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// Copyright 2015 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"
"runtime"
"sync"
"testing"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethdb"
)
func newEmptySecure() *SecureTrie {
db, _ := ethdb.NewMemDatabase()
trie, _ := NewSecure(common.Hash{}, db)
return trie
}
// makeTestSecureTrie creates a large enough secure trie for testing.
func makeTestSecureTrie() (ethdb.Database, *SecureTrie, map[string][]byte) {
// Create an empty trie
db, _ := ethdb.NewMemDatabase()
trie, _ := NewSecure(common.Hash{}, db)
// Fill it with some arbitrary data
content := make(map[string][]byte)
for i := byte(0); i < 255; i++ {
// Map the same data under multiple keys
key, val := common.LeftPadBytes([]byte{1, i}, 32), []byte{i}
content[string(key)] = val
trie.Update(key, val)
key, val = common.LeftPadBytes([]byte{2, i}, 32), []byte{i}
content[string(key)] = val
trie.Update(key, val)
// Add some other data to inflate th trie
for j := byte(3); j < 13; j++ {
key, val = common.LeftPadBytes([]byte{j, i}, 32), []byte{j, i}
content[string(key)] = val
trie.Update(key, val)
}
}
trie.Commit()
// Return the generated trie
return db, trie, content
}
func TestSecureDelete(t *testing.T) {
trie := newEmptySecure()
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 != "" {
trie.Update([]byte(val.k), []byte(val.v))
} else {
trie.Delete([]byte(val.k))
}
}
hash := trie.Hash()
exp := common.HexToHash("29b235a58c3c25ab83010c327d5932bcf05324b7d6b1185e650798034783ca9d")
if hash != exp {
t.Errorf("expected %x got %x", exp, hash)
}
}
func TestSecureGetKey(t *testing.T) {
trie := newEmptySecure()
trie.Update([]byte("foo"), []byte("bar"))
key := []byte("foo")
value := []byte("bar")
seckey := crypto.Keccak256(key)
if !bytes.Equal(trie.Get(key), value) {
t.Errorf("Get did not return bar")
}
if k := trie.GetKey(seckey); !bytes.Equal(k, key) {
t.Errorf("GetKey returned %q, want %q", k, key)
}
}
func TestSecureTrieConcurrency(t *testing.T) {
// Create an initial trie and copy if for concurrent access
_, trie, _ := makeTestSecureTrie()
threads := runtime.NumCPU()
tries := make([]*SecureTrie, threads)
for i := 0; i < threads; i++ {
cpy := *trie
tries[i] = &cpy
}
// Start a batch of goroutines interactng with the trie
pend := new(sync.WaitGroup)
pend.Add(threads)
for i := 0; i < threads; i++ {
go func(index int) {
defer pend.Done()
for j := byte(0); j < 255; j++ {
// Map the same data under multiple keys
key, val := common.LeftPadBytes([]byte{byte(index), 1, j}, 32), []byte{j}
tries[index].Update(key, val)
key, val = common.LeftPadBytes([]byte{byte(index), 2, j}, 32), []byte{j}
tries[index].Update(key, val)
// Add some other data to inflate the trie
for k := byte(3); k < 13; k++ {
key, val = common.LeftPadBytes([]byte{byte(index), k, j}, 32), []byte{k, j}
tries[index].Update(key, val)
}
}
tries[index].Commit()
}(i)
}
// Wait for all threads to finish
pend.Wait()
}
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