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// 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 ethdb_test
import (
"bytes"
"fmt"
"io/ioutil"
"os"
"strconv"
"sync"
"testing"
"github.com/ethereum/go-ethereum/ethdb"
)
func newTestLDB() (*ethdb.LDBDatabase, func()) {
dirname, err := ioutil.TempDir(os.TempDir(), "ethdb_test_")
if err != nil {
panic("failed to create test file: " + err.Error())
}
db, err := ethdb.NewLDBDatabase(dirname, 0, 0)
if err != nil {
panic("failed to create test database: " + err.Error())
}
return db, func() {
db.Close()
os.RemoveAll(dirname)
}
}
var test_values = []string{"", "a", "1251", "\x00123\x00"}
func TestLDB_PutGet(t *testing.T) {
db, remove := newTestLDB()
defer remove()
testPutGet(db, t)
}
func TestMemoryDB_PutGet(t *testing.T) {
db, _ := ethdb.NewMemDatabase()
testPutGet(db, t)
}
func testPutGet(db ethdb.Database, t *testing.T) {
t.Parallel()
for _, v := range test_values {
err := db.Put([]byte(v), []byte(v))
if err != nil {
t.Fatalf("put failed: %v", err)
}
}
for _, v := range test_values {
data, err := db.Get([]byte(v))
if err != nil {
t.Fatalf("get failed: %v", err)
}
if !bytes.Equal(data, []byte(v)) {
t.Fatalf("get returned wrong result, got %q expected %q", string(data), v)
}
}
for _, v := range test_values {
err := db.Put([]byte(v), []byte("?"))
if err != nil {
t.Fatalf("put override failed: %v", err)
}
}
for _, v := range test_values {
data, err := db.Get([]byte(v))
if err != nil {
t.Fatalf("get failed: %v", err)
}
if !bytes.Equal(data, []byte("?")) {
t.Fatalf("get returned wrong result, got %q expected ?", string(data))
}
}
for _, v := range test_values {
err := db.Delete([]byte(v))
if err != nil {
t.Fatalf("delete %q failed: %v", v, err)
}
}
for _, v := range test_values {
_, err := db.Get([]byte(v))
if err == nil {
t.Fatalf("got deleted value %q", v)
}
}
}
func TestLDB_ParallelPutGet(t *testing.T) {
db, remove := newTestLDB()
defer remove()
testParallelPutGet(db, t)
}
func TestMemoryDB_ParallelPutGet(t *testing.T) {
db, _ := ethdb.NewMemDatabase()
testParallelPutGet(db, t)
}
func testParallelPutGet(db ethdb.Database, t *testing.T) {
const n = 8
var pending sync.WaitGroup
pending.Add(n)
for i := 0; i < n; i++ {
go func(key string) {
defer pending.Done()
err := db.Put([]byte(key), []byte("v"+key))
if err != nil {
panic("put failed: " + err.Error())
}
}(strconv.Itoa(i))
}
pending.Wait()
pending.Add(n)
for i := 0; i < n; i++ {
go func(key string) {
defer pending.Done()
data, err := db.Get([]byte(key))
if err != nil {
panic("get failed: " + err.Error())
}
if !bytes.Equal(data, []byte("v"+key)) {
panic(fmt.Sprintf("get failed, got %q expected %q", []byte(data), []byte("v"+key)))
}
}(strconv.Itoa(i))
}
pending.Wait()
pending.Add(n)
for i := 0; i < n; i++ {
go func(key string) {
defer pending.Done()
err := db.Delete([]byte(key))
if err != nil {
panic("delete failed: " + err.Error())
}
}(strconv.Itoa(i))
}
pending.Wait()
pending.Add(n)
for i := 0; i < n; i++ {
go func(key string) {
defer pending.Done()
_, err := db.Get([]byte(key))
if err == nil {
panic("get succeeded")
}
}(strconv.Itoa(i))
}
pending.Wait()
}
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