plugeth/p2p/dnsdisc/sync_test.go

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// Copyright 2018 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 dnsdisc
import (
"math/rand"
"strconv"
"testing"
)
func TestLinkCache(t *testing.T) {
var lc linkCache
// Check adding links.
lc.addLink("1", "2")
if !lc.changed {
t.Error("changed flag not set")
}
lc.changed = false
lc.addLink("1", "2")
if lc.changed {
t.Error("changed flag set after adding link that's already present")
}
lc.addLink("2", "3")
lc.addLink("3", "1")
lc.addLink("2", "4")
lc.changed = false
if !lc.isReferenced("3") {
t.Error("3 not referenced")
}
if lc.isReferenced("6") {
t.Error("6 is referenced")
}
lc.resetLinks("1", nil)
if !lc.changed {
t.Error("changed flag not set")
}
if len(lc.backrefs) != 0 {
t.Logf("%+v", lc)
t.Error("reference maps should be empty")
}
}
func TestLinkCacheRandom(t *testing.T) {
tags := make([]string, 1000)
for i := range tags {
tags[i] = strconv.Itoa(i)
}
// Create random links.
var lc linkCache
var remove []string
for i := 0; i < 100; i++ {
a, b := tags[rand.Intn(len(tags))], tags[rand.Intn(len(tags))]
lc.addLink(a, b)
remove = append(remove, a)
}
// Remove all the links.
for _, s := range remove {
lc.resetLinks(s, nil)
}
if len(lc.backrefs) != 0 {
t.Logf("%+v", lc)
t.Error("reference maps should be empty")
}
}