// 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 core
import (
"testing"
"time"
"github.com/stretchr/testify/suite"
"github.com/dexon-foundation/dexon-consensus/core/test"
"github.com/dexon-foundation/dexon-consensus/core/types"
)
var (
baseTime = time.Now().UTC()
timeDelay = 2 * time.Second
timeExpire = 100 * time.Millisecond
)
type NegativeAckTest struct {
suite.Suite
}
func (s *NegativeAckTest) SetupSuite() {
}
func (s *NegativeAckTest) SetupTest() {
}
func (s *NegativeAckTest) checkLastVotes(
nids []types.NodeID,
vs map[types.NodeID]map[types.NodeID]struct{},
a [][]bool,
) {
for i := 0; i < len(nids); i++ {
for j := 0; j < len(nids); j++ {
_, exist := vs[nids[i]][nids[j]]
s.Require().Equal(a[i][j], exist)
}
}
}
func (s *NegativeAckTest) checkTimeDiff(
nids []types.NodeID,
ts map[types.NodeID]map[types.NodeID]time.Time,
a [][]int,
) {
for i := 0; i < len(nids); i++ {
for j := 0; j < len(nids); j++ {
s.Require().Equal(
time.Duration(a[i][j])*timeDelay,
ts[nids[i]][nids[j]].Sub(baseTime),
)
}
}
}
func genTimestamp(nids []types.NodeID, a []int) map[types.NodeID]time.Time {
ts := map[types.NodeID]time.Time{}
for i := 0; i < len(nids); i++ {
ts[nids[i]] = baseTime.Add(time.Duration(a[i]) * timeDelay)
}
return ts
}
func genTestNegativeAck(num int) (*negativeAck, []types.NodeID) {
nids := test.GenerateRandomNodeIDs(num)
n := newNegativeAck(nids[0])
for i := 1; i < num; i++ {
n.addNode(nids[i])
}
return n, nids
}
func (s *NegativeAckTest) TestProcessTimestamps() {
n, nids := genTestNegativeAck(4)
n.setTimeDelay(timeDelay)
n.setTimeExpire(timeExpire)
n.processTimestamps(nids[0], genTimestamp(nids, []int{1, 1, 1, 0}))
s.checkTimeDiff(nids, n.timeDiffs[nids[0]], [][]int{
{1, 1, 1, 0},
{1, 1, 1, 0},
{1, 1, 1, 0},
{1, 1, 1, 0},
})
s.checkLastVotes(nids, n.lastVotes, [][]bool{
{false, false, false, false},
{false, false, false, false},
{false, false, false, false},
{false, false, false, false},
})
n.processTimestamps(nids[0], genTimestamp(nids, []int{3, 1, 2, 1}))
s.checkTimeDiff(nids, n.timeDiffs[nids[0]], [][]int{
{3, 1, 2, 1},
{1, 1, 1, 0},
{3, 1, 2, 1},
{3, 1, 2, 1},
})
s.checkLastVotes(nids, n.lastVotes, [][]bool{
{false, false, false, false},
{true, false, false, false},
{false, false, false, false},
{false, false, false, false},
})
n.processTimestamps(nids[0], genTimestamp(nids, []int{5, 1, 2, 2}))
s.checkTimeDiff(nids, n.timeDiffs[nids[0]], [][]int{
{5, 1, 2, 2},
{1, 1, 1, 0},
{3, 1, 2, 1},
{5, 1, 2, 2},
})
s.checkLastVotes(nids, n.lastVotes, [][]bool{
{false, false, false, false},
{true, false, false, false},
{false, false, false, false},
{false, false, false, false},
})
}
func (s *NegativeAckTest) TestRestrictBySelf() {
var exist bool
n, nids := genTestNegativeAck(4)
n.setTimeDelay(timeDelay)
n.setTimeExpire(timeExpire)
n.processTimestamps(nids[0], genTimestamp(nids, []int{1, 1, 1, 0}))
_, exist = n.getRestrictedNodes()[nids[1]]
s.Require().False(exist)
n.processTimestamps(nids[0], genTimestamp(nids, []int{3, 1, 2, 1}))
_, exist = n.getRestrictedNodes()[nids[1]]
s.Require().True(exist)
}
func (s *NegativeAckTest) TestRestrictByVoting() {
var nackeds []types.NodeID
var exist bool
n, nids := genTestNegativeAck(4)
n.setTimeDelay(timeDelay)
n.setTimeExpire(timeExpire)
n.processTimestamps(nids[0], genTimestamp(nids, []int{1, 1, 1, 1}))
n.processTimestamps(nids[0], genTimestamp(nids, []int{2, 2, 2, 2}))
n.processTimestamps(nids[1], genTimestamp(nids, []int{1, 1, 1, 1}))
n.processTimestamps(nids[2], genTimestamp(nids, []int{1, 1, 1, 1}))
n.processTimestamps(nids[3], genTimestamp(nids, []int{1, 1, 1, 1}))
nackeds = n.processTimestamps(nids[1], genTimestamp(nids, []int{1, 3, 3, 3}))
_, exist = n.getRestrictedNodes()[nids[0]]
s.Require().False(exist)
s.Require().Equal(0, len(nackeds))
nackeds = n.processTimestamps(nids[2], genTimestamp(nids, []int{1, 3, 3, 3}))
_, exist = n.getRestrictedNodes()[nids[0]]
s.Require().True(exist)
s.Require().Equal(0, len(nackeds))
nackeds = n.processTimestamps(nids[3], genTimestamp(nids, []int{1, 3, 3, 3}))
_, exist = n.getRestrictedNodes()[nids[0]]
s.Require().False(exist)
s.Require().Equal(1, len(nackeds))
s.Require().Equal(nids[0], nackeds[0])
}
func (s *NegativeAckTest) TestExpire() {
var exist bool
n, nids := genTestNegativeAck(4)
n.setTimeDelay(timeDelay)
n.setTimeExpire(timeExpire)
n.processTimestamps(nids[0], genTimestamp(nids, []int{1, 1, 1, 1}))
n.processTimestamps(nids[1], genTimestamp(nids, []int{1, 1, 1, 1}))
n.processTimestamps(nids[2], genTimestamp(nids, []int{1, 1, 1, 1}))
n.processTimestamps(nids[3], genTimestamp(nids, []int{1, 1, 1, 1}))
n.processTimestamps(nids[1], genTimestamp(nids, []int{1, 3, 3, 3}))
n.processTimestamps(nids[2], genTimestamp(nids, []int{1, 3, 3, 3}))
_, exist = n.getRestrictedNodes()[nids[0]]
s.Require().True(exist)
time.Sleep(2 * timeExpire)
n.processTimestamps(nids[0], genTimestamp(nids, []int{2, 2, 2, 2}))
_, exist = n.getRestrictedNodes()[nids[0]]
s.Require().False(exist)
}
func (s *NegativeAckTest) TestAddDeleteNode() {
n, nids := genTestNegativeAck(10)
s.Require().Equal(10, len(n.timeDiffs))
s.Require().Equal(10, len(n.timeDiffs[nids[0]]))
for _, nid := range nids {
n.deleteNode(nid)
}
s.Require().Equal(0, len(n.timeDiffs))
}
func TestNegativeAck(t *testing.T) {
suite.Run(t, new(NegativeAckTest))
}
