// Copyright 2016 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 storage
import (
"bytes"
"io"
"io/ioutil"
"os"
"sync"
"testing"
)
const testDataSize = 0x1000000
func TestDPArandom(t *testing.T) {
dbStore := initDbStore(t)
dbStore.setCapacity(50000)
memStore := NewMemStore(dbStore, defaultCacheCapacity)
localStore := &LocalStore{
memStore,
dbStore,
}
chunker := NewTreeChunker(NewChunkerParams())
dpa := &DPA{
Chunker: chunker,
ChunkStore: localStore,
}
dpa.Start()
defer dpa.Stop()
defer os.RemoveAll("/tmp/bzz")
reader, slice := testDataReaderAndSlice(testDataSize)
wg := &sync.WaitGroup{}
key, err := dpa.Store(reader, testDataSize, wg, nil)
if err != nil {
t.Errorf("Store error: %v", err)
}
wg.Wait()
resultReader := dpa.Retrieve(key)
resultSlice := make([]byte, len(slice))
n, err := resultReader.ReadAt(resultSlice, 0)
if err != io.EOF {
t.Errorf("Retrieve error: %v", err)
}
if n != len(slice) {
t.Errorf("Slice size error got %d, expected %d.", n, len(slice))
}
if !bytes.Equal(slice, resultSlice) {
t.Errorf("Comparison error.")
}
ioutil.WriteFile("/tmp/slice.bzz.16M", slice, 0666)
ioutil.WriteFile("/tmp/result.bzz.16M", resultSlice, 0666)
localStore.memStore = NewMemStore(dbStore, defaultCacheCapacity)
resultReader = dpa.Retrieve(key)
for i := range resultSlice {
resultSlice[i] = 0
}
n, err = resultReader.ReadAt(resultSlice, 0)
if err != io.EOF {
t.Errorf("Retrieve error after removing memStore: %v", err)
}
if n != len(slice) {
t.Errorf("Slice size error after removing memStore got %d, expected %d.", n, len(slice))
}
if !bytes.Equal(slice, resultSlice) {
t.Errorf("Comparison error after removing memStore.")
}
}
func TestDPA_capacity(t *testing.T) {
dbStore := initDbStore(t)
memStore := NewMemStore(dbStore, defaultCacheCapacity)
localStore := &LocalStore{
memStore,
dbStore,
}
memStore.setCapacity(0)
chunker := NewTreeChunker(NewChunkerParams())
dpa := &DPA{
Chunker: chunker,
ChunkStore: localStore,
}
dpa.Start()
reader, slice := testDataReaderAndSlice(testDataSize)
wg := &sync.WaitGroup{}
key, err := dpa.Store(reader, testDataSize, wg, nil)
if err != nil {
t.Errorf("Store error: %v", err)
}
wg.Wait()
resultReader := dpa.Retrieve(key)
resultSlice := make([]byte, len(slice))
n, err := resultReader.ReadAt(resultSlice, 0)
if err != io.EOF {
t.Errorf("Retrieve error: %v", err)
}
if n != len(slice) {
t.Errorf("Slice size error got %d, expected %d.", n, len(slice))
}
if !bytes.Equal(slice, resultSlice) {
t.Errorf("Comparison error.")
}
// Clear memStore
memStore.setCapacity(0)
// check whether it is, indeed, empty
dpa.ChunkStore = memStore
resultReader = dpa.Retrieve(key)
if _, err = resultReader.ReadAt(resultSlice, 0); err == nil {
t.Errorf("Was able to read %d bytes from an empty memStore.", len(slice))
}
// check how it works with localStore
dpa.ChunkStore = localStore
// localStore.dbStore.setCapacity(0)
resultReader = dpa.Retrieve(key)
for i := range resultSlice {
resultSlice[i] = 0
}
n, err = resultReader.ReadAt(resultSlice, 0)
if err != io.EOF {
t.Errorf("Retrieve error after clearing memStore: %v", err)
}
if n != len(slice) {
t.Errorf("Slice size error after clearing memStore got %d, expected %d.", n, len(slice))
}
if !bytes.Equal(slice, resultSlice) {
t.Errorf("Comparison error after clearing memStore.")
}
}
