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170 lines
4.9 KiB
170 lines
4.9 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/tendermint/config/tendermint_test"
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"github.com/tendermint/go-events"
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"github.com/tendermint/go-p2p"
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"github.com/tendermint/tendermint/types"
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"github.com/tendermint/tmsp/example/dummy"
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)
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func init() {
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config = tendermint_test.ResetConfig("consensus_reactor_test")
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}
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//----------------------------------------------
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// in-process testnets
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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)
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reactors := make([]*ConsensusReactor, N)
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eventChans := make([]chan interface{}, N)
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for i := 0; i < N; i++ {
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reactors[i] = NewConsensusReactor(css[i], false)
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eventSwitch := events.NewEventSwitch()
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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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eventChans[i] = subscribeToEvent(eventSwitch, "tester", types.EventStringNewBlock(), 1)
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}
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// make connected switches and start all reactors
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p2p.MakeConnectedSwitches(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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// 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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})
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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 TestValidatorSetChanges(t *testing.T) {
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nPeers := 8
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nVals := 4
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css := randConsensusNetWithPeers(nVals, nPeers)
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reactors := make([]*ConsensusReactor, nPeers)
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eventChans := make([]chan interface{}, nPeers)
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for i := 0; i < nPeers; i++ {
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reactors[i] = NewConsensusReactor(css[i], false)
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eventSwitch := events.NewEventSwitch()
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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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eventChans[i] = subscribeToEventRespond(eventSwitch, "tester", types.EventStringNewBlock())
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}
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p2p.MakeConnectedSwitches(nPeers, 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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// 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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})
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newValidatorPubKey := css[nVals].privValidator.(*types.PrivValidator).PubKey
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newValidatorTx := dummy.MakeValSetChangeTx(newValidatorPubKey.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, newValidatorTx)
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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(newValidatorPubKey.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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// TODO: test more changes!
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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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newBlock := <-eventChans[j]
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err := validateBlock(newBlock.(types.EventDataNewBlock).Block, 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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})
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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)) {
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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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// Make wait into a channel
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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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tick := time.NewTicker(time.Second * 3)
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select {
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case <-done:
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case <-tick.C:
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t.Fatalf("Timed out waiting for all validators to commit a block")
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}
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}
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