From fcf090eed18de2b0eb27e112808e07242d3c633e Mon Sep 17 00:00:00 2001
From: Woosang Son <woosang.son@linecorp.com>
Date: Mon, 2 Nov 2020 16:38:12 +0900
Subject: [PATCH] test: add async reactor test

---
 p2p/switch_test.go | 124 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)

diff --git a/p2p/switch_test.go b/p2p/switch_test.go
index abb41ce05..0e4a09e57 100644
--- a/p2p/switch_test.go
+++ b/p2p/switch_test.go
@@ -786,3 +786,127 @@ func (book *addrBookMock) RemoveAddress(addr *NetAddress) {
 	delete(book.addrs, addr.String())
 }
 func (book *addrBookMock) Save() {}
+
+type NormalReactor struct {
+	BaseReactor
+	channels []*conn.ChannelDescriptor
+	msgChan chan []byte
+}
+
+func NewNormalReactor(channels []*conn.ChannelDescriptor, async bool, recvBufSize int) *NormalReactor {
+	nr := &NormalReactor{
+		channels:     channels,
+	}
+	nr.BaseReactor = *NewBaseReactor("NormalReactor", nr, async, recvBufSize)
+	nr.msgChan = make(chan []byte)
+	nr.SetLogger(log.TestingLogger())
+	return nr
+}
+
+func (nr *NormalReactor) GetChannels() []*conn.ChannelDescriptor {
+	return nr.channels
+}
+
+func (nr *NormalReactor) AddPeer(peer Peer) {}
+
+func (nr *NormalReactor) RemovePeer(peer Peer, reason interface{}) {}
+
+func (nr *NormalReactor) Receive(chID byte, peer Peer, msgBytes []byte) {
+	nr.msgChan <- msgBytes
+}
+
+type BlockedReactor struct {
+	BaseReactor
+	channels []*conn.ChannelDescriptor
+	waitChan chan int
+}
+
+func NewBlockedReactor(channels []*conn.ChannelDescriptor, async bool, recvBufSize int) *BlockedReactor {
+	br := &BlockedReactor{
+		channels:     channels,
+	}
+	br.BaseReactor = *NewBaseReactor("BlockedReactor", br, async, recvBufSize)
+	br.waitChan = make(chan int, 1)
+	br.SetLogger(log.TestingLogger())
+	return br
+}
+
+func (br *BlockedReactor) GetChannels() []*conn.ChannelDescriptor {
+	return br.channels
+}
+
+func (br *BlockedReactor) AddPeer(peer Peer) {}
+
+func (br *BlockedReactor) RemovePeer(peer Peer, reason interface{}) {}
+
+func (br *BlockedReactor) Receive(chID byte, peer Peer, msgBytes []byte) {
+	<-br.waitChan
+}
+
+const (
+	reactorNameNormal = "normal"
+	reactorNameBlocked = "blocked"
+)
+
+func TestSyncReactor(t *testing.T) {
+	cfg.RecvAsync = false
+	s1, s2 := MakeSwitchPair(t, getInitSwitchFunc(0))
+	defer s1.Stop()
+	defer s2.Stop()
+
+	normalReactor := s2.Reactor(reactorNameNormal).(*NormalReactor)
+	blockedReactor := s2.Reactor(reactorNameBlocked).(*BlockedReactor)
+	s1.Broadcast(0x01, []byte{1}) // the message for blocked reactor is first
+	time.Sleep(time.Millisecond * 200) // to make order among messages
+	s1.Broadcast(0x00, []byte{0}) // and then second message is for normal reactor
+
+	select {
+	case <-normalReactor.msgChan:
+		assert.Fail(t, "blocked reactor is not blocked")
+	case <- time.After(time.Second * 1):
+		assert.True(t, true, "blocked reactor is blocked: OK")
+	}
+
+	blockedReactor.waitChan <- 1 // release blocked reactor
+	select {
+	case msg := <-normalReactor.msgChan:
+		assert.True(t, bytes.Equal(msg, []byte{0}))
+	}
+}
+
+func TestAsyncReactor(t *testing.T) {
+	cfg.RecvAsync = true
+	s1, s2 := MakeSwitchPair(t, getInitSwitchFunc(1))
+	defer s1.Stop()
+	defer s2.Stop()
+
+	normalReactor := s2.Reactor(reactorNameNormal).(*NormalReactor)
+	s1.Broadcast(0x01, []byte{1}) // the message for blocked reactor is first
+	time.Sleep(time.Millisecond * 200) // to make order among messages
+	s1.Broadcast(0x00, []byte{0}) // and then second message is for normal reactor
+
+	select {
+	case msg := <-normalReactor.msgChan:
+		assert.True(t, bytes.Equal(msg, []byte{0}))
+	case <- time.After(time.Second * 1):
+		assert.Fail(t, "blocked reactor is blocked")
+	}
+}
+
+func getInitSwitchFunc(bufSize int) func(int, *Switch, *config.P2PConfig) *Switch {
+	return func(i int, sw *Switch, config *config.P2PConfig) *Switch {
+		sw.SetAddrBook(&addrBookMock{
+			addrs:    make(map[string]struct{}),
+			ourAddrs: make(map[string]struct{})})
+
+		// Make two reactors of two channels each
+		sw.AddReactor(reactorNameNormal, NewNormalReactor([]*conn.ChannelDescriptor{
+			{ID: byte(0x00), Priority: 10},
+		}, config.RecvAsync, bufSize))
+		sw.AddReactor(reactorNameBlocked, NewBlockedReactor([]*conn.ChannelDescriptor{
+			{ID: byte(0x01), Priority: 10},
+		}, config.RecvAsync, bufSize))
+
+		return sw
+	}
+}
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