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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")
- }
- }
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