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// Copyright (C) 2019-2024 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package network
import (
"bytes"
"testing"
"github.com/stretchr/testify/require"
"github.com/algorand/go-algorand/protocol"
"github.com/algorand/go-algorand/test/partitiontest"
)
func makeSignedTxnMsg() IncomingMessage {
return IncomingMessage{Sender: &wsPeer{}, Tag: protocol.TxnTag, Data: []byte("I am a signed transaction")}
}
func makeVoteMsg() IncomingMessage {
return IncomingMessage{Sender: &wsPeer{}, Tag: protocol.AgreementVoteTag, Data: []byte("I am an agreement vote message")}
}
// Message handler that remembers the last message it handled
type testHandler struct {
msg *IncomingMessage
}
func (th *testHandler) Reset() {
th.msg = nil
}
func (th *testHandler) Handle(msg IncomingMessage) OutgoingMessage {
th.msg = &msg
return OutgoingMessage{}
}
func (th *testHandler) SawMsg(msg IncomingMessage) bool {
if th.msg == nil {
return false
}
return bytes.Equal(th.msg.Data, msg.Data) && (th.msg.Sender == msg.Sender)
}
func TestMultiplexer(t *testing.T) {
partitiontest.PartitionTest(t)
m := MakeMultiplexer()
handler := &testHandler{}
// Handler shouldn't be called before it is registered
msg1 := makeSignedTxnMsg()
_ = m.Handle(msg1)
if handler.SawMsg(msg1) {
t.Errorf("Handler was called before we registered it")
}
// Registering our handler should succeed
m.RegisterHandlers([]TaggedMessageHandler{{protocol.TxnTag, handler}})
// Can't register two handlers for the same typetag
panicked := false
func() {
defer func() {
if r := recover(); r != nil {
panicked = true
}
}()
m := MakeMultiplexer()
m.RegisterHandlers([]TaggedMessageHandler{{protocol.TxnTag, handler}, {protocol.TxnTag, handler}})
}()
require.True(t, panicked)
panicked = false
func() {
defer func() {
if r := recover(); r != nil {
panicked = true
}
}()
m := MakeMultiplexer()
m.RegisterHandlers([]TaggedMessageHandler{{protocol.TxnTag, handler}})
m.RegisterHandlers([]TaggedMessageHandler{{protocol.TxnTag, handler}})
}()
require.True(t, panicked)
// Handler should be called on SignedTxn messages now that we've registered it
msg2 := makeSignedTxnMsg()
_ = m.Handle(msg2)
if !handler.SawMsg(msg2) {
t.Errorf("Handler was not called on a SignedTxn it was registered to handle")
t.Errorf("handledMsg: %v", handler.msg)
t.Errorf("msg2: %v", msg2)
}
handler.Reset()
// Handler should not be called on tags it isn't registered for
msg3 := makeVoteMsg()
_ = m.Handle(msg3)
require.False(t, handler.SawMsg(msg3))
handler.Reset()
// After deregistering, should not get any more incoming messages
m.ClearHandlers([]Tag{})
msg5 := makeSignedTxnMsg()
m.Handle(msg5)
require.False(t, handler.SawMsg(msg5))
handler.Reset()
}
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