from wire format.
r := newFixedReader(test.max, test.buf)
nr, _, _, err := btcwire.ReadMessageN(r, test.pver, test.btcnet)
if reflect.TypeOf(err) != reflect.TypeOf(test.readErr) {
t.Errorf("ReadMessage #%d wrong error got: %v <%T>, "+
"want: %T", i, err, err, test.readErr)
continue
}
// Ensure the number of bytes written match the expected value.
if nr != test.bytes {
t.Errorf("ReadMessage #%d unexpected num bytes read - "+
"got %d, want %d", i, nr, test.bytes)
}
// For errors which are not of type btcwire.MessageError, check
// them for equality.
if _, ok := err.(*btcwire.MessageError); !ok {
if err != test.readErr {
t.Errorf("ReadMessage #%d wrong error got: %v <%T>, "+
"want: %v <%T>", i, err, err,
test.readErr, test.readErr)
continue
}
}
}
}