lbcd/wire/msgpong_test.go

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// Copyright (c) 2013-2015 Conformal Systems LLC.
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// Use of this source code is governed by an ISC
// license that can be found in the LICENSE file.
package wire_test
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import (
"bytes"
"io"
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"reflect"
"testing"
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"github.com/btcsuite/btcd/wire"
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"github.com/davecgh/go-spew/spew"
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)
// TestPongLatest tests the MsgPong API against the latest protocol version.
func TestPongLatest(t *testing.T) {
pver := wire.ProtocolVersion
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nonce, err := wire.RandomUint64()
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if err != nil {
t.Errorf("RandomUint64: error generating nonce: %v", err)
}
msg := wire.NewMsgPong(nonce)
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if msg.Nonce != nonce {
t.Errorf("NewMsgPong: wrong nonce - got %v, want %v",
msg.Nonce, nonce)
}
// Ensure the command is expected value.
wantCmd := "pong"
if cmd := msg.Command(); cmd != wantCmd {
t.Errorf("NewMsgPong: wrong command - got %v want %v",
cmd, wantCmd)
}
// Ensure max payload is expected value for latest protocol version.
wantPayload := uint32(8)
maxPayload := msg.MaxPayloadLength(pver)
if maxPayload != wantPayload {
t.Errorf("MaxPayloadLength: wrong max payload length for "+
"protocol version %d - got %v, want %v", pver,
maxPayload, wantPayload)
}
// Test encode with latest protocol version.
var buf bytes.Buffer
err = msg.BtcEncode(&buf, pver)
if err != nil {
t.Errorf("encode of MsgPong failed %v err <%v>", msg, err)
}
// Test decode with latest protocol version.
readmsg := wire.NewMsgPong(0)
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err = readmsg.BtcDecode(&buf, pver)
if err != nil {
t.Errorf("decode of MsgPong failed [%v] err <%v>", buf, err)
}
// Ensure nonce is the same.
if msg.Nonce != readmsg.Nonce {
t.Errorf("Should get same nonce for protocol version %d", pver)
}
return
}
// TestPongBIP0031 tests the MsgPong API against the protocol version
// BIP0031Version.
func TestPongBIP0031(t *testing.T) {
// Use the protocol version just prior to BIP0031Version changes.
pver := wire.BIP0031Version
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nonce, err := wire.RandomUint64()
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if err != nil {
t.Errorf("Error generating nonce: %v", err)
}
msg := wire.NewMsgPong(nonce)
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if msg.Nonce != nonce {
t.Errorf("Should get same nonce back out.")
}
// Ensure max payload is expected value for old protocol version.
size := msg.MaxPayloadLength(pver)
if size != 0 {
t.Errorf("Max length should be 0 for pong protocol version %d.",
pver)
}
// Test encode with old protocol version.
var buf bytes.Buffer
err = msg.BtcEncode(&buf, pver)
if err == nil {
t.Errorf("encode of MsgPong succeeded when it shouldn't have %v",
msg)
}
// Test decode with old protocol version.
readmsg := wire.NewMsgPong(0)
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err = readmsg.BtcDecode(&buf, pver)
if err == nil {
t.Errorf("decode of MsgPong succeeded when it shouldn't have %v",
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spew.Sdump(buf))
}
// Since this protocol version doesn't support pong, make sure the
// nonce didn't get encoded and decoded back out.
if msg.Nonce == readmsg.Nonce {
t.Errorf("Should not get same nonce for protocol version %d", pver)
}
return
}
// TestPongCrossProtocol tests the MsgPong API when encoding with the latest
// protocol version and decoding with BIP0031Version.
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func TestPongCrossProtocol(t *testing.T) {
nonce, err := wire.RandomUint64()
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if err != nil {
t.Errorf("Error generating nonce: %v", err)
}
msg := wire.NewMsgPong(nonce)
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if msg.Nonce != nonce {
t.Errorf("Should get same nonce back out.")
}
// Encode with latest protocol version.
var buf bytes.Buffer
err = msg.BtcEncode(&buf, wire.ProtocolVersion)
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if err != nil {
t.Errorf("encode of MsgPong failed %v err <%v>", msg, err)
}
// Decode with old protocol version.
readmsg := wire.NewMsgPong(0)
err = readmsg.BtcDecode(&buf, wire.BIP0031Version)
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if err == nil {
t.Errorf("encode of MsgPong succeeded when it shouldn't have %v",
msg)
}
// Since one of the protocol versions doesn't support the pong message,
// make sure the nonce didn't get encoded and decoded back out.
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if msg.Nonce == readmsg.Nonce {
t.Error("Should not get same nonce for cross protocol")
}
}
// TestPongWire tests the MsgPong wire encode and decode for various protocol
// versions.
func TestPongWire(t *testing.T) {
tests := []struct {
in wire.MsgPong // Message to encode
out wire.MsgPong // Expected decoded message
buf []byte // Wire encoding
pver uint32 // Protocol version for wire encoding
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}{
// Latest protocol version.
{
wire.MsgPong{Nonce: 123123}, // 0x1e0f3
wire.MsgPong{Nonce: 123123}, // 0x1e0f3
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[]byte{0xf3, 0xe0, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00},
wire.ProtocolVersion,
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},
// Protocol version BIP0031Version+1
{
wire.MsgPong{Nonce: 456456}, // 0x6f708
wire.MsgPong{Nonce: 456456}, // 0x6f708
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[]byte{0x08, 0xf7, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00},
wire.BIP0031Version + 1,
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},
}
t.Logf("Running %d tests", len(tests))
for i, test := range tests {
// Encode the message to wire format.
var buf bytes.Buffer
err := test.in.BtcEncode(&buf, test.pver)
if err != nil {
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t.Errorf("BtcEncode #%d error %v", i, err)
continue
}
if !bytes.Equal(buf.Bytes(), test.buf) {
t.Errorf("BtcEncode #%d\n got: %s want: %s", i,
spew.Sdump(buf.Bytes()), spew.Sdump(test.buf))
continue
}
// Decode the message from wire format.
var msg wire.MsgPong
rbuf := bytes.NewReader(test.buf)
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err = msg.BtcDecode(rbuf, test.pver)
if err != nil {
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t.Errorf("BtcDecode #%d error %v", i, err)
continue
}
if !reflect.DeepEqual(msg, test.out) {
t.Errorf("BtcDecode #%d\n got: %s want: %s", i,
spew.Sdump(msg), spew.Sdump(test.out))
continue
}
}
}
// TestPongWireErrors performs negative tests against wire encode and decode
// of MsgPong to confirm error paths work correctly.
func TestPongWireErrors(t *testing.T) {
pver := wire.ProtocolVersion
pverNoPong := wire.BIP0031Version
wireErr := &wire.MessageError{}
basePong := wire.NewMsgPong(123123) // 0x1e0f3
basePongEncoded := []byte{
0xf3, 0xe0, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
}
tests := []struct {
in *wire.MsgPong // Value to encode
buf []byte // Wire encoding
pver uint32 // Protocol version for wire encoding
max int // Max size of fixed buffer to induce errors
writeErr error // Expected write error
readErr error // Expected read error
}{
// Latest protocol version with intentional read/write errors.
// Force error in nonce.
{basePong, basePongEncoded, pver, 0, io.ErrShortWrite, io.EOF},
// Force error due to unsupported protocol version.
{basePong, basePongEncoded, pverNoPong, 4, wireErr, wireErr},
}
t.Logf("Running %d tests", len(tests))
for i, test := range tests {
// Encode to wire format.
w := newFixedWriter(test.max)
err := test.in.BtcEncode(w, test.pver)
if reflect.TypeOf(err) != reflect.TypeOf(test.writeErr) {
t.Errorf("BtcEncode #%d wrong error got: %v, want: %v",
i, err, test.writeErr)
continue
}
// For errors which are not of type wire.MessageError, check
// them for equality.
if _, ok := err.(*wire.MessageError); !ok {
if err != test.writeErr {
t.Errorf("BtcEncode #%d wrong error got: %v, "+
"want: %v", i, err, test.writeErr)
continue
}
}
// Decode from wire format.
var msg wire.MsgPong
r := newFixedReader(test.max, test.buf)
err = msg.BtcDecode(r, test.pver)
if reflect.TypeOf(err) != reflect.TypeOf(test.readErr) {
t.Errorf("BtcDecode #%d wrong error got: %v, want: %v",
i, err, test.readErr)
continue
}
// For errors which are not of type wire.MessageError, check
// them for equality.
if _, ok := err.(*wire.MessageError); !ok {
if err != test.readErr {
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t.Errorf("BtcDecode #%d wrong error got: %v, "+
"want: %v", i, err, test.readErr)
continue
}
}
}
}