go-ethereum/trie/trie_test.go

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// Copyright 2014 The go-ethereum Authors
// This file is part of the go-ethereum library.
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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
// 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,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// 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/>.
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package trie
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import (
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"bytes"
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"encoding/binary"
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"fmt"
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"io/ioutil"
"os"
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"testing"
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"github.com/davecgh/go-spew/spew"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/ethdb"
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)
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func init() {
spew.Config.Indent = " "
spew.Config.DisableMethods = true
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}
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// Used for testing
func newEmpty() *Trie {
db, _ := ethdb.NewMemDatabase()
trie, _ := New(common.Hash{}, db)
return trie
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}
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func TestEmptyTrie(t *testing.T) {
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var trie Trie
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res := trie.Hash()
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exp := emptyRoot
if res != common.Hash(exp) {
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t.Errorf("expected %x got %x", exp, res)
}
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}
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func TestNull(t *testing.T) {
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var trie Trie
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key := make([]byte, 32)
value := common.FromHex("0x823140710bf13990e4500136726d8b55")
trie.Update(key, value)
value = trie.Get(key)
}
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func TestMissingRoot(t *testing.T) {
db, _ := ethdb.NewMemDatabase()
trie, err := New(common.HexToHash("0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33"), db)
if trie != nil {
t.Error("New returned non-nil trie for invalid root")
}
if _, ok := err.(*MissingNodeError); !ok {
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t.Errorf("New returned wrong error: %v", err)
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}
}
func TestMissingNode(t *testing.T) {
db, _ := ethdb.NewMemDatabase()
trie, _ := New(common.Hash{}, db)
updateString(trie, "120000", "qwerqwerqwerqwerqwerqwerqwerqwer")
updateString(trie, "123456", "asdfasdfasdfasdfasdfasdfasdfasdf")
root, _ := trie.Commit()
trie, _ = New(root, db)
_, err := trie.TryGet([]byte("120000"))
if err != nil {
t.Errorf("Unexpected error: %v", err)
}
trie, _ = New(root, db)
_, err = trie.TryGet([]byte("120099"))
if err != nil {
t.Errorf("Unexpected error: %v", err)
}
trie, _ = New(root, db)
_, err = trie.TryGet([]byte("123456"))
if err != nil {
t.Errorf("Unexpected error: %v", err)
}
trie, _ = New(root, db)
err = trie.TryUpdate([]byte("120099"), []byte("zxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcv"))
if err != nil {
t.Errorf("Unexpected error: %v", err)
}
trie, _ = New(root, db)
err = trie.TryDelete([]byte("123456"))
if err != nil {
t.Errorf("Unexpected error: %v", err)
}
db.Delete(common.FromHex("e1d943cc8f061a0c0b98162830b970395ac9315654824bf21b73b891365262f9"))
trie, _ = New(root, db)
_, err = trie.TryGet([]byte("120000"))
if _, ok := err.(*MissingNodeError); !ok {
t.Errorf("Wrong error: %v", err)
}
trie, _ = New(root, db)
_, err = trie.TryGet([]byte("120099"))
if _, ok := err.(*MissingNodeError); !ok {
t.Errorf("Wrong error: %v", err)
}
trie, _ = New(root, db)
_, err = trie.TryGet([]byte("123456"))
if err != nil {
t.Errorf("Unexpected error: %v", err)
}
trie, _ = New(root, db)
err = trie.TryUpdate([]byte("120099"), []byte("zxcv"))
if _, ok := err.(*MissingNodeError); !ok {
t.Errorf("Wrong error: %v", err)
}
trie, _ = New(root, db)
err = trie.TryDelete([]byte("123456"))
if _, ok := err.(*MissingNodeError); !ok {
t.Errorf("Wrong error: %v", err)
}
}
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func TestInsert(t *testing.T) {
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trie := newEmpty()
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updateString(trie, "doe", "reindeer")
updateString(trie, "dog", "puppy")
updateString(trie, "dogglesworth", "cat")
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exp := common.HexToHash("8aad789dff2f538bca5d8ea56e8abe10f4c7ba3a5dea95fea4cd6e7c3a1168d3")
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root := trie.Hash()
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if root != exp {
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t.Errorf("exp %x got %x", exp, root)
}
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trie = newEmpty()
updateString(trie, "A", "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa")
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exp = common.HexToHash("d23786fb4a010da3ce639d66d5e904a11dbc02746d1ce25029e53290cabf28ab")
root, err := trie.Commit()
if err != nil {
t.Fatalf("commit error: %v", err)
}
if root != exp {
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t.Errorf("exp %x got %x", exp, root)
}
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}
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func TestGet(t *testing.T) {
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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)
}
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unknown := getString(trie, "unknown")
if unknown != nil {
t.Errorf("expected nil got %x", unknown)
}
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if i == 1 {
return
}
trie.Commit()
}
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}
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func TestDelete(t *testing.T) {
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trie := newEmpty()
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vals := []struct{ k, v string }{
{"do", "verb"},
{"ether", "wookiedoo"},
{"horse", "stallion"},
{"shaman", "horse"},
{"doge", "coin"},
{"ether", ""},
{"dog", "puppy"},
{"shaman", ""},
}
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for _, val := range vals {
if val.v != "" {
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updateString(trie, val.k, val.v)
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} else {
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deleteString(trie, val.k)
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}
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}
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hash := trie.Hash()
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exp := common.HexToHash("5991bb8c6514148a29db676a14ac506cd2cd5775ace63c30a4fe457715e9ac84")
if hash != exp {
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t.Errorf("expected %x got %x", exp, hash)
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}
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}
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func TestEmptyValues(t *testing.T) {
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trie := newEmpty()
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vals := []struct{ k, v string }{
{"do", "verb"},
{"ether", "wookiedoo"},
{"horse", "stallion"},
{"shaman", "horse"},
{"doge", "coin"},
{"ether", ""},
{"dog", "puppy"},
{"shaman", ""},
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}
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for _, val := range vals {
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updateString(trie, val.k, val.v)
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}
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hash := trie.Hash()
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exp := common.HexToHash("5991bb8c6514148a29db676a14ac506cd2cd5775ace63c30a4fe457715e9ac84")
if hash != exp {
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t.Errorf("expected %x got %x", exp, hash)
}
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}
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func TestReplication(t *testing.T) {
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trie := newEmpty()
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vals := []struct{ k, v string }{
{"do", "verb"},
{"ether", "wookiedoo"},
{"horse", "stallion"},
{"shaman", "horse"},
{"doge", "coin"},
{"dog", "puppy"},
{"somethingveryoddindeedthis is", "myothernodedata"},
}
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for _, val := range vals {
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updateString(trie, val.k, val.v)
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}
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exp, err := trie.Commit()
if err != nil {
t.Fatalf("commit error: %v", err)
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}
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// 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()
if err != nil {
t.Fatalf("commit error: %v", err)
}
if hash != exp {
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t.Errorf("root failure. expected %x got %x", exp, hash)
}
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// perform some insertions on the new trie.
vals2 := []struct{ k, v string }{
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{"do", "verb"},
{"ether", "wookiedoo"},
{"horse", "stallion"},
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// {"shaman", "horse"},
// {"doge", "coin"},
// {"ether", ""},
// {"dog", "puppy"},
// {"somethingveryoddindeedthis is", "myothernodedata"},
// {"shaman", ""},
}
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for _, val := range vals2 {
updateString(trie2, val.k, val.v)
}
if hash := trie2.Hash(); hash != exp {
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t.Errorf("root failure. expected %x got %x", exp, hash)
}
}
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func paranoiaCheck(t1 *Trie) (bool, *Trie) {
t2 := new(Trie)
it := NewIterator(t1)
for it.Next() {
t2.Update(it.Key, it.Value)
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}
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return t2.Hash() == t1.Hash(), t2
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}
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func TestParanoia(t *testing.T) {
t.Skip()
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trie := newEmpty()
vals := []struct{ k, v string }{
{"do", "verb"},
{"ether", "wookiedoo"},
{"horse", "stallion"},
{"shaman", "horse"},
{"doge", "coin"},
{"ether", ""},
{"dog", "puppy"},
{"shaman", ""},
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{"somethingveryoddindeedthis is", "myothernodedata"},
}
for _, val := range vals {
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updateString(trie, val.k, val.v)
}
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trie.Commit()
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ok, t2 := paranoiaCheck(trie)
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if !ok {
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t.Errorf("trie paranoia check failed %x %x", trie.Hash(), t2.Hash())
}
}
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// Not an actual test
func TestOutput(t *testing.T) {
t.Skip()
base := "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
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trie := newEmpty()
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for i := 0; i < 50; i++ {
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updateString(trie, fmt.Sprintf("%s%d", base, i), "valueeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee")
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}
fmt.Println("############################## FULL ################################")
fmt.Println(trie.root)
trie.Commit()
fmt.Println("############################## SMALL ################################")
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trie2, _ := New(trie.Hash(), trie.db)
getString(trie2, base+"20")
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fmt.Println(trie2.root)
}
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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()
}
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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) }
func BenchmarkHashBE(b *testing.B) { benchHash(b, binary.BigEndian) }
func BenchmarkHashLE(b *testing.B) { benchHash(b, binary.LittleEndian) }
const benchElemCount = 20000
func benchGet(b *testing.B, commit bool) {
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trie := new(Trie)
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if commit {
dir, tmpdb := tempDB()
defer os.RemoveAll(dir)
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trie, _ = New(common.Hash{}, tmpdb)
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}
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()
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
trie.Get(k)
}
}
func benchUpdate(b *testing.B, e binary.ByteOrder) *Trie {
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trie := newEmpty()
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k := make([]byte, 32)
for i := 0; i < b.N; i++ {
e.PutUint64(k, uint64(i))
trie.Update(k, k)
}
return trie
}
func benchHash(b *testing.B, e binary.ByteOrder) {
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trie := newEmpty()
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k := make([]byte, 32)
for i := 0; i < benchElemCount; i++ {
e.PutUint64(k, uint64(i))
trie.Update(k, k)
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
trie.Hash()
}
}
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func tempDB() (string, Database) {
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dir, err := ioutil.TempDir("", "trie-bench")
if err != nil {
panic(fmt.Sprintf("can't create temporary directory: %v", err))
}
db, err := ethdb.NewLDBDatabase(dir, 256, 0)
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if err != nil {
panic(fmt.Sprintf("can't create temporary database: %v", err))
}
return dir, db
}
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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))
}