plugeth/les/clientpool_test.go

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// Copyright 2019 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package les
import (
"fmt"
"math/rand"
"testing"
"time"
"github.com/ethereum/go-ethereum/common/mclock"
"github.com/ethereum/go-ethereum/core/rawdb"
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vfs "github.com/ethereum/go-ethereum/les/vflux/server"
"github.com/ethereum/go-ethereum/p2p/enode"
"github.com/ethereum/go-ethereum/p2p/enr"
"github.com/ethereum/go-ethereum/p2p/nodestate"
)
func TestClientPoolL10C100Free(t *testing.T) {
testClientPool(t, 10, 100, 0, true)
}
func TestClientPoolL40C200Free(t *testing.T) {
testClientPool(t, 40, 200, 0, true)
}
func TestClientPoolL100C300Free(t *testing.T) {
testClientPool(t, 100, 300, 0, true)
}
func TestClientPoolL10C100P4(t *testing.T) {
testClientPool(t, 10, 100, 4, false)
}
func TestClientPoolL40C200P30(t *testing.T) {
testClientPool(t, 40, 200, 30, false)
}
func TestClientPoolL100C300P20(t *testing.T) {
testClientPool(t, 100, 300, 20, false)
}
const testClientPoolTicks = 100000
type poolTestPeer struct {
node *enode.Node
index int
disconnCh chan int
cap uint64
inactiveAllowed bool
}
func testStateMachine() *nodestate.NodeStateMachine {
return nodestate.NewNodeStateMachine(nil, nil, mclock.System{}, serverSetup)
}
func newPoolTestPeer(i int, disconnCh chan int) *poolTestPeer {
return &poolTestPeer{
index: i,
disconnCh: disconnCh,
node: enode.SignNull(&enr.Record{}, enode.ID{byte(i % 256), byte(i >> 8)}),
}
}
func (i *poolTestPeer) Node() *enode.Node {
return i.node
}
func (i *poolTestPeer) freeClientId() string {
return fmt.Sprintf("addr #%d", i.index)
}
func (i *poolTestPeer) updateCapacity(cap uint64) {
i.cap = cap
}
func (i *poolTestPeer) freeze() {}
func (i *poolTestPeer) allowInactive() bool {
return i.inactiveAllowed
}
func getBalance(pool *clientPool, p *poolTestPeer) (pos, neg uint64) {
temp := pool.ns.GetField(p.node, clientInfoField) == nil
if temp {
pool.ns.SetField(p.node, connAddressField, p.freeClientId())
}
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n, _ := pool.ns.GetField(p.node, pool.BalanceField).(*vfs.NodeBalance)
pos, neg = n.GetBalance()
if temp {
pool.ns.SetField(p.node, connAddressField, nil)
}
return
}
func addBalance(pool *clientPool, id enode.ID, amount int64) {
pool.forClients([]enode.ID{id}, func(c *clientInfo) {
c.balance.AddBalance(amount)
})
}
func checkDiff(a, b uint64) bool {
maxDiff := (a + b) / 2000
if maxDiff < 1 {
maxDiff = 1
}
return a > b+maxDiff || b > a+maxDiff
}
func testClientPool(t *testing.T, activeLimit, clientCount, paidCount int, randomDisconnect bool) {
rand.Seed(time.Now().UnixNano())
var (
clock mclock.Simulated
db = rawdb.NewMemoryDatabase()
connected = make([]bool, clientCount)
connTicks = make([]int, clientCount)
disconnCh = make(chan int, clientCount)
disconnFn = func(id enode.ID) {
disconnCh <- int(id[0]) + int(id[1])<<8
}
pool = newClientPool(testStateMachine(), db, 1, 0, &clock, disconnFn)
)
pool.ns.Start()
pool.setLimits(activeLimit, uint64(activeLimit))
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pool.setDefaultFactors(vfs.PriceFactors{TimeFactor: 1, CapacityFactor: 0, RequestFactor: 1}, vfs.PriceFactors{TimeFactor: 1, CapacityFactor: 0, RequestFactor: 1})
// pool should accept new peers up to its connected limit
for i := 0; i < activeLimit; i++ {
if cap, _ := pool.connect(newPoolTestPeer(i, disconnCh)); cap != 0 {
connected[i] = true
} else {
t.Fatalf("Test peer #%d rejected", i)
}
}
// randomly connect and disconnect peers, expect to have a similar total connection time at the end
for tickCounter := 0; tickCounter < testClientPoolTicks; tickCounter++ {
clock.Run(1 * time.Second)
if tickCounter == testClientPoolTicks/4 {
// give a positive balance to some of the peers
amount := testClientPoolTicks / 2 * int64(time.Second) // enough for half of the simulation period
for i := 0; i < paidCount; i++ {
addBalance(pool, newPoolTestPeer(i, disconnCh).node.ID(), amount)
}
}
i := rand.Intn(clientCount)
if connected[i] {
if randomDisconnect {
pool.disconnect(newPoolTestPeer(i, disconnCh))
connected[i] = false
connTicks[i] += tickCounter
}
} else {
if cap, _ := pool.connect(newPoolTestPeer(i, disconnCh)); cap != 0 {
connected[i] = true
connTicks[i] -= tickCounter
} else {
pool.disconnect(newPoolTestPeer(i, disconnCh))
}
}
pollDisconnects:
for {
select {
case i := <-disconnCh:
pool.disconnect(newPoolTestPeer(i, disconnCh))
if connected[i] {
connTicks[i] += tickCounter
connected[i] = false
}
default:
break pollDisconnects
}
}
}
expTicks := testClientPoolTicks/2*activeLimit/clientCount + testClientPoolTicks/2*(activeLimit-paidCount)/(clientCount-paidCount)
expMin := expTicks - expTicks/5
expMax := expTicks + expTicks/5
paidTicks := testClientPoolTicks/2*activeLimit/clientCount + testClientPoolTicks/2
paidMin := paidTicks - paidTicks/5
paidMax := paidTicks + paidTicks/5
// check if the total connected time of peers are all in the expected range
for i, c := range connected {
if c {
connTicks[i] += testClientPoolTicks
}
min, max := expMin, expMax
if i < paidCount {
// expect a higher amount for clients with a positive balance
min, max = paidMin, paidMax
}
if connTicks[i] < min || connTicks[i] > max {
t.Errorf("Total connected time of test node #%d (%d) outside expected range (%d to %d)", i, connTicks[i], min, max)
}
}
pool.stop()
}
func testPriorityConnect(t *testing.T, pool *clientPool, p *poolTestPeer, cap uint64, expSuccess bool) {
if cap, _ := pool.connect(p); cap == 0 {
if expSuccess {
t.Fatalf("Failed to connect paid client")
} else {
return
}
}
if _, err := pool.setCapacity(p.node, "", cap, defaultConnectedBias, true); err != nil {
if expSuccess {
t.Fatalf("Failed to raise capacity of paid client")
} else {
return
}
}
if !expSuccess {
t.Fatalf("Should reject high capacity paid client")
}
}
func TestConnectPaidClient(t *testing.T) {
var (
clock mclock.Simulated
db = rawdb.NewMemoryDatabase()
)
pool := newClientPool(testStateMachine(), db, 1, defaultConnectedBias, &clock, func(id enode.ID) {})
pool.ns.Start()
defer pool.stop()
pool.setLimits(10, uint64(10))
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pool.setDefaultFactors(vfs.PriceFactors{TimeFactor: 1, CapacityFactor: 0, RequestFactor: 1}, vfs.PriceFactors{TimeFactor: 1, CapacityFactor: 0, RequestFactor: 1})
// Add balance for an external client and mark it as paid client
addBalance(pool, newPoolTestPeer(0, nil).node.ID(), int64(time.Minute))
testPriorityConnect(t, pool, newPoolTestPeer(0, nil), 10, true)
}
func TestConnectPaidClientToSmallPool(t *testing.T) {
var (
clock mclock.Simulated
db = rawdb.NewMemoryDatabase()
)
pool := newClientPool(testStateMachine(), db, 1, defaultConnectedBias, &clock, func(id enode.ID) {})
pool.ns.Start()
defer pool.stop()
pool.setLimits(10, uint64(10)) // Total capacity limit is 10
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pool.setDefaultFactors(vfs.PriceFactors{TimeFactor: 1, CapacityFactor: 0, RequestFactor: 1}, vfs.PriceFactors{TimeFactor: 1, CapacityFactor: 0, RequestFactor: 1})
// Add balance for an external client and mark it as paid client
addBalance(pool, newPoolTestPeer(0, nil).node.ID(), int64(time.Minute))
// Connect a fat paid client to pool, should reject it.
testPriorityConnect(t, pool, newPoolTestPeer(0, nil), 100, false)
}
func TestConnectPaidClientToFullPool(t *testing.T) {
var (
clock mclock.Simulated
db = rawdb.NewMemoryDatabase()
)
removeFn := func(enode.ID) {} // Noop
pool := newClientPool(testStateMachine(), db, 1, defaultConnectedBias, &clock, removeFn)
pool.ns.Start()
defer pool.stop()
pool.setLimits(10, uint64(10)) // Total capacity limit is 10
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pool.setDefaultFactors(vfs.PriceFactors{TimeFactor: 1, CapacityFactor: 0, RequestFactor: 1}, vfs.PriceFactors{TimeFactor: 1, CapacityFactor: 0, RequestFactor: 1})
for i := 0; i < 10; i++ {
addBalance(pool, newPoolTestPeer(i, nil).node.ID(), int64(time.Second*20))
pool.connect(newPoolTestPeer(i, nil))
}
addBalance(pool, newPoolTestPeer(11, nil).node.ID(), int64(time.Second*2)) // Add low balance to new paid client
if cap, _ := pool.connect(newPoolTestPeer(11, nil)); cap != 0 {
t.Fatalf("Low balance paid client should be rejected")
}
clock.Run(time.Second)
addBalance(pool, newPoolTestPeer(12, nil).node.ID(), int64(time.Minute*5)) // Add high balance to new paid client
if cap, _ := pool.connect(newPoolTestPeer(12, nil)); cap == 0 {
t.Fatalf("High balance paid client should be accepted")
}
}
func TestPaidClientKickedOut(t *testing.T) {
var (
clock mclock.Simulated
db = rawdb.NewMemoryDatabase()
kickedCh = make(chan int, 100)
)
removeFn := func(id enode.ID) {
kickedCh <- int(id[0])
}
pool := newClientPool(testStateMachine(), db, 1, defaultConnectedBias, &clock, removeFn)
pool.ns.Start()
pool.bt.SetExpirationTCs(0, 0)
defer pool.stop()
pool.setLimits(10, uint64(10)) // Total capacity limit is 10
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pool.setDefaultFactors(vfs.PriceFactors{TimeFactor: 1, CapacityFactor: 0, RequestFactor: 1}, vfs.PriceFactors{TimeFactor: 1, CapacityFactor: 0, RequestFactor: 1})
for i := 0; i < 10; i++ {
addBalance(pool, newPoolTestPeer(i, kickedCh).node.ID(), 10000000000) // 10 second allowance
pool.connect(newPoolTestPeer(i, kickedCh))
clock.Run(time.Millisecond)
}
clock.Run(defaultConnectedBias + time.Second*11)
if cap, _ := pool.connect(newPoolTestPeer(11, kickedCh)); cap == 0 {
t.Fatalf("Free client should be accepted")
}
select {
case id := <-kickedCh:
if id != 0 {
t.Fatalf("Kicked client mismatch, want %v, got %v", 0, id)
}
case <-time.NewTimer(time.Second).C:
t.Fatalf("timeout")
}
}
func TestConnectFreeClient(t *testing.T) {
var (
clock mclock.Simulated
db = rawdb.NewMemoryDatabase()
)
pool := newClientPool(testStateMachine(), db, 1, defaultConnectedBias, &clock, func(id enode.ID) {})
pool.ns.Start()
defer pool.stop()
pool.setLimits(10, uint64(10))
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pool.setDefaultFactors(vfs.PriceFactors{TimeFactor: 1, CapacityFactor: 0, RequestFactor: 1}, vfs.PriceFactors{TimeFactor: 1, CapacityFactor: 0, RequestFactor: 1})
if cap, _ := pool.connect(newPoolTestPeer(0, nil)); cap == 0 {
t.Fatalf("Failed to connect free client")
}
testPriorityConnect(t, pool, newPoolTestPeer(0, nil), 2, false)
}
func TestConnectFreeClientToFullPool(t *testing.T) {
var (
clock mclock.Simulated
db = rawdb.NewMemoryDatabase()
)
removeFn := func(enode.ID) {} // Noop
pool := newClientPool(testStateMachine(), db, 1, defaultConnectedBias, &clock, removeFn)
pool.ns.Start()
defer pool.stop()
pool.setLimits(10, uint64(10)) // Total capacity limit is 10
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pool.setDefaultFactors(vfs.PriceFactors{TimeFactor: 1, CapacityFactor: 0, RequestFactor: 1}, vfs.PriceFactors{TimeFactor: 1, CapacityFactor: 0, RequestFactor: 1})
for i := 0; i < 10; i++ {
pool.connect(newPoolTestPeer(i, nil))
}
if cap, _ := pool.connect(newPoolTestPeer(11, nil)); cap != 0 {
t.Fatalf("New free client should be rejected")
}
clock.Run(time.Minute)
if cap, _ := pool.connect(newPoolTestPeer(12, nil)); cap != 0 {
t.Fatalf("New free client should be rejected")
}
clock.Run(time.Millisecond)
clock.Run(4 * time.Minute)
if cap, _ := pool.connect(newPoolTestPeer(13, nil)); cap == 0 {
t.Fatalf("Old client connects more than 5min should be kicked")
}
}
func TestFreeClientKickedOut(t *testing.T) {
var (
clock mclock.Simulated
db = rawdb.NewMemoryDatabase()
kicked = make(chan int, 100)
)
removeFn := func(id enode.ID) { kicked <- int(id[0]) }
pool := newClientPool(testStateMachine(), db, 1, defaultConnectedBias, &clock, removeFn)
pool.ns.Start()
defer pool.stop()
pool.setLimits(10, uint64(10)) // Total capacity limit is 10
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pool.setDefaultFactors(vfs.PriceFactors{TimeFactor: 1, CapacityFactor: 0, RequestFactor: 1}, vfs.PriceFactors{TimeFactor: 1, CapacityFactor: 0, RequestFactor: 1})
for i := 0; i < 10; i++ {
pool.connect(newPoolTestPeer(i, kicked))
clock.Run(time.Millisecond)
}
if cap, _ := pool.connect(newPoolTestPeer(10, kicked)); cap != 0 {
t.Fatalf("New free client should be rejected")
}
select {
case <-kicked:
case <-time.NewTimer(time.Second).C:
t.Fatalf("timeout")
}
pool.disconnect(newPoolTestPeer(10, kicked))
clock.Run(5 * time.Minute)
for i := 0; i < 10; i++ {
pool.connect(newPoolTestPeer(i+10, kicked))
}
for i := 0; i < 10; i++ {
select {
case id := <-kicked:
if id >= 10 {
t.Fatalf("Old client should be kicked, now got: %d", id)
}
case <-time.NewTimer(time.Second).C:
t.Fatalf("timeout")
}
}
}
func TestPositiveBalanceCalculation(t *testing.T) {
var (
clock mclock.Simulated
db = rawdb.NewMemoryDatabase()
kicked = make(chan int, 10)
)
removeFn := func(id enode.ID) { kicked <- int(id[0]) } // Noop
pool := newClientPool(testStateMachine(), db, 1, defaultConnectedBias, &clock, removeFn)
pool.ns.Start()
defer pool.stop()
pool.setLimits(10, uint64(10)) // Total capacity limit is 10
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pool.setDefaultFactors(vfs.PriceFactors{TimeFactor: 1, CapacityFactor: 0, RequestFactor: 1}, vfs.PriceFactors{TimeFactor: 1, CapacityFactor: 0, RequestFactor: 1})
addBalance(pool, newPoolTestPeer(0, kicked).node.ID(), int64(time.Minute*3))
testPriorityConnect(t, pool, newPoolTestPeer(0, kicked), 10, true)
clock.Run(time.Minute)
pool.disconnect(newPoolTestPeer(0, kicked))
pb, _ := getBalance(pool, newPoolTestPeer(0, kicked))
if checkDiff(pb, uint64(time.Minute*2)) {
t.Fatalf("Positive balance mismatch, want %v, got %v", uint64(time.Minute*2), pb)
}
}
func TestDowngradePriorityClient(t *testing.T) {
var (
clock mclock.Simulated
db = rawdb.NewMemoryDatabase()
kicked = make(chan int, 10)
)
removeFn := func(id enode.ID) { kicked <- int(id[0]) } // Noop
pool := newClientPool(testStateMachine(), db, 1, defaultConnectedBias, &clock, removeFn)
pool.ns.Start()
defer pool.stop()
pool.setLimits(10, uint64(10)) // Total capacity limit is 10
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pool.setDefaultFactors(vfs.PriceFactors{TimeFactor: 1, CapacityFactor: 0, RequestFactor: 1}, vfs.PriceFactors{TimeFactor: 1, CapacityFactor: 0, RequestFactor: 1})
p := newPoolTestPeer(0, kicked)
addBalance(pool, p.node.ID(), int64(time.Minute))
testPriorityConnect(t, pool, p, 10, true)
if p.cap != 10 {
t.Fatalf("The capacity of priority peer hasn't been updated, got: %d", p.cap)
}
clock.Run(time.Minute) // All positive balance should be used up.
time.Sleep(300 * time.Millisecond) // Ensure the callback is called
if p.cap != 1 {
t.Fatalf("The capcacity of peer should be downgraded, got: %d", p.cap)
}
pb, _ := getBalance(pool, newPoolTestPeer(0, kicked))
if pb != 0 {
t.Fatalf("Positive balance mismatch, want %v, got %v", 0, pb)
}
addBalance(pool, newPoolTestPeer(0, kicked).node.ID(), int64(time.Minute))
pb, _ = getBalance(pool, newPoolTestPeer(0, kicked))
if checkDiff(pb, uint64(time.Minute)) {
t.Fatalf("Positive balance mismatch, want %v, got %v", uint64(time.Minute), pb)
}
}
func TestNegativeBalanceCalculation(t *testing.T) {
var (
clock mclock.Simulated
db = rawdb.NewMemoryDatabase()
)
pool := newClientPool(testStateMachine(), db, 1, defaultConnectedBias, &clock, func(id enode.ID) {})
pool.ns.Start()
defer pool.stop()
pool.setLimits(10, uint64(10)) // Total capacity limit is 10
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pool.setDefaultFactors(vfs.PriceFactors{TimeFactor: 1e-3, CapacityFactor: 0, RequestFactor: 1}, vfs.PriceFactors{TimeFactor: 1e-3, CapacityFactor: 0, RequestFactor: 1})
for i := 0; i < 10; i++ {
pool.connect(newPoolTestPeer(i, nil))
}
clock.Run(time.Second)
for i := 0; i < 10; i++ {
pool.disconnect(newPoolTestPeer(i, nil))
_, nb := getBalance(pool, newPoolTestPeer(i, nil))
if nb != 0 {
t.Fatalf("Short connection shouldn't be recorded")
}
}
for i := 0; i < 10; i++ {
pool.connect(newPoolTestPeer(i, nil))
}
clock.Run(time.Minute)
for i := 0; i < 10; i++ {
pool.disconnect(newPoolTestPeer(i, nil))
_, nb := getBalance(pool, newPoolTestPeer(i, nil))
exp := uint64(time.Minute) / 1000
exp -= exp / 120 // correct for negative balance expiration
if checkDiff(nb, exp) {
t.Fatalf("Negative balance mismatch, want %v, got %v", exp, nb)
}
}
}
func TestInactiveClient(t *testing.T) {
var (
clock mclock.Simulated
db = rawdb.NewMemoryDatabase()
)
pool := newClientPool(testStateMachine(), db, 1, defaultConnectedBias, &clock, func(id enode.ID) {})
pool.ns.Start()
defer pool.stop()
pool.setLimits(2, uint64(2))
p1 := newPoolTestPeer(1, nil)
p1.inactiveAllowed = true
p2 := newPoolTestPeer(2, nil)
p2.inactiveAllowed = true
p3 := newPoolTestPeer(3, nil)
p3.inactiveAllowed = true
addBalance(pool, p1.node.ID(), 1000*int64(time.Second))
addBalance(pool, p3.node.ID(), 2000*int64(time.Second))
// p1: 1000 p2: 0 p3: 2000
p1.cap, _ = pool.connect(p1)
if p1.cap != 1 {
t.Fatalf("Failed to connect peer #1")
}
p2.cap, _ = pool.connect(p2)
if p2.cap != 1 {
t.Fatalf("Failed to connect peer #2")
}
p3.cap, _ = pool.connect(p3)
if p3.cap != 1 {
t.Fatalf("Failed to connect peer #3")
}
if p2.cap != 0 {
t.Fatalf("Failed to deactivate peer #2")
}
addBalance(pool, p2.node.ID(), 3000*int64(time.Second))
// p1: 1000 p2: 3000 p3: 2000
if p2.cap != 1 {
t.Fatalf("Failed to activate peer #2")
}
if p1.cap != 0 {
t.Fatalf("Failed to deactivate peer #1")
}
addBalance(pool, p2.node.ID(), -2500*int64(time.Second))
// p1: 1000 p2: 500 p3: 2000
if p1.cap != 1 {
t.Fatalf("Failed to activate peer #1")
}
if p2.cap != 0 {
t.Fatalf("Failed to deactivate peer #2")
}
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pool.setDefaultFactors(vfs.PriceFactors{TimeFactor: 1, CapacityFactor: 0, RequestFactor: 0}, vfs.PriceFactors{TimeFactor: 1, CapacityFactor: 0, RequestFactor: 0})
p4 := newPoolTestPeer(4, nil)
addBalance(pool, p4.node.ID(), 1500*int64(time.Second))
// p1: 1000 p2: 500 p3: 2000 p4: 1500
p4.cap, _ = pool.connect(p4)
if p4.cap != 1 {
t.Fatalf("Failed to activate peer #4")
}
if p1.cap != 0 {
t.Fatalf("Failed to deactivate peer #1")
}
clock.Run(time.Second * 600)
// manually trigger a check to avoid a long real-time wait
pool.ns.SetState(p1.node, pool.UpdateFlag, nodestate.Flags{}, 0)
pool.ns.SetState(p1.node, nodestate.Flags{}, pool.UpdateFlag, 0)
// p1: 1000 p2: 500 p3: 2000 p4: 900
if p1.cap != 1 {
t.Fatalf("Failed to activate peer #1")
}
if p4.cap != 0 {
t.Fatalf("Failed to deactivate peer #4")
}
pool.disconnect(p2)
pool.disconnect(p4)
addBalance(pool, p1.node.ID(), -1000*int64(time.Second))
if p1.cap != 1 {
t.Fatalf("Should not deactivate peer #1")
}
if p2.cap != 0 {
t.Fatalf("Should not activate peer #2")
}
}