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// Copyright 2018 The dexon-consensus Authors
// This file is part of the dexon-consensus library.
//
// The dexon-consensus library is free software: you can redistribute it
// and/or modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation, either version 3 of the License,
// or (at your option) any later version.
//
// The dexon-consensus library is distributed in the hope that it will be
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
// General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the dexon-consensus library. If not, see
// <http://www.gnu.org/licenses/>.
package integration
import (
"sync"
"testing"
"time"
"github.com/dexon-foundation/dexon-consensus/common"
"github.com/dexon-foundation/dexon-consensus/core"
"github.com/dexon-foundation/dexon-consensus/core/blockdb"
"github.com/dexon-foundation/dexon-consensus/core/crypto"
"github.com/dexon-foundation/dexon-consensus/core/test"
"github.com/dexon-foundation/dexon-consensus/core/types"
"github.com/dexon-foundation/dexon-consensus/core/utils"
"github.com/stretchr/testify/suite"
)
// There is no scheduler in these tests, we need to wait a long period to make
// sure these tests are ok.
type ConsensusTestSuite struct {
suite.Suite
}
type node struct {
con *core.Consensus
app *test.App
gov *test.Governance
db blockdb.BlockDatabase
}
func (s *ConsensusTestSuite) setupNodes(
dMoment time.Time,
prvKeys []crypto.PrivateKey,
seedGov *test.Governance) map[types.NodeID]*node {
var (
wg sync.WaitGroup
)
// Setup peer server at transport layer.
server := test.NewFakeTransportServer()
serverChannel, err := server.Host()
s.Require().NoError(err)
// setup nodes.
nodes := make(map[types.NodeID]*node)
wg.Add(len(prvKeys))
for _, k := range prvKeys {
db, err := blockdb.NewMemBackedBlockDB()
s.Require().NoError(err)
// Prepare essential modules: app, gov, db.
networkModule := test.NewNetwork(
k.PublicKey(),
&test.FixedLatencyModel{},
test.NewDefaultMarshaller(nil),
test.NetworkConfig{Type: test.NetworkTypeFake})
gov := seedGov.Clone()
gov.SwitchToRemoteMode(networkModule)
gov.NotifyRoundHeight(0, 0)
networkModule.AddNodeSetCache(utils.NewNodeSetCache(gov))
app := test.NewApp(gov.State())
// Now is the consensus module.
con := core.NewConsensus(
dMoment,
app,
gov,
db,
networkModule,
k,
&common.NullLogger{})
nodes[con.ID] = &node{con, app, gov, db}
go func() {
defer wg.Done()
s.Require().NoError(networkModule.Setup(serverChannel))
go networkModule.Run()
}()
}
// Make sure transport layer is ready.
s.Require().NoError(server.WaitForPeers(uint32(len(prvKeys))))
wg.Wait()
return nodes
}
func (s *ConsensusTestSuite) verifyNodes(nodes map[types.NodeID]*node) {
for ID, node := range nodes {
s.Require().NoError(node.app.Verify())
for otherID, otherNode := range nodes {
if ID == otherID {
continue
}
s.Require().NoError(node.app.Compare(otherNode.app))
}
}
}
func (s *ConsensusTestSuite) TestSimple() {
// The simplest test case:
// - Node set is equals to DKG set and notary set for each chain in each
// round.
// - No configuration change.
// - 4 rounds (0, 1 are genesis rounds, round 2 would be ready when the
// first block delivered. Test until round 3 should be enough.
var (
req = s.Require()
peerCount = 4
dMoment = time.Now().UTC()
untilRound = uint64(5)
)
if testing.Short() {
untilRound = 2
}
prvKeys, pubKeys, err := test.NewKeys(peerCount)
req.NoError(err)
// Setup seed governance instance. Give a short latency to make this test
// run faster.
seedGov, err := test.NewGovernance(
pubKeys, 100*time.Millisecond, core.ConfigRoundShift)
req.NoError(err)
req.NoError(seedGov.State().RequestChange(
test.StateChangeRoundInterval, 50*time.Second))
// A short round interval.
nodes := s.setupNodes(dMoment, prvKeys, seedGov)
for _, n := range nodes {
go n.con.Run(&types.Block{})
}
Loop:
for {
<-time.After(5 * time.Second)
s.T().Log("check latest position delivered by each node")
for _, n := range nodes {
latestPos := n.app.GetLatestDeliveredPosition()
s.T().Log("latestPos", n.con.ID, &latestPos)
if latestPos.Round < untilRound {
continue Loop
}
}
// Oh ya.
break
}
s.verifyNodes(nodes)
}
func (s *ConsensusTestSuite) TestNumChainsChange() {
var (
req = s.Require()
peerCount = 4
dMoment = time.Now().UTC()
untilRound = uint64(6)
)
if testing.Short() {
// Short test won't test configuration change packed as payload of
// blocks and applied when delivered.
untilRound = 5
}
prvKeys, pubKeys, err := test.NewKeys(peerCount)
req.NoError(err)
// Setup seed governance instance.
seedGov, err := test.NewGovernance(
pubKeys, 100*time.Millisecond, core.ConfigRoundShift)
req.NoError(err)
// Setup configuration for round 0 and round 1.
req.NoError(seedGov.State().RequestChange(
test.StateChangeRoundInterval, 45*time.Second))
seedGov.CatchUpWithRound(1)
// Setup configuration for round 2.
req.NoError(seedGov.State().RequestChange(
test.StateChangeNumChains, uint32(5)))
req.NoError(seedGov.State().RequestChange(
test.StateChangeRoundInterval, 55*time.Second))
seedGov.CatchUpWithRound(2)
// Setup configuration for round 3.
req.NoError(seedGov.State().RequestChange(
test.StateChangeNumChains, uint32(6)))
req.NoError(seedGov.State().RequestChange(
test.StateChangeRoundInterval, 75*time.Second))
seedGov.CatchUpWithRound(3)
// Setup nodes.
nodes := s.setupNodes(dMoment, prvKeys, seedGov)
// Pick master node, and register changes on it.
var pickedNode *node
for _, pickedNode = range nodes {
break
}
// Register configuration changes for round 4.
req.NoError(pickedNode.gov.RegisterConfigChange(
4, test.StateChangeNumChains, uint32(4)))
req.NoError(pickedNode.gov.RegisterConfigChange(
4, test.StateChangeRoundInterval, 45*time.Second))
// Register configuration changes for round 5.
req.NoError(pickedNode.gov.RegisterConfigChange(
5, test.StateChangeNumChains, uint32(5)))
req.NoError(pickedNode.gov.RegisterConfigChange(
5, test.StateChangeRoundInterval, 55*time.Second))
// Run test.
for _, n := range nodes {
go n.con.Run(&types.Block{})
}
Loop:
for {
<-time.After(5 * time.Second)
s.T().Log("check latest position delivered by each node")
for _, n := range nodes {
latestPos := n.app.GetLatestDeliveredPosition()
s.T().Log("latestPos", n.con.ID, &latestPos)
if latestPos.Round < untilRound {
continue Loop
}
}
// Oh ya.
break
}
s.verifyNodes(nodes)
}
func TestConsensus(t *testing.T) {
suite.Run(t, new(ConsensusTestSuite))
}
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