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package mempool
import (
"fmt"
"sync"
"testing"
"time"
"github.com/fortytw2/leaktest"
"github.com/pkg/errors"
"github.com/stretchr/testify/assert"
"github.com/go-kit/kit/log/term"
"github.com/tendermint/tendermint/abci/example/kvstore"
"github.com/tendermint/tendermint/libs/log"
cfg "github.com/tendermint/tendermint/config"
"github.com/tendermint/tendermint/p2p"
"github.com/tendermint/tendermint/proxy"
"github.com/tendermint/tendermint/types"
)
type peerState struct {
height int64
}
func (ps peerState) GetHeight() int64 {
return ps.height
}
// mempoolLogger is a TestingLogger which uses a different
// color for each validator ("validator" key must exist).
func mempoolLogger() log.Logger {
return log.TestingLoggerWithColorFn(func(keyvals ...interface{}) term.FgBgColor {
for i := 0; i < len(keyvals)-1; i += 2 {
if keyvals[i] == "validator" {
return term.FgBgColor{Fg: term.Color(uint8(keyvals[i+1].(int) + 1))}
}
}
return term.FgBgColor{}
})
}
// connect N mempool reactors through N switches
func makeAndConnectMempoolReactors(config *cfg.Config, N int) []*MempoolReactor {
reactors := make([]*MempoolReactor, N)
logger := mempoolLogger()
for i := 0; i < N; i++ {
app := kvstore.NewKVStoreApplication()
cc := proxy.NewLocalClientCreator(app)
mempool, cleanup := newMempoolWithApp(cc)
defer cleanup()
reactors[i] = NewMempoolReactor(config.Mempool, mempool) // so we dont start the consensus states
reactors[i].SetLogger(logger.With("validator", i))
}
p2p.MakeConnectedSwitches(config.P2P, N, func(i int, s *p2p.Switch) *p2p.Switch {
s.AddReactor("MEMPOOL", reactors[i])
return s
}, p2p.Connect2Switches)
return reactors
}
// wait for all txs on all reactors
func waitForTxs(t *testing.T, txs types.Txs, reactors []*MempoolReactor) {
// wait for the txs in all mempools
wg := new(sync.WaitGroup)
for i := 0; i < len(reactors); i++ {
wg.Add(1)
go _waitForTxs(t, wg, txs, i, reactors)
}
done := make(chan struct{})
go func() {
wg.Wait()
close(done)
}()
timer := time.After(TIMEOUT)
select {
case <-timer:
t.Fatal("Timed out waiting for txs")
case <-done:
}
}
// wait for all txs on a single mempool
func _waitForTxs(t *testing.T, wg *sync.WaitGroup, txs types.Txs, reactorIdx int, reactors []*MempoolReactor) {
mempool := reactors[reactorIdx].Mempool
for mempool.Size() != len(txs) {
time.Sleep(time.Millisecond * 100)
}
reapedTxs := mempool.ReapMaxTxs(len(txs))
for i, tx := range txs {
assert.Equal(t, tx, reapedTxs[i], fmt.Sprintf("txs at index %d on reactor %d don't match: %v vs %v", i, reactorIdx, tx, reapedTxs[i]))
}
wg.Done()
}
const (
NUM_TXS = 1000
TIMEOUT = 120 * time.Second // ridiculously high because CircleCI is slow
)
func TestReactorBroadcastTxMessage(t *testing.T) {
config := cfg.TestConfig()
const N = 4
reactors := makeAndConnectMempoolReactors(config, N)
defer func() {
for _, r := range reactors {
r.Stop()
}
}()
for _, r := range reactors {
for _, peer := range r.Switch.Peers().List() {
peer.Set(types.PeerStateKey, peerState{1})
}
}
// send a bunch of txs to the first reactor's mempool
// and wait for them all to be received in the others
txs := checkTxs(t, reactors[0].Mempool, NUM_TXS)
waitForTxs(t, txs, reactors)
}
func TestBroadcastTxForPeerStopsWhenPeerStops(t *testing.T) {
if testing.Short() {
t.Skip("skipping test in short mode.")
}
config := cfg.TestConfig()
const N = 2
reactors := makeAndConnectMempoolReactors(config, N)
defer func() {
for _, r := range reactors {
r.Stop()
}
}()
// stop peer
sw := reactors[1].Switch
sw.StopPeerForError(sw.Peers().List()[0], errors.New("some reason"))
// check that we are not leaking any go-routines
// i.e. broadcastTxRoutine finishes when peer is stopped
leaktest.CheckTimeout(t, 10*time.Second)()
}
func TestBroadcastTxForPeerStopsWhenReactorStops(t *testing.T) {
if testing.Short() {
t.Skip("skipping test in short mode.")
}
config := cfg.TestConfig()
const N = 2
reactors := makeAndConnectMempoolReactors(config, N)
// stop reactors
for _, r := range reactors {
r.Stop()
}
// check that we are not leaking any go-routines
// i.e. broadcastTxRoutine finishes when reactor is stopped
leaktest.CheckTimeout(t, 10*time.Second)()
}