1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
// Copyright 2016 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 network
import (
"bytes"
"io/ioutil"
"os"
"path/filepath"
"testing"
"time"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"github.com/ethereum/go-ethereum/swarm/storage"
)
func init() {
glog.SetV(0)
glog.SetToStderr(true)
}
type testSyncDb struct {
*syncDb
c int
t *testing.T
fromDb chan bool
delivered [][]byte
sent []int
dbdir string
at int
}
func newTestSyncDb(priority, bufferSize, batchSize int, dbdir string, t *testing.T) *testSyncDb {
if len(dbdir) == 0 {
tmp, err := ioutil.TempDir(os.TempDir(), "syncdb-test")
if err != nil {
t.Fatalf("unable to create temporary direcory %v: %v", tmp, err)
}
dbdir = tmp
}
db, err := storage.NewLDBDatabase(filepath.Join(dbdir, "requestdb"))
if err != nil {
t.Fatalf("unable to create db: %v", err)
}
self := &testSyncDb{
fromDb: make(chan bool),
dbdir: dbdir,
t: t,
}
h := crypto.Keccak256Hash([]byte{0})
key := storage.Key(h[:])
self.syncDb = newSyncDb(db, key, uint(priority), uint(bufferSize), uint(batchSize), self.deliver)
// kick off db iterator right away, if no items on db this will allow
// reading from the buffer
return self
}
func (self *testSyncDb) close() {
self.db.Close()
os.RemoveAll(self.dbdir)
}
func (self *testSyncDb) push(n int) {
for i := 0; i < n; i++ {
self.buffer <- storage.Key(crypto.Keccak256([]byte{byte(self.c)}))
self.sent = append(self.sent, self.c)
self.c++
}
glog.V(logger.Debug).Infof("pushed %v requests", n)
}
func (self *testSyncDb) draindb() {
it := self.db.NewIterator()
defer it.Release()
for {
it.Seek(self.start)
if !it.Valid() {
return
}
k := it.Key()
if len(k) == 0 || k[0] == 1 {
return
}
it.Release()
it = self.db.NewIterator()
}
}
func (self *testSyncDb) deliver(req interface{}, quit chan bool) bool {
_, db := req.(*syncDbEntry)
key, _, _, _, err := parseRequest(req)
if err != nil {
self.t.Fatalf("unexpected error of key %v: %v", key, err)
}
self.delivered = append(self.delivered, key)
select {
case self.fromDb <- db:
return true
case <-quit:
return false
}
}
func (self *testSyncDb) expect(n int, db bool) {
var ok bool
// for n items
for i := 0; i < n; i++ {
ok = <-self.fromDb
if self.at+1 > len(self.delivered) {
self.t.Fatalf("expected %v, got %v", self.at+1, len(self.delivered))
}
if len(self.sent) > self.at && !bytes.Equal(crypto.Keccak256([]byte{byte(self.sent[self.at])}), self.delivered[self.at]) {
self.t.Fatalf("expected delivery %v/%v/%v to be hash of %v, from db: %v = %v", i, n, self.at, self.sent[self.at], ok, db)
glog.V(logger.Debug).Infof("%v/%v/%v to be hash of %v, from db: %v = %v", i, n, self.at, self.sent[self.at], ok, db)
}
if !ok && db {
self.t.Fatalf("expected delivery %v/%v/%v from db", i, n, self.at)
}
if ok && !db {
self.t.Fatalf("expected delivery %v/%v/%v from cache", i, n, self.at)
}
self.at++
}
}
func TestSyncDb(t *testing.T) {
t.Skip("fails randomly on all platforms")
priority := High
bufferSize := 5
batchSize := 2 * bufferSize
s := newTestSyncDb(priority, bufferSize, batchSize, "", t)
defer s.close()
defer s.stop()
s.dbRead(false, 0, s.deliver)
s.draindb()
s.push(4)
s.expect(1, false)
// 3 in buffer
time.Sleep(100 * time.Millisecond)
s.push(3)
// push over limit
s.expect(1, false)
// one popped from the buffer, then contention detected
s.expect(4, true)
s.push(4)
s.expect(5, true)
// depleted db, switch back to buffer
s.draindb()
s.push(5)
s.expect(4, false)
s.push(3)
s.expect(4, false)
// buffer depleted
time.Sleep(100 * time.Millisecond)
s.push(6)
s.expect(1, false)
// push into buffer full, switch to db
s.expect(5, true)
s.draindb()
s.push(1)
s.expect(1, false)
}
func TestSaveSyncDb(t *testing.T) {
amount := 30
priority := High
bufferSize := amount
batchSize := 10
s := newTestSyncDb(priority, bufferSize, batchSize, "", t)
go s.dbRead(false, 0, s.deliver)
s.push(amount)
s.stop()
s.db.Close()
s = newTestSyncDb(priority, bufferSize, batchSize, s.dbdir, t)
go s.dbRead(false, 0, s.deliver)
s.expect(amount, true)
for i, key := range s.delivered {
expKey := crypto.Keccak256([]byte{byte(i)})
if !bytes.Equal(key, expKey) {
t.Fatalf("delivery %v expected to be key %x, got %x", i, expKey, key)
}
}
s.push(amount)
s.expect(amount, false)
for i := amount; i < 2*amount; i++ {
key := s.delivered[i]
expKey := crypto.Keccak256([]byte{byte(i - amount)})
if !bytes.Equal(key, expKey) {
t.Fatalf("delivery %v expected to be key %x, got %x", i, expKey, key)
}
}
s.stop()
s.db.Close()
s = newTestSyncDb(priority, bufferSize, batchSize, s.dbdir, t)
defer s.close()
defer s.stop()
go s.dbRead(false, 0, s.deliver)
s.push(1)
s.expect(1, false)
}
|
