146 lines
4.1 KiB
Go
146 lines
4.1 KiB
Go
// Copyright 2017 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package les
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import (
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"fmt"
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"math/rand"
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"strconv"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/common/mclock"
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"github.com/ethereum/go-ethereum/core/rawdb"
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)
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func TestFreeClientPoolL10C100(t *testing.T) {
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testFreeClientPool(t, 10, 100)
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}
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func TestFreeClientPoolL40C200(t *testing.T) {
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testFreeClientPool(t, 40, 200)
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}
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func TestFreeClientPoolL100C300(t *testing.T) {
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testFreeClientPool(t, 100, 300)
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}
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const testFreeClientPoolTicks = 500000
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func testFreeClientPool(t *testing.T, connLimit, clientCount int) {
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var (
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clock mclock.Simulated
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db = rawdb.NewMemoryDatabase()
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connected = make([]bool, clientCount)
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connTicks = make([]int, clientCount)
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disconnCh = make(chan int, clientCount)
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peerAddress = func(i int) string {
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return fmt.Sprintf("addr #%d", i)
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}
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peerId = func(i int) string {
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return fmt.Sprintf("id #%d", i)
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}
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disconnFn = func(id string) {
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i, err := strconv.Atoi(id[4:])
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if err != nil {
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panic(err)
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}
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disconnCh <- i
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}
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pool = newFreeClientPool(db, 1, 10000, &clock, disconnFn, nil, nil)
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)
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pool.setLimits(connLimit, uint64(connLimit))
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// pool should accept new peers up to its connected limit
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for i := 0; i < connLimit; i++ {
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if pool.connect(peerAddress(i), peerId(i)) {
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connected[i] = true
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} else {
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t.Fatalf("Test peer #%d rejected", i)
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}
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}
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// since all accepted peers are new and should not be kicked out, the next one should be rejected
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if pool.connect(peerAddress(connLimit), peerId(connLimit)) {
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connected[connLimit] = true
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t.Fatalf("Peer accepted over connected limit")
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}
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// randomly connect and disconnect peers, expect to have a similar total connection time at the end
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for tickCounter := 0; tickCounter < testFreeClientPoolTicks; tickCounter++ {
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clock.Run(1 * time.Second)
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i := rand.Intn(clientCount)
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if connected[i] {
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pool.disconnect(peerAddress(i))
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connected[i] = false
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connTicks[i] += tickCounter
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} else {
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if pool.connect(peerAddress(i), peerId(i)) {
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connected[i] = true
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connTicks[i] -= tickCounter
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}
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}
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pollDisconnects:
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for {
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select {
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case i := <-disconnCh:
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pool.disconnect(peerAddress(i))
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if connected[i] {
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connTicks[i] += tickCounter
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connected[i] = false
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}
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default:
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break pollDisconnects
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}
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}
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}
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expTicks := testFreeClientPoolTicks * connLimit / clientCount
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expMin := expTicks - expTicks/10
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expMax := expTicks + expTicks/10
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// check if the total connected time of peers are all in the expected range
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for i, c := range connected {
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if c {
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connTicks[i] += testFreeClientPoolTicks
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}
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if connTicks[i] < expMin || connTicks[i] > expMax {
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t.Errorf("Total connected time of test node #%d (%d) outside expected range (%d to %d)", i, connTicks[i], expMin, expMax)
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}
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}
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// a previously unknown peer should be accepted now
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if !pool.connect("newAddr", "newId") {
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t.Fatalf("Previously unknown peer rejected")
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}
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// close and restart pool
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pool.stop()
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pool = newFreeClientPool(db, 1, 10000, &clock, disconnFn, nil, nil)
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pool.setLimits(connLimit, uint64(connLimit))
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// try connecting all known peers (connLimit should be filled up)
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for i := 0; i < clientCount; i++ {
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pool.connect(peerAddress(i), peerId(i))
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}
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// expect pool to remember known nodes and kick out one of them to accept a new one
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if !pool.connect("newAddr2", "newId2") {
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t.Errorf("Previously unknown peer rejected after restarting pool")
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}
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pool.stop()
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}
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