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package consensus
import (
"context"
"fmt"
"os"
"runtime/pprof"
"sync"
"testing"
"time"
"github.com/tendermint/abci/example/dummy"
cfg "github.com/tendermint/tendermint/config"
"github.com/tendermint/tendermint/p2p"
"github.com/tendermint/tendermint/types"
"github.com/stretchr/testify/require"
)
func init() {
config = ResetConfig("consensus_reactor_test")
}
//----------------------------------------------
// in-process testnets
func startConsensusNet(t *testing.T, css []*ConsensusState, N int) ([]*ConsensusReactor, []chan interface{}, []*types.EventBus) {
reactors := make([]*ConsensusReactor, N)
eventChans := make([]chan interface{}, N)
eventBuses := make([]*types.EventBus, N)
logger := consensusLogger()
for i := 0; i < N; i++ {
/*thisLogger, err := tmflags.ParseLogLevel("consensus:info,*:error", logger, "info")
if err != nil { t.Fatal(err)}*/
thisLogger := logger
reactors[i] = NewConsensusReactor(css[i], true) // so we dont start the consensus states
reactors[i].conS.SetLogger(thisLogger.With("validator", i))
reactors[i].SetLogger(thisLogger.With("validator", i))
eventBuses[i] = types.NewEventBus()
eventBuses[i].SetLogger(thisLogger.With("module", "events", "validator", i))
_, err := eventBuses[i].Start()
require.NoError(t, err)
reactors[i].SetEventBus(eventBuses[i])
eventChans[i] = make(chan interface{}, 1)
err = eventBuses[i].Subscribe(context.Background(), testSubscriber, types.EventQueryNewBlock, eventChans[i])
require.NoError(t, err)
}
// make connected switches and start all reactors
p2p.MakeConnectedSwitches(config.P2P, N, func(i int, s *p2p.Switch) *p2p.Switch {
s.AddReactor("CONSENSUS", reactors[i])
return s
}, p2p.Connect2Switches)
// now that everyone is connected, start the state machines
// If we started the state machines before everyone was connected,
// we'd block when the cs fires NewBlockEvent and the peers are trying to start their reactors
// TODO: is this still true with new pubsub?
for i := 0; i < N; i++ {
s := reactors[i].conS.GetState()
reactors[i].SwitchToConsensus(s, 0)
}
return reactors, eventChans, eventBuses
}
func stopConsensusNet(reactors []*ConsensusReactor, eventBuses []*types.EventBus) {
for _, r := range reactors {
r.Switch.Stop()
}
for _, b := range eventBuses {
b.Stop()
}
}
// Ensure a testnet makes blocks
func TestReactor(t *testing.T) {
N := 4
css := randConsensusNet(N, "consensus_reactor_test", newMockTickerFunc(true), newCounter)
reactors, eventChans, eventBuses := startConsensusNet(t, css, N)
defer stopConsensusNet(reactors, eventBuses)
// wait till everyone makes the first new block
timeoutWaitGroup(t, N, func(wg *sync.WaitGroup, j int) {
<-eventChans[j]
wg.Done()
}, css)
}
// Ensure a testnet sends proposal heartbeats and makes blocks when there are txs
func TestReactorProposalHeartbeats(t *testing.T) {
N := 4
css := randConsensusNet(N, "consensus_reactor_test", newMockTickerFunc(true), newCounter,
func(c *cfg.Config) {
c.Consensus.CreateEmptyBlocks = false
})
reactors, eventChans, eventBuses := startConsensusNet(t, css, N)
defer stopConsensusNet(reactors, eventBuses)
heartbeatChans := make([]chan interface{}, N)
var err error
for i := 0; i < N; i++ {
heartbeatChans[i] = make(chan interface{}, 1)
err = eventBuses[i].Subscribe(context.Background(), testSubscriber, types.EventQueryProposalHeartbeat, heartbeatChans[i])
require.NoError(t, err)
}
// wait till everyone sends a proposal heartbeat
timeoutWaitGroup(t, N, func(wg *sync.WaitGroup, j int) {
<-heartbeatChans[j]
wg.Done()
}, css)
// send a tx
if err := css[3].mempool.CheckTx([]byte{1, 2, 3}, nil); err != nil {
t.Fatal(err)
}
// wait till everyone makes the first new block
timeoutWaitGroup(t, N, func(wg *sync.WaitGroup, j int) {
<-eventChans[j]
wg.Done()
}, css)
}
//-------------------------------------------------------------
// ensure we can make blocks despite cycling a validator set
func TestVotingPowerChange(t *testing.T) {
nVals := 4
css := randConsensusNet(nVals, "consensus_voting_power_changes_test", newMockTickerFunc(true), newPersistentDummy)
reactors, eventChans, eventBuses := startConsensusNet(t, css, nVals)
defer stopConsensusNet(reactors, eventBuses)
// map of active validators
activeVals := make(map[string]struct{})
for i := 0; i < nVals; i++ {
activeVals[string(css[i].privValidator.GetAddress())] = struct{}{}
}
// wait till everyone makes block 1
timeoutWaitGroup(t, nVals, func(wg *sync.WaitGroup, j int) {
<-eventChans[j]
wg.Done()
}, css)
//---------------------------------------------------------------------------
t.Log("---------------------------- Testing changing the voting power of one validator a few times")
val1PubKey := css[0].privValidator.GetPubKey()
updateValidatorTx := dummy.MakeValSetChangeTx(val1PubKey.Bytes(), 25)
previousTotalVotingPower := css[0].GetRoundState().LastValidators.TotalVotingPower()
waitForAndValidateBlock(t, nVals, activeVals, eventChans, css, updateValidatorTx)
waitForAndValidateBlock(t, nVals, activeVals, eventChans, css)
waitForAndValidateBlock(t, nVals, activeVals, eventChans, css)
waitForAndValidateBlock(t, nVals, activeVals, eventChans, css)
if css[0].GetRoundState().LastValidators.TotalVotingPower() == previousTotalVotingPower {
t.Fatalf("expected voting power to change (before: %d, after: %d)", previousTotalVotingPower, css[0].GetRoundState().LastValidators.TotalVotingPower())
}
updateValidatorTx = dummy.MakeValSetChangeTx(val1PubKey.Bytes(), 2)
previousTotalVotingPower = css[0].GetRoundState().LastValidators.TotalVotingPower()
waitForAndValidateBlock(t, nVals, activeVals, eventChans, css, updateValidatorTx)
waitForAndValidateBlock(t, nVals, activeVals, eventChans, css)
waitForAndValidateBlock(t, nVals, activeVals, eventChans, css)
waitForAndValidateBlock(t, nVals, activeVals, eventChans, css)
if css[0].GetRoundState().LastValidators.TotalVotingPower() == previousTotalVotingPower {
t.Fatalf("expected voting power to change (before: %d, after: %d)", previousTotalVotingPower, css[0].GetRoundState().LastValidators.TotalVotingPower())
}
updateValidatorTx = dummy.MakeValSetChangeTx(val1PubKey.Bytes(), 100)
previousTotalVotingPower = css[0].GetRoundState().LastValidators.TotalVotingPower()
waitForAndValidateBlock(t, nVals, activeVals, eventChans, css, updateValidatorTx)
waitForAndValidateBlock(t, nVals, activeVals, eventChans, css)
waitForAndValidateBlock(t, nVals, activeVals, eventChans, css)
waitForAndValidateBlock(t, nVals, activeVals, eventChans, css)
if css[0].GetRoundState().LastValidators.TotalVotingPower() == previousTotalVotingPower {
t.Fatalf("expected voting power to change (before: %d, after: %d)", previousTotalVotingPower, css[0].GetRoundState().LastValidators.TotalVotingPower())
}
}
func TestValidatorSetChanges(t *testing.T) {
nPeers := 7
nVals := 4
css := randConsensusNetWithPeers(nVals, nPeers, "consensus_val_set_changes_test", newMockTickerFunc(true), newPersistentDummy)
reactors, eventChans, eventBuses := startConsensusNet(t, css, nPeers)
defer stopConsensusNet(reactors, eventBuses)
// map of active validators
activeVals := make(map[string]struct{})
for i := 0; i < nVals; i++ {
activeVals[string(css[i].privValidator.GetAddress())] = struct{}{}
}
// wait till everyone makes block 1
timeoutWaitGroup(t, nPeers, func(wg *sync.WaitGroup, j int) {
<-eventChans[j]
wg.Done()
}, css)
//---------------------------------------------------------------------------
t.Log("---------------------------- Testing adding one validator")
newValidatorPubKey1 := css[nVals].privValidator.GetPubKey()
newValidatorTx1 := dummy.MakeValSetChangeTx(newValidatorPubKey1.Bytes(), uint64(testMinPower))
// wait till everyone makes block 2
// ensure the commit includes all validators
// send newValTx to change vals in block 3
waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css, newValidatorTx1)
// wait till everyone makes block 3.
// it includes the commit for block 2, which is by the original validator set
waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css)
// wait till everyone makes block 4.
// it includes the commit for block 3, which is by the original validator set
waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css)
// the commits for block 4 should be with the updated validator set
activeVals[string(newValidatorPubKey1.Address())] = struct{}{}
// wait till everyone makes block 5
// it includes the commit for block 4, which should have the updated validator set
waitForBlockWithUpdatedValsAndValidateIt(t, nPeers, activeVals, eventChans, css)
//---------------------------------------------------------------------------
t.Log("---------------------------- Testing changing the voting power of one validator")
updateValidatorPubKey1 := css[nVals].privValidator.GetPubKey()
updateValidatorTx1 := dummy.MakeValSetChangeTx(updateValidatorPubKey1.Bytes(), 25)
previousTotalVotingPower := css[nVals].GetRoundState().LastValidators.TotalVotingPower()
waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css, updateValidatorTx1)
waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css)
waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css)
waitForBlockWithUpdatedValsAndValidateIt(t, nPeers, activeVals, eventChans, css)
if css[nVals].GetRoundState().LastValidators.TotalVotingPower() == previousTotalVotingPower {
t.Errorf("expected voting power to change (before: %d, after: %d)", previousTotalVotingPower, css[nVals].GetRoundState().LastValidators.TotalVotingPower())
}
//---------------------------------------------------------------------------
t.Log("---------------------------- Testing adding two validators at once")
newValidatorPubKey2 := css[nVals+1].privValidator.GetPubKey()
newValidatorTx2 := dummy.MakeValSetChangeTx(newValidatorPubKey2.Bytes(), uint64(testMinPower))
newValidatorPubKey3 := css[nVals+2].privValidator.GetPubKey()
newValidatorTx3 := dummy.MakeValSetChangeTx(newValidatorPubKey3.Bytes(), uint64(testMinPower))
waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css, newValidatorTx2, newValidatorTx3)
waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css)
waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css)
activeVals[string(newValidatorPubKey2.Address())] = struct{}{}
activeVals[string(newValidatorPubKey3.Address())] = struct{}{}
waitForBlockWithUpdatedValsAndValidateIt(t, nPeers, activeVals, eventChans, css)
//---------------------------------------------------------------------------
t.Log("---------------------------- Testing removing two validators at once")
removeValidatorTx2 := dummy.MakeValSetChangeTx(newValidatorPubKey2.Bytes(), 0)
removeValidatorTx3 := dummy.MakeValSetChangeTx(newValidatorPubKey3.Bytes(), 0)
waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css, removeValidatorTx2, removeValidatorTx3)
waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css)
waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css)
delete(activeVals, string(newValidatorPubKey2.Address()))
delete(activeVals, string(newValidatorPubKey3.Address()))
waitForBlockWithUpdatedValsAndValidateIt(t, nPeers, activeVals, eventChans, css)
}
// Check we can make blocks with skip_timeout_commit=false
func TestReactorWithTimeoutCommit(t *testing.T) {
N := 4
css := randConsensusNet(N, "consensus_reactor_with_timeout_commit_test", newMockTickerFunc(false), newCounter)
// override default SkipTimeoutCommit == true for tests
for i := 0; i < N; i++ {
css[i].config.SkipTimeoutCommit = false
}
reactors, eventChans, eventBuses := startConsensusNet(t, css, N-1)
defer stopConsensusNet(reactors, eventBuses)
// wait till everyone makes the first new block
timeoutWaitGroup(t, N-1, func(wg *sync.WaitGroup, j int) {
<-eventChans[j]
wg.Done()
}, css)
}
func waitForAndValidateBlock(t *testing.T, n int, activeVals map[string]struct{}, eventChans []chan interface{}, css []*ConsensusState, txs ...[]byte) {
timeoutWaitGroup(t, n, func(wg *sync.WaitGroup, j int) {
defer wg.Done()
newBlockI, ok := <-eventChans[j]
if !ok {
return
}
newBlock := newBlockI.(types.TMEventData).Unwrap().(types.EventDataNewBlock).Block
t.Logf("Got block height=%v validator=%v", newBlock.Height, j)
err := validateBlock(newBlock, activeVals)
if err != nil {
t.Fatal(err)
}
for _, tx := range txs {
if err = css[j].mempool.CheckTx(tx, nil); err != nil {
t.Fatal(err)
}
}
}, css)
}
func waitForBlockWithUpdatedValsAndValidateIt(t *testing.T, n int, updatedVals map[string]struct{}, eventChans []chan interface{}, css []*ConsensusState) {
timeoutWaitGroup(t, n, func(wg *sync.WaitGroup, j int) {
defer wg.Done()
var newBlock *types.Block
LOOP:
for {
newBlockI, ok := <-eventChans[j]
if !ok {
return
}
newBlock = newBlockI.(types.TMEventData).Unwrap().(types.EventDataNewBlock).Block
if newBlock.LastCommit.Size() == len(updatedVals) {
t.Logf("Block with new validators height=%v validator=%v", newBlock.Height, j)
break LOOP
} else {
t.Logf("Block with no new validators height=%v validator=%v. Skipping...", newBlock.Height, j)
}
}
err := validateBlock(newBlock, updatedVals)
if err != nil {
t.Fatal(err)
}
}, css)
}
// expects high synchrony!
func validateBlock(block *types.Block, activeVals map[string]struct{}) error {
if block.LastCommit.Size() != len(activeVals) {
return fmt.Errorf("Commit size doesn't match number of active validators. Got %d, expected %d", block.LastCommit.Size(), len(activeVals))
}
for _, vote := range block.LastCommit.Precommits {
if _, ok := activeVals[string(vote.ValidatorAddress)]; !ok {
return fmt.Errorf("Found vote for unactive validator %X", vote.ValidatorAddress)
}
}
return nil
}
func timeoutWaitGroup(t *testing.T, n int, f func(*sync.WaitGroup, int), css []*ConsensusState) {
wg := new(sync.WaitGroup)
wg.Add(n)
for i := 0; i < n; i++ {
go f(wg, i)
}
done := make(chan struct{})
go func() {
wg.Wait()
close(done)
}()
// we're running many nodes in-process, possibly in in a virtual machine,
// and spewing debug messages - making a block could take a while,
timeout := time.Second * 60
select {
case <-done:
case <-time.After(timeout):
for i, cs := range css {
t.Log("#################")
t.Log("Validator", i)
t.Log(cs.GetRoundState())
t.Log("")
}
pprof.Lookup("goroutine").WriteTo(os.Stdout, 1)
panic("Timed out waiting for all validators to commit a block")
}
}