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package conn
import (
"net"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
wire "github.com/tendermint/go-wire"
"github.com/tendermint/tmlibs/log"
)
func createTestMConnection(conn net.Conn) *MConnection {
onReceive := func(chID byte, msgBytes []byte) {
}
onError := func(r interface{}) {
}
c := createMConnectionWithCallbacks(conn, onReceive, onError)
c.SetLogger(log.TestingLogger())
return c
}
func createMConnectionWithCallbacks(conn net.Conn, onReceive func(chID byte, msgBytes []byte), onError func(r interface{})) *MConnection {
chDescs := []*ChannelDescriptor{&ChannelDescriptor{ID: 0x01, Priority: 1, SendQueueCapacity: 1}}
c := NewMConnection(conn, chDescs, onReceive, onError)
c.SetLogger(log.TestingLogger())
return c
}
func TestMConnectionSend(t *testing.T) {
assert, require := assert.New(t), require.New(t)
server, client := NetPipe()
defer server.Close() // nolint: errcheck
defer client.Close() // nolint: errcheck
mconn := createTestMConnection(client)
err := mconn.Start()
require.Nil(err)
defer mconn.Stop()
msg := "Ant-Man"
assert.True(mconn.Send(0x01, msg))
// Note: subsequent Send/TrySend calls could pass because we are reading from
// the send queue in a separate goroutine.
_, err = server.Read(make([]byte, len(msg)))
if err != nil {
t.Error(err)
}
assert.True(mconn.CanSend(0x01))
msg = "Spider-Man"
assert.True(mconn.TrySend(0x01, msg))
_, err = server.Read(make([]byte, len(msg)))
if err != nil {
t.Error(err)
}
assert.False(mconn.CanSend(0x05), "CanSend should return false because channel is unknown")
assert.False(mconn.Send(0x05, "Absorbing Man"), "Send should return false because channel is unknown")
}
func TestMConnectionReceive(t *testing.T) {
assert, require := assert.New(t), require.New(t)
server, client := NetPipe()
defer server.Close() // nolint: errcheck
defer client.Close() // nolint: errcheck
receivedCh := make(chan []byte)
errorsCh := make(chan interface{})
onReceive := func(chID byte, msgBytes []byte) {
receivedCh <- msgBytes
}
onError := func(r interface{}) {
errorsCh <- r
}
mconn1 := createMConnectionWithCallbacks(client, onReceive, onError)
err := mconn1.Start()
require.Nil(err)
defer mconn1.Stop()
mconn2 := createTestMConnection(server)
err = mconn2.Start()
require.Nil(err)
defer mconn2.Stop()
msg := "Cyclops"
assert.True(mconn2.Send(0x01, msg))
select {
case receivedBytes := <-receivedCh:
assert.Equal([]byte(msg), receivedBytes[2:]) // first 3 bytes are internal
case err := <-errorsCh:
t.Fatalf("Expected %s, got %+v", msg, err)
case <-time.After(500 * time.Millisecond):
t.Fatalf("Did not receive %s message in 500ms", msg)
}
}
func TestMConnectionStatus(t *testing.T) {
assert, require := assert.New(t), require.New(t)
server, client := NetPipe()
defer server.Close() // nolint: errcheck
defer client.Close() // nolint: errcheck
mconn := createTestMConnection(client)
err := mconn.Start()
require.Nil(err)
defer mconn.Stop()
status := mconn.Status()
assert.NotNil(status)
assert.Zero(status.Channels[0].SendQueueSize)
}
func TestMConnectionStopsAndReturnsError(t *testing.T) {
assert, require := assert.New(t), require.New(t)
server, client := NetPipe()
defer server.Close() // nolint: errcheck
defer client.Close() // nolint: errcheck
receivedCh := make(chan []byte)
errorsCh := make(chan interface{})
onReceive := func(chID byte, msgBytes []byte) {
receivedCh <- msgBytes
}
onError := func(r interface{}) {
errorsCh <- r
}
mconn := createMConnectionWithCallbacks(client, onReceive, onError)
err := mconn.Start()
require.Nil(err)
defer mconn.Stop()
if err := client.Close(); err != nil {
t.Error(err)
}
select {
case receivedBytes := <-receivedCh:
t.Fatalf("Expected error, got %v", receivedBytes)
case err := <-errorsCh:
assert.NotNil(err)
assert.False(mconn.IsRunning())
case <-time.After(500 * time.Millisecond):
t.Fatal("Did not receive error in 500ms")
}
}
func newClientAndServerConnsForReadErrors(require *require.Assertions, chOnErr chan struct{}) (*MConnection, *MConnection) {
server, client := NetPipe()
onReceive := func(chID byte, msgBytes []byte) {}
onError := func(r interface{}) {}
// create client conn with two channels
chDescs := []*ChannelDescriptor{
{ID: 0x01, Priority: 1, SendQueueCapacity: 1},
{ID: 0x02, Priority: 1, SendQueueCapacity: 1},
}
mconnClient := NewMConnection(client, chDescs, onReceive, onError)
mconnClient.SetLogger(log.TestingLogger().With("module", "client"))
err := mconnClient.Start()
require.Nil(err)
// create server conn with 1 channel
// it fires on chOnErr when there's an error
serverLogger := log.TestingLogger().With("module", "server")
onError = func(r interface{}) {
chOnErr <- struct{}{}
}
mconnServer := createMConnectionWithCallbacks(server, onReceive, onError)
mconnServer.SetLogger(serverLogger)
err = mconnServer.Start()
require.Nil(err)
return mconnClient, mconnServer
}
func expectSend(ch chan struct{}) bool {
after := time.After(time.Second * 5)
select {
case <-ch:
return true
case <-after:
return false
}
}
func TestMConnectionReadErrorBadEncoding(t *testing.T) {
assert, require := assert.New(t), require.New(t)
chOnErr := make(chan struct{})
mconnClient, mconnServer := newClientAndServerConnsForReadErrors(require, chOnErr)
defer mconnClient.Stop()
defer mconnServer.Stop()
client := mconnClient.conn
msg := "Ant-Man"
// send badly encoded msgPacket
var n int
var err error
wire.WriteByte(packetTypeMsg, client, &n, &err)
wire.WriteByteSlice([]byte(msg), client, &n, &err)
assert.True(expectSend(chOnErr), "badly encoded msgPacket")
}
func TestMConnectionReadErrorUnknownChannel(t *testing.T) {
assert, require := assert.New(t), require.New(t)
chOnErr := make(chan struct{})
mconnClient, mconnServer := newClientAndServerConnsForReadErrors(require, chOnErr)
defer mconnClient.Stop()
defer mconnServer.Stop()
msg := "Ant-Man"
// fail to send msg on channel unknown by client
assert.False(mconnClient.Send(0x03, msg))
// send msg on channel unknown by the server.
// should cause an error
assert.True(mconnClient.Send(0x02, msg))
assert.True(expectSend(chOnErr), "unknown channel")
}
func TestMConnectionReadErrorLongMessage(t *testing.T) {
assert, require := assert.New(t), require.New(t)
chOnErr := make(chan struct{})
chOnRcv := make(chan struct{})
mconnClient, mconnServer := newClientAndServerConnsForReadErrors(require, chOnErr)
defer mconnClient.Stop()
defer mconnServer.Stop()
mconnServer.onReceive = func(chID byte, msgBytes []byte) {
chOnRcv <- struct{}{}
}
client := mconnClient.conn
// send msg thats just right
var n int
var err error
packet := msgPacket{
ChannelID: 0x01,
Bytes: make([]byte, mconnClient.config.maxMsgPacketTotalSize()-5),
EOF: 1,
}
writeMsgPacketTo(packet, client, &n, &err)
assert.True(expectSend(chOnRcv), "msg just right")
// send msg thats too long
packet = msgPacket{
ChannelID: 0x01,
Bytes: make([]byte, mconnClient.config.maxMsgPacketTotalSize()-4),
EOF: 1,
}
writeMsgPacketTo(packet, client, &n, &err)
assert.True(expectSend(chOnErr), "msg too long")
}
func TestMConnectionReadErrorUnknownMsgType(t *testing.T) {
assert, require := assert.New(t), require.New(t)
chOnErr := make(chan struct{})
mconnClient, mconnServer := newClientAndServerConnsForReadErrors(require, chOnErr)
defer mconnClient.Stop()
defer mconnServer.Stop()
// send msg with unknown msg type
var n int
var err error
wire.WriteByte(0x04, mconnClient.conn, &n, &err)
assert.True(expectSend(chOnErr), "unknown msg type")
}
func TestMConnectionTrySend(t *testing.T) {
assert, require := assert.New(t), require.New(t)
server, client := NetPipe()
defer server.Close()
defer client.Close()
mconn := createTestMConnection(client)
err := mconn.Start()
require.Nil(err)
defer mconn.Stop()
msg := "Semicolon-Woman"
resultCh := make(chan string, 2)
assert.True(mconn.TrySend(0x01, msg))
server.Read(make([]byte, len(msg)))
assert.True(mconn.CanSend(0x01))
assert.True(mconn.TrySend(0x01, msg))
assert.False(mconn.CanSend(0x01))
go func() {
mconn.TrySend(0x01, msg)
resultCh <- "TrySend"
}()
go func() {
mconn.Send(0x01, msg)
resultCh <- "Send"
}()
assert.False(mconn.CanSend(0x01))
assert.False(mconn.TrySend(0x01, msg))
assert.Equal("TrySend", <-resultCh)
server.Read(make([]byte, len(msg)))
assert.Equal("Send", <-resultCh) // Order constrained by parallel blocking above
}