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340 lines
13 KiB
340 lines
13 KiB
package consensus
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import (
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"fmt"
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"sync"
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"testing"
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"time"
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"github.com/tendermint/abci/example/dummy"
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"github.com/tendermint/tmlibs/events"
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cfg "github.com/tendermint/tendermint/config"
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"github.com/tendermint/tendermint/p2p"
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"github.com/tendermint/tendermint/types"
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)
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func init() {
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config = ResetConfig("consensus_reactor_test")
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}
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//----------------------------------------------
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// in-process testnets
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func startConsensusNet(t *testing.T, css []*ConsensusState, N int, subscribeEventRespond bool) ([]*ConsensusReactor, []chan interface{}) {
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reactors := make([]*ConsensusReactor, N)
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eventChans := make([]chan interface{}, N)
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logger := consensusLogger()
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for i := 0; i < N; i++ {
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reactors[i] = NewConsensusReactor(css[i], true) // so we dont start the consensus states
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reactors[i].SetLogger(logger.With("validator", i))
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eventSwitch := events.NewEventSwitch()
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eventSwitch.SetLogger(logger.With("module", "events", "validator", i))
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_, err := eventSwitch.Start()
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if err != nil {
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t.Fatalf("Failed to start switch: %v", err)
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}
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reactors[i].SetEventSwitch(eventSwitch)
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if subscribeEventRespond {
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eventChans[i] = subscribeToEventRespond(eventSwitch, "tester", types.EventStringNewBlock())
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} else {
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eventChans[i] = subscribeToEvent(eventSwitch, "tester", types.EventStringNewBlock(), 1)
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}
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}
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// make connected switches and start all reactors
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p2p.MakeConnectedSwitches(config.P2P, N, func(i int, s *p2p.Switch) *p2p.Switch {
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s.AddReactor("CONSENSUS", reactors[i])
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return s
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}, p2p.Connect2Switches)
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// now that everyone is connected, start the state machines
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// If we started the state machines before everyone was connected,
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// we'd block when the cs fires NewBlockEvent and the peers are trying to start their reactors
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for i := 0; i < N; i++ {
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s := reactors[i].conS.GetState()
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reactors[i].SwitchToConsensus(s, 0)
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}
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return reactors, eventChans
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}
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func stopConsensusNet(reactors []*ConsensusReactor) {
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for _, r := range reactors {
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r.Switch.Stop()
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}
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}
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// Ensure a testnet makes blocks
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func TestReactor(t *testing.T) {
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N := 4
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css := randConsensusNet(N, "consensus_reactor_test", newMockTickerFunc(true), newCounter)
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reactors, eventChans := startConsensusNet(t, css, N, false)
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defer stopConsensusNet(reactors)
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// wait till everyone makes the first new block
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timeoutWaitGroup(t, N, func(wg *sync.WaitGroup, j int) {
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<-eventChans[j]
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wg.Done()
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}, css)
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}
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// Ensure a testnet sends proposal heartbeats and makes blocks when there are txs
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func TestReactorProposalHeartbeats(t *testing.T) {
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N := 4
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css := randConsensusNet(N, "consensus_reactor_test", newMockTickerFunc(true), newCounter,
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func(c *cfg.Config) {
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c.Consensus.CreateEmptyBlocks = false
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})
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reactors, eventChans := startConsensusNet(t, css, N, false)
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defer stopConsensusNet(reactors)
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heartbeatChans := make([]chan interface{}, N)
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for i := 0; i < N; i++ {
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heartbeatChans[i] = subscribeToEvent(css[i].evsw, "tester", types.EventStringProposalHeartbeat(), 1)
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}
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// wait till everyone sends a proposal heartbeat
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timeoutWaitGroup(t, N, func(wg *sync.WaitGroup, j int) {
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<-heartbeatChans[j]
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wg.Done()
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}, css)
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// send a tx
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css[3].mempool.CheckTx([]byte{1, 2, 3}, nil)
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// wait till everyone makes the first new block
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timeoutWaitGroup(t, N, func(wg *sync.WaitGroup, j int) {
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<-eventChans[j]
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wg.Done()
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}, css)
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}
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//-------------------------------------------------------------
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// ensure we can make blocks despite cycling a validator set
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func TestVotingPowerChange(t *testing.T) {
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nVals := 4
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css := randConsensusNet(nVals, "consensus_voting_power_changes_test", newMockTickerFunc(true), newPersistentDummy)
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reactors, eventChans := startConsensusNet(t, css, nVals, true)
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defer stopConsensusNet(reactors)
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// map of active validators
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activeVals := make(map[string]struct{})
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for i := 0; i < nVals; i++ {
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activeVals[string(css[i].privValidator.GetAddress())] = struct{}{}
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}
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// wait till everyone makes block 1
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timeoutWaitGroup(t, nVals, func(wg *sync.WaitGroup, j int) {
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<-eventChans[j]
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eventChans[j] <- struct{}{}
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wg.Done()
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}, css)
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//---------------------------------------------------------------------------
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t.Log("---------------------------- Testing changing the voting power of one validator a few times")
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val1PubKey := css[0].privValidator.GetPubKey()
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updateValidatorTx := dummy.MakeValSetChangeTx(val1PubKey.Bytes(), 25)
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previousTotalVotingPower := css[0].GetRoundState().LastValidators.TotalVotingPower()
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waitForAndValidateBlock(t, nVals, activeVals, eventChans, css, updateValidatorTx)
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waitForAndValidateBlock(t, nVals, activeVals, eventChans, css)
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waitForAndValidateBlock(t, nVals, activeVals, eventChans, css)
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waitForAndValidateBlock(t, nVals, activeVals, eventChans, css)
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if css[0].GetRoundState().LastValidators.TotalVotingPower() == previousTotalVotingPower {
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t.Fatalf("expected voting power to change (before: %d, after: %d)", previousTotalVotingPower, css[0].GetRoundState().LastValidators.TotalVotingPower())
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}
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updateValidatorTx = dummy.MakeValSetChangeTx(val1PubKey.Bytes(), 2)
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previousTotalVotingPower = css[0].GetRoundState().LastValidators.TotalVotingPower()
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waitForAndValidateBlock(t, nVals, activeVals, eventChans, css, updateValidatorTx)
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waitForAndValidateBlock(t, nVals, activeVals, eventChans, css)
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waitForAndValidateBlock(t, nVals, activeVals, eventChans, css)
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waitForAndValidateBlock(t, nVals, activeVals, eventChans, css)
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if css[0].GetRoundState().LastValidators.TotalVotingPower() == previousTotalVotingPower {
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t.Fatalf("expected voting power to change (before: %d, after: %d)", previousTotalVotingPower, css[0].GetRoundState().LastValidators.TotalVotingPower())
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}
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updateValidatorTx = dummy.MakeValSetChangeTx(val1PubKey.Bytes(), 100)
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previousTotalVotingPower = css[0].GetRoundState().LastValidators.TotalVotingPower()
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waitForAndValidateBlock(t, nVals, activeVals, eventChans, css, updateValidatorTx)
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waitForAndValidateBlock(t, nVals, activeVals, eventChans, css)
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waitForAndValidateBlock(t, nVals, activeVals, eventChans, css)
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waitForAndValidateBlock(t, nVals, activeVals, eventChans, css)
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if css[0].GetRoundState().LastValidators.TotalVotingPower() == previousTotalVotingPower {
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t.Fatalf("expected voting power to change (before: %d, after: %d)", previousTotalVotingPower, css[0].GetRoundState().LastValidators.TotalVotingPower())
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}
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}
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func TestValidatorSetChanges(t *testing.T) {
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nPeers := 7
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nVals := 4
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css := randConsensusNetWithPeers(nVals, nPeers, "consensus_val_set_changes_test", newMockTickerFunc(true), newPersistentDummy)
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reactors, eventChans := startConsensusNet(t, css, nPeers, true)
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defer stopConsensusNet(reactors)
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// map of active validators
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activeVals := make(map[string]struct{})
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for i := 0; i < nVals; i++ {
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activeVals[string(css[i].privValidator.GetAddress())] = struct{}{}
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}
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// wait till everyone makes block 1
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timeoutWaitGroup(t, nPeers, func(wg *sync.WaitGroup, j int) {
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<-eventChans[j]
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eventChans[j] <- struct{}{}
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wg.Done()
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}, css)
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//---------------------------------------------------------------------------
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t.Log("---------------------------- Testing adding one validator")
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newValidatorPubKey1 := css[nVals].privValidator.GetPubKey()
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newValidatorTx1 := dummy.MakeValSetChangeTx(newValidatorPubKey1.Bytes(), uint64(testMinPower))
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// wait till everyone makes block 2
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// ensure the commit includes all validators
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// send newValTx to change vals in block 3
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waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css, newValidatorTx1)
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// wait till everyone makes block 3.
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// it includes the commit for block 2, which is by the original validator set
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waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css)
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// wait till everyone makes block 4.
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// it includes the commit for block 3, which is by the original validator set
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waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css)
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// the commits for block 4 should be with the updated validator set
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activeVals[string(newValidatorPubKey1.Address())] = struct{}{}
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// wait till everyone makes block 5
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// it includes the commit for block 4, which should have the updated validator set
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waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css)
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//---------------------------------------------------------------------------
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t.Log("---------------------------- Testing changing the voting power of one validator")
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updateValidatorPubKey1 := css[nVals].privValidator.GetPubKey()
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updateValidatorTx1 := dummy.MakeValSetChangeTx(updateValidatorPubKey1.Bytes(), 25)
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previousTotalVotingPower := css[nVals].GetRoundState().LastValidators.TotalVotingPower()
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waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css, updateValidatorTx1)
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waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css)
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waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css)
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waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css)
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if css[nVals].GetRoundState().LastValidators.TotalVotingPower() == previousTotalVotingPower {
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t.Errorf("expected voting power to change (before: %d, after: %d)", previousTotalVotingPower, css[nVals].GetRoundState().LastValidators.TotalVotingPower())
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}
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//---------------------------------------------------------------------------
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t.Log("---------------------------- Testing adding two validators at once")
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newValidatorPubKey2 := css[nVals+1].privValidator.GetPubKey()
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newValidatorTx2 := dummy.MakeValSetChangeTx(newValidatorPubKey2.Bytes(), uint64(testMinPower))
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newValidatorPubKey3 := css[nVals+2].privValidator.GetPubKey()
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newValidatorTx3 := dummy.MakeValSetChangeTx(newValidatorPubKey3.Bytes(), uint64(testMinPower))
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waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css, newValidatorTx2, newValidatorTx3)
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waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css)
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waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css)
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activeVals[string(newValidatorPubKey2.Address())] = struct{}{}
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activeVals[string(newValidatorPubKey3.Address())] = struct{}{}
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waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css)
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//---------------------------------------------------------------------------
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t.Log("---------------------------- Testing removing two validators at once")
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removeValidatorTx2 := dummy.MakeValSetChangeTx(newValidatorPubKey2.Bytes(), 0)
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removeValidatorTx3 := dummy.MakeValSetChangeTx(newValidatorPubKey3.Bytes(), 0)
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waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css, removeValidatorTx2, removeValidatorTx3)
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waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css)
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waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css)
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delete(activeVals, string(newValidatorPubKey2.Address()))
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delete(activeVals, string(newValidatorPubKey3.Address()))
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waitForAndValidateBlock(t, nPeers, activeVals, eventChans, css)
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}
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// Check we can make blocks with skip_timeout_commit=false
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func TestReactorWithTimeoutCommit(t *testing.T) {
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N := 4
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css := randConsensusNet(N, "consensus_reactor_with_timeout_commit_test", newMockTickerFunc(false), newCounter)
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// override default SkipTimeoutCommit == true for tests
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for i := 0; i < N; i++ {
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css[i].config.SkipTimeoutCommit = false
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}
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reactors, eventChans := startConsensusNet(t, css, N-1, false)
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defer stopConsensusNet(reactors)
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// wait till everyone makes the first new block
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timeoutWaitGroup(t, N-1, func(wg *sync.WaitGroup, j int) {
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<-eventChans[j]
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wg.Done()
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}, css)
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}
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func waitForAndValidateBlock(t *testing.T, n int, activeVals map[string]struct{}, eventChans []chan interface{}, css []*ConsensusState, txs ...[]byte) {
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timeoutWaitGroup(t, n, func(wg *sync.WaitGroup, j int) {
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newBlockI := <-eventChans[j]
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newBlock := newBlockI.(types.TMEventData).Unwrap().(types.EventDataNewBlock).Block
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t.Logf("[WARN] Got block height=%v validator=%v", newBlock.Height, j)
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err := validateBlock(newBlock, activeVals)
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if err != nil {
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t.Fatal(err)
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}
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for _, tx := range txs {
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css[j].mempool.CheckTx(tx, nil)
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}
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eventChans[j] <- struct{}{}
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wg.Done()
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}, css)
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}
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// expects high synchrony!
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func validateBlock(block *types.Block, activeVals map[string]struct{}) error {
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if block.LastCommit.Size() != len(activeVals) {
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return fmt.Errorf("Commit size doesn't match number of active validators. Got %d, expected %d", block.LastCommit.Size(), len(activeVals))
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}
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for _, vote := range block.LastCommit.Precommits {
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if _, ok := activeVals[string(vote.ValidatorAddress)]; !ok {
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return fmt.Errorf("Found vote for unactive validator %X", vote.ValidatorAddress)
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}
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}
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return nil
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}
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func timeoutWaitGroup(t *testing.T, n int, f func(*sync.WaitGroup, int), css []*ConsensusState) {
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wg := new(sync.WaitGroup)
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wg.Add(n)
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for i := 0; i < n; i++ {
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go f(wg, i)
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}
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done := make(chan struct{})
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go func() {
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wg.Wait()
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close(done)
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}()
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select {
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case <-done:
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case <-time.After(time.Second * 10):
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for i, cs := range css {
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fmt.Println("#################")
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fmt.Println("Validator", i)
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fmt.Println(cs.GetRoundState())
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fmt.Println("")
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}
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panic("Timed out waiting for all validators to commit a block")
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}
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}
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