Official Go implementation of the Ethereum protocol
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go-ethereum/cmd/utils/export_test.go

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// Copyright 2021 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
package utils
import (
"fmt"
"os"
"strings"
"testing"
"time"
"github.com/ethereum/go-ethereum/core/rawdb"
"github.com/ethereum/go-ethereum/rlp"
)
// TestExport does basic sanity checks on the export/import functionality
func TestExport(t *testing.T) {
f := fmt.Sprintf("%v/tempdump", os.TempDir())
defer func() {
os.Remove(f)
}()
testExport(t, f)
}
func TestExportGzip(t *testing.T) {
f := fmt.Sprintf("%v/tempdump.gz", os.TempDir())
defer func() {
os.Remove(f)
}()
testExport(t, f)
}
type testIterator struct {
index int
}
func newTestIterator() *testIterator {
return &testIterator{index: -1}
}
func (iter *testIterator) Next() (byte, []byte, []byte, bool) {
if iter.index >= 999 {
return 0, nil, nil, false
}
iter.index += 1
if iter.index == 42 {
iter.index += 1
}
return OpBatchAdd, []byte(fmt.Sprintf("key-%04d", iter.index)),
[]byte(fmt.Sprintf("value %d", iter.index)), true
}
func (iter *testIterator) Release() {}
func testExport(t *testing.T, f string) {
err := ExportChaindata(f, "testdata", newTestIterator(), make(chan struct{}))
if err != nil {
t.Fatal(err)
}
db := rawdb.NewMemoryDatabase()
err = ImportLDBData(db, f, 5, make(chan struct{}))
if err != nil {
t.Fatal(err)
}
// verify
for i := 0; i < 1000; i++ {
v, err := db.Get([]byte(fmt.Sprintf("key-%04d", i)))
if (i < 5 || i == 42) && err == nil {
t.Fatalf("expected no element at idx %d, got '%v'", i, string(v))
}
if !(i < 5 || i == 42) {
if err != nil {
t.Fatalf("expected element idx %d: %v", i, err)
}
if have, want := string(v), fmt.Sprintf("value %d", i); have != want {
t.Fatalf("have %v, want %v", have, want)
}
}
}
v, err := db.Get([]byte(fmt.Sprintf("key-%04d", 1000)))
if err == nil {
t.Fatalf("expected no element at idx %d, got '%v'", 1000, string(v))
}
}
// testDeletion tests if the deletion markers can be exported/imported correctly
func TestDeletionExport(t *testing.T) {
f := fmt.Sprintf("%v/tempdump", os.TempDir())
defer func() {
os.Remove(f)
}()
testDeletion(t, f)
}
// TestDeletionExportGzip tests if the deletion markers can be exported/imported
// correctly with gz compression.
func TestDeletionExportGzip(t *testing.T) {
f := fmt.Sprintf("%v/tempdump.gz", os.TempDir())
defer func() {
os.Remove(f)
}()
testDeletion(t, f)
}
type deletionIterator struct {
index int
}
func newDeletionIterator() *deletionIterator {
return &deletionIterator{index: -1}
}
func (iter *deletionIterator) Next() (byte, []byte, []byte, bool) {
if iter.index >= 999 {
return 0, nil, nil, false
}
iter.index += 1
if iter.index == 42 {
iter.index += 1
}
return OpBatchDel, []byte(fmt.Sprintf("key-%04d", iter.index)), nil, true
}
func (iter *deletionIterator) Release() {}
func testDeletion(t *testing.T, f string) {
err := ExportChaindata(f, "testdata", newDeletionIterator(), make(chan struct{}))
if err != nil {
t.Fatal(err)
}
db := rawdb.NewMemoryDatabase()
for i := 0; i < 1000; i++ {
db.Put([]byte(fmt.Sprintf("key-%04d", i)), []byte(fmt.Sprintf("value %d", i)))
}
err = ImportLDBData(db, f, 5, make(chan struct{}))
if err != nil {
t.Fatal(err)
}
for i := 0; i < 1000; i++ {
v, err := db.Get([]byte(fmt.Sprintf("key-%04d", i)))
if i < 5 || i == 42 {
if err != nil {
t.Fatalf("expected element at idx %d, got '%v'", i, err)
}
if have, want := string(v), fmt.Sprintf("value %d", i); have != want {
t.Fatalf("have %v, want %v", have, want)
}
}
if !(i < 5 || i == 42) {
if err == nil {
t.Fatalf("expected no element idx %d: %v", i, string(v))
}
}
}
}
// TestImportFutureFormat tests that we reject unsupported future versions.
func TestImportFutureFormat(t *testing.T) {
f := fmt.Sprintf("%v/tempdump-future", os.TempDir())
defer func() {
os.Remove(f)
}()
fh, err := os.OpenFile(f, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, os.ModePerm)
if err != nil {
t.Fatal(err)
}
defer fh.Close()
if err := rlp.Encode(fh, &exportHeader{
Magic: exportMagic,
Version: 500,
Kind: "testdata",
UnixTime: uint64(time.Now().Unix()),
}); err != nil {
t.Fatal(err)
}
db2 := rawdb.NewMemoryDatabase()
err = ImportLDBData(db2, f, 0, make(chan struct{}))
if err == nil {
t.Fatal("Expected error, got none")
}
if !strings.HasPrefix(err.Error(), "incompatible version") {
t.Fatalf("wrong error: %v", err)
}
}