aboutsummaryrefslogtreecommitdiffstats
path: root/trie/trie_test.go
blob: 9972226288988e4ef7c9b4071de7f7b9fef8341a (plain) (blame)
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
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
// Copyright 2014 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 trie

import (
    "bytes"
    "encoding/binary"
    "errors"
    "fmt"
    "io/ioutil"
    "math/big"
    "math/rand"
    "os"
    "reflect"
    "testing"
    "testing/quick"

    "github.com/davecgh/go-spew/spew"
    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/crypto"
    "github.com/ethereum/go-ethereum/ethdb"
    "github.com/ethereum/go-ethereum/rlp"
)

func init() {
    spew.Config.Indent = "    "
    spew.Config.DisableMethods = false
}

// Used for testing
func newEmpty() *Trie {
    diskdb, _ := ethdb.NewMemDatabase()
    trie, _ := New(common.Hash{}, NewDatabase(diskdb))
    return trie
}

func TestEmptyTrie(t *testing.T) {
    var trie Trie
    res := trie.Hash()
    exp := emptyRoot
    if res != common.Hash(exp) {
        t.Errorf("expected %x got %x", exp, res)
    }
}

func TestNull(t *testing.T) {
    var trie Trie
    key := make([]byte, 32)
    value := []byte("test")
    trie.Update(key, value)
    if !bytes.Equal(trie.Get(key), value) {
        t.Fatal("wrong value")
    }
}

func TestMissingRoot(t *testing.T) {
    diskdb, _ := ethdb.NewMemDatabase()
    trie, err := New(common.HexToHash("0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33"), NewDatabase(diskdb))
    if trie != nil {
        t.Error("New returned non-nil trie for invalid root")
    }
    if _, ok := err.(*MissingNodeError); !ok {
        t.Errorf("New returned wrong error: %v", err)
    }
}

func TestMissingNodeDisk(t *testing.T)    { testMissingNode(t, false) }
func TestMissingNodeMemonly(t *testing.T) { testMissingNode(t, true) }

func testMissingNode(t *testing.T, memonly bool) {
    diskdb, _ := ethdb.NewMemDatabase()
    triedb := NewDatabase(diskdb)

    trie, _ := New(common.Hash{}, triedb)
    updateString(trie, "120000", "qwerqwerqwerqwerqwerqwerqwerqwer")
    updateString(trie, "123456", "asdfasdfasdfasdfasdfasdfasdfasdf")
    root, _ := trie.Commit(nil)
    if !memonly {
        triedb.Commit(root, true)
    }

    trie, _ = New(root, triedb)
    _, err := trie.TryGet([]byte("120000"))
    if err != nil {
        t.Errorf("Unexpected error: %v", err)
    }
    trie, _ = New(root, triedb)
    _, err = trie.TryGet([]byte("120099"))
    if err != nil {
        t.Errorf("Unexpected error: %v", err)
    }
    trie, _ = New(root, triedb)
    _, err = trie.TryGet([]byte("123456"))
    if err != nil {
        t.Errorf("Unexpected error: %v", err)
    }
    trie, _ = New(root, triedb)
    err = trie.TryUpdate([]byte("120099"), []byte("zxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcv"))
    if err != nil {
        t.Errorf("Unexpected error: %v", err)
    }
    trie, _ = New(root, triedb)
    err = trie.TryDelete([]byte("123456"))
    if err != nil {
        t.Errorf("Unexpected error: %v", err)
    }

    hash := common.HexToHash("0xe1d943cc8f061a0c0b98162830b970395ac9315654824bf21b73b891365262f9")
    if memonly {
        delete(triedb.nodes, hash)
    } else {
        diskdb.Delete(hash[:])
    }

    trie, _ = New(root, triedb)
    _, err = trie.TryGet([]byte("120000"))
    if _, ok := err.(*MissingNodeError); !ok {
        t.Errorf("Wrong error: %v", err)
    }
    trie, _ = New(root, triedb)
    _, err = trie.TryGet([]byte("120099"))
    if _, ok := err.(*MissingNodeError); !ok {
        t.Errorf("Wrong error: %v", err)
    }
    trie, _ = New(root, triedb)
    _, err = trie.TryGet([]byte("123456"))
    if err != nil {
        t.Errorf("Unexpected error: %v", err)
    }
    trie, _ = New(root, triedb)
    err = trie.TryUpdate([]byte("120099"), []byte("zxcv"))
    if _, ok := err.(*MissingNodeError); !ok {
        t.Errorf("Wrong error: %v", err)
    }
    trie, _ = New(root, triedb)
    err = trie.TryDelete([]byte("123456"))
    if _, ok := err.(*MissingNodeError); !ok {
        t.Errorf("Wrong error: %v", err)
    }
}

func TestInsert(t *testing.T) {
    trie := newEmpty()

    updateString(trie, "doe", "reindeer")
    updateString(trie, "dog", "puppy")
    updateString(trie, "dogglesworth", "cat")

    exp := common.HexToHash("8aad789dff2f538bca5d8ea56e8abe10f4c7ba3a5dea95fea4cd6e7c3a1168d3")
    root := trie.Hash()
    if root != exp {
        t.Errorf("exp %x got %x", exp, root)
    }

    trie = newEmpty()
    updateString(trie, "A", "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa")

    exp = common.HexToHash("d23786fb4a010da3ce639d66d5e904a11dbc02746d1ce25029e53290cabf28ab")
    root, err := trie.Commit(nil)
    if err != nil {
        t.Fatalf("commit error: %v", err)
    }
    if root != exp {
        t.Errorf("exp %x got %x", exp, root)
    }
}

func TestGet(t *testing.T) {
    trie := newEmpty()
    updateString(trie, "doe", "reindeer")
    updateString(trie, "dog", "puppy")
    updateString(trie, "dogglesworth", "cat")

    for i := 0; i < 2; i++ {
        res := getString(trie, "dog")
        if !bytes.Equal(res, []byte("puppy")) {
            t.Errorf("expected puppy got %x", res)
        }

        unknown := getString(trie, "unknown")
        if unknown != nil {
            t.Errorf("expected nil got %x", unknown)
        }

        if i == 1 {
            return
        }
        trie.Commit(nil)
    }
}

func TestDelete(t *testing.T) {
    trie := newEmpty()
    vals := []struct{ k, v string }{
        {"do", "verb"},
        {"ether", "wookiedoo"},
        {"horse", "stallion"},
        {"shaman", "horse"},
        {"doge", "coin"},
        {"ether", ""},
        {"dog", "puppy"},
        {"shaman", ""},
    }
    for _, val := range vals {
        if val.v != "" {
            updateString(trie, val.k, val.v)
        } else {
            deleteString(trie, val.k)
        }
    }

    hash := trie.Hash()
    exp := common.HexToHash("5991bb8c6514148a29db676a14ac506cd2cd5775ace63c30a4fe457715e9ac84")
    if hash != exp {
        t.Errorf("expected %x got %x", exp, hash)
    }
}

func TestEmptyValues(t *testing.T) {
    trie := newEmpty()

    vals := []struct{ k, v string }{
        {"do", "verb"},
        {"ether", "wookiedoo"},
        {"horse", "stallion"},
        {"shaman", "horse"},
        {"doge", "coin"},
        {"ether", ""},
        {"dog", "puppy"},
        {"shaman", ""},
    }
    for _, val := range vals {
        updateString(trie, val.k, val.v)
    }

    hash := trie.Hash()
    exp := common.HexToHash("5991bb8c6514148a29db676a14ac506cd2cd5775ace63c30a4fe457715e9ac84")
    if hash != exp {
        t.Errorf("expected %x got %x", exp, hash)
    }
}

func TestReplication(t *testing.T) {
    trie := newEmpty()
    vals := []struct{ k, v string }{
        {"do", "verb"},
        {"ether", "wookiedoo"},
        {"horse", "stallion"},
        {"shaman", "horse"},
        {"doge", "coin"},
        {"dog", "puppy"},
        {"somethingveryoddindeedthis is", "myothernodedata"},
    }
    for _, val := range vals {
        updateString(trie, val.k, val.v)
    }
    exp, err := trie.Commit(nil)
    if err != nil {
        t.Fatalf("commit error: %v", err)
    }

    // create a new trie on top of the database and check that lookups work.
    trie2, err := New(exp, trie.db)
    if err != nil {
        t.Fatalf("can't recreate trie at %x: %v", exp, err)
    }
    for _, kv := range vals {
        if string(getString(trie2, kv.k)) != kv.v {
            t.Errorf("trie2 doesn't have %q => %q", kv.k, kv.v)
        }
    }
    hash, err := trie2.Commit(nil)
    if err != nil {
        t.Fatalf("commit error: %v", err)
    }
    if hash != exp {
        t.Errorf("root failure. expected %x got %x", exp, hash)
    }

    // perform some insertions on the new trie.
    vals2 := []struct{ k, v string }{
        {"do", "verb"},
        {"ether", "wookiedoo"},
        {"horse", "stallion"},
        // {"shaman", "horse"},
        // {"doge", "coin"},
        // {"ether", ""},
        // {"dog", "puppy"},
        // {"somethingveryoddindeedthis is", "myothernodedata"},
        // {"shaman", ""},
    }
    for _, val := range vals2 {
        updateString(trie2, val.k, val.v)
    }
    if hash := trie2.Hash(); hash != exp {
        t.Errorf("root failure. expected %x got %x", exp, hash)
    }
}

func TestLargeValue(t *testing.T) {
    trie := newEmpty()
    trie.Update([]byte("key1"), []byte{99, 99, 99, 99})
    trie.Update([]byte("key2"), bytes.Repeat([]byte{1}, 32))
    trie.Hash()
}

type countingDB struct {
    ethdb.Database
    gets map[string]int
}

func (db *countingDB) Get(key []byte) ([]byte, error) {
    db.gets[string(key)]++
    return db.Database.Get(key)
}

// TestCacheUnload checks that decoded nodes are unloaded after a
// certain number of commit operations.
func TestCacheUnload(t *testing.T) {
    // Create test trie with two branches.
    trie := newEmpty()
    key1 := "---------------------------------"
    key2 := "---some other branch"
    updateString(trie, key1, "this is the branch of key1.")
    updateString(trie, key2, "this is the branch of key2.")

    root, _ := trie.Commit(nil)
    trie.db.Commit(root, true)

    // Commit the trie repeatedly and access key1.
    // The branch containing it is loaded from DB exactly two times:
    // in the 0th and 6th iteration.
    db := &countingDB{Database: trie.db.diskdb, gets: make(map[string]int)}
    trie, _ = New(root, NewDatabase(db))
    trie.SetCacheLimit(5)
    for i := 0; i < 12; i++ {
        getString(trie, key1)
        trie.Commit(nil)
    }
    // Check that it got loaded two times.
    for dbkey, count := range db.gets {
        if count != 2 {
            t.Errorf("db key %x loaded %d times, want %d times", []byte(dbkey), count, 2)
        }
    }
}

// randTest performs random trie operations.
// Instances of this test are created by Generate.
type randTest []randTestStep

type randTestStep struct {
    op    int
    key   []byte // for opUpdate, opDelete, opGet
    value []byte // for opUpdate
    err   error  // for debugging
}

const (
    opUpdate = iota
    opDelete
    opGet
    opCommit
    opHash
    opReset
    opItercheckhash
    opCheckCacheInvariant
    opMax // boundary value, not an actual op
)

func (randTest) Generate(r *rand.Rand, size int) reflect.Value {
    var allKeys [][]byte
    genKey := func() []byte {
        if len(allKeys) < 2 || r.Intn(100) < 10 {
            // new key
            key := make([]byte, r.Intn(50))
            r.Read(key)
            allKeys = append(allKeys, key)
            return key
        }
        // use existing key
        return allKeys[r.Intn(len(allKeys))]
    }

    var steps randTest
    for i := 0; i < size; i++ {
        step := randTestStep{op: r.Intn(opMax)}
        switch step.op {
        case opUpdate:
            step.key = genKey()
            step.value = make([]byte, 8)
            binary.BigEndian.PutUint64(step.value, uint64(i))
        case opGet, opDelete:
            step.key = genKey()
        }
        steps = append(steps, step)
    }
    return reflect.ValueOf(steps)
}

func runRandTest(rt randTest) bool {
    diskdb, _ := ethdb.NewMemDatabase()
    triedb := NewDatabase(diskdb)

    tr, _ := New(common.Hash{}, triedb)
    values := make(map[string]string) // tracks content of the trie

    for i, step := range rt {
        switch step.op {
        case opUpdate:
            tr.Update(step.key, step.value)
            values[string(step.key)] = string(step.value)
        case opDelete:
            tr.Delete(step.key)
            delete(values, string(step.key))
        case opGet:
            v := tr.Get(step.key)
            want := values[string(step.key)]
            if string(v) != want {
                rt[i].err = fmt.Errorf("mismatch for key 0x%x, got 0x%x want 0x%x", step.key, v, want)
            }
        case opCommit:
            _, rt[i].err = tr.Commit(nil)
        case opHash:
            tr.Hash()
        case opReset:
            hash, err := tr.Commit(nil)
            if err != nil {
                rt[i].err = err
                return false
            }
            newtr, err := New(hash, triedb)
            if err != nil {
                rt[i].err = err
                return false
            }
            tr = newtr
        case opItercheckhash:
            checktr, _ := New(common.Hash{}, triedb)
            it := NewIterator(tr.NodeIterator(nil))
            for it.Next() {
                checktr.Update(it.Key, it.Value)
            }
            if tr.Hash() != checktr.Hash() {
                rt[i].err = fmt.Errorf("hash mismatch in opItercheckhash")
            }
        case opCheckCacheInvariant:
            rt[i].err = checkCacheInvariant(tr.root, nil, tr.cachegen, false, 0)
        }
        // Abort the test on error.
        if rt[i].err != nil {
            return false
        }
    }
    return true
}

func checkCacheInvariant(n, parent node, parentCachegen uint16, parentDirty bool, depth int) error {
    var children []node
    var flag nodeFlag
    switch n := n.(type) {
    case *shortNode:
        flag = n.flags
        children = []node{n.Val}
    case *fullNode:
        flag = n.flags
        children = n.Children[:]
    default:
        return nil
    }

    errorf := func(format string, args ...interface{}) error {
        msg := fmt.Sprintf(format, args...)
        msg += fmt.Sprintf("\nat depth %d node %s", depth, spew.Sdump(n))
        msg += fmt.Sprintf("parent: %s", spew.Sdump(parent))
        return errors.New(msg)
    }
    if flag.gen > parentCachegen {
        return errorf("cache invariant violation: %d > %d\n", flag.gen, parentCachegen)
    }
    if depth > 0 && !parentDirty && flag.dirty {
        return errorf("cache invariant violation: %d > %d\n", flag.gen, parentCachegen)
    }
    for _, child := range children {
        if err := checkCacheInvariant(child, n, flag.gen, flag.dirty, depth+1); err != nil {
            return err
        }
    }
    return nil
}

func TestRandom(t *testing.T) {
    if err := quick.Check(runRandTest, nil); err != nil {
        if cerr, ok := err.(*quick.CheckError); ok {
            t.Fatalf("random test iteration %d failed: %s", cerr.Count, spew.Sdump(cerr.In))
        }
        t.Fatal(err)
    }
}

func BenchmarkGet(b *testing.B)      { benchGet(b, false) }
func BenchmarkGetDB(b *testing.B)    { benchGet(b, true) }
func BenchmarkUpdateBE(b *testing.B) { benchUpdate(b, binary.BigEndian) }
func BenchmarkUpdateLE(b *testing.B) { benchUpdate(b, binary.LittleEndian) }

const benchElemCount = 20000

func benchGet(b *testing.B, commit bool) {
    trie := new(Trie)
    if commit {
        _, tmpdb := tempDB()
        trie, _ = New(common.Hash{}, tmpdb)
    }
    k := make([]byte, 32)
    for i := 0; i < benchElemCount; i++ {
        binary.LittleEndian.PutUint64(k, uint64(i))
        trie.Update(k, k)
    }
    binary.LittleEndian.PutUint64(k, benchElemCount/2)
    if commit {
        trie.Commit(nil)
    }

    b.ResetTimer()
    for i := 0; i < b.N; i++ {
        trie.Get(k)
    }
    b.StopTimer()

    if commit {
        ldb := trie.db.diskdb.(*ethdb.LDBDatabase)
        ldb.Close()
        os.RemoveAll(ldb.Path())
    }
}

func benchUpdate(b *testing.B, e binary.ByteOrder) *Trie {
    trie := newEmpty()
    k := make([]byte, 32)
    for i := 0; i < b.N; i++ {
        e.PutUint64(k, uint64(i))
        trie.Update(k, k)
    }
    return trie
}

// Benchmarks the trie hashing. Since the trie caches the result of any operation,
// we cannot use b.N as the number of hashing rouns, since all rounds apart from
// the first one will be NOOP. As such, we'll use b.N as the number of account to
// insert into the trie before measuring the hashing.
func BenchmarkHash(b *testing.B) {
    // Make the random benchmark deterministic
    random := rand.New(rand.NewSource(0))

    // Create a realistic account trie to hash
    addresses := make([][20]byte, b.N)
    for i := 0; i < len(addresses); i++ {
        for j := 0; j < len(addresses[i]); j++ {
            addresses[i][j] = byte(random.Intn(256))
        }
    }
    accounts := make([][]byte, len(addresses))
    for i := 0; i < len(accounts); i++ {
        var (
            nonce   = uint64(random.Int63())
            balance = new(big.Int).Rand(random, new(big.Int).Exp(common.Big2, common.Big256, nil))
            root    = emptyRoot
            code    = crypto.Keccak256(nil)
        )
        accounts[i], _ = rlp.EncodeToBytes([]interface{}{nonce, balance, root, code})
    }
    // Insert the accounts into the trie and hash it
    trie := newEmpty()
    for i := 0; i < len(addresses); i++ {
        trie.Update(crypto.Keccak256(addresses[i][:]), accounts[i])
    }
    b.ResetTimer()
    b.ReportAllocs()
    trie.Hash()
}

func tempDB() (string, *Database) {
    dir, err := ioutil.TempDir("", "trie-bench")
    if err != nil {
        panic(fmt.Sprintf("can't create temporary directory: %v", err))
    }
    diskdb, err := ethdb.NewLDBDatabase(dir, 256, 0)
    if err != nil {
        panic(fmt.Sprintf("can't create temporary database: %v", err))
    }
    return dir, NewDatabase(diskdb)
}

func getString(trie *Trie, k string) []byte {
    return trie.Get([]byte(k))
}

func updateString(trie *Trie, k, v string) {
    trie.Update([]byte(k), []byte(v))
}

func deleteString(trie *Trie, k string) {
    trie.Delete([]byte(k))
}