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// 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"
"crypto/rand"
"fmt"
"io"
"sync"
"testing"
"github.com/ethereum/go-ethereum/log"
)
type brokenLimitedReader struct {
lr io.Reader
errAt int
off int
size int
}
func brokenLimitReader(data io.Reader, size int, errAt int) *brokenLimitedReader {
return &brokenLimitedReader{
lr: data,
errAt: errAt,
size: size,
}
}
func testDataReader(l int) (r io.Reader) {
return io.LimitReader(rand.Reader, int64(l))
}
func (self *brokenLimitedReader) Read(buf []byte) (int, error) {
if self.off+len(buf) > self.errAt {
return 0, fmt.Errorf("Broken reader")
}
self.off += len(buf)
return self.lr.Read(buf)
}
func testDataReaderAndSlice(l int) (r io.Reader, slice []byte) {
slice = make([]byte, l)
if _, err := rand.Read(slice); err != nil {
panic("rand error")
}
r = io.LimitReader(bytes.NewReader(slice), int64(l))
return
}
func testStore(m ChunkStore, l int64, branches int64, t *testing.T) {
chunkC := make(chan *Chunk)
go func() {
for chunk := range chunkC {
m.Put(chunk)
if chunk.wg != nil {
chunk.wg.Done()
}
}
}()
chunker := NewTreeChunker(&ChunkerParams{
Branches: branches,
Hash: SHA3Hash,
})
swg := &sync.WaitGroup{}
key, _ := chunker.Split(rand.Reader, l, chunkC, swg, nil)
swg.Wait()
close(chunkC)
chunkC = make(chan *Chunk)
quit := make(chan bool)
go func() {
for ch := range chunkC {
go func(chunk *Chunk) {
storedChunk, err := m.Get(chunk.Key)
if err == notFound {
log.Trace(fmt.Sprintf("chunk '%v' not found", chunk.Key.Log()))
} else if err != nil {
log.Trace(fmt.Sprintf("error retrieving chunk %v: %v", chunk.Key.Log(), err))
} else {
chunk.SData = storedChunk.SData
chunk.Size = storedChunk.Size
}
log.Trace(fmt.Sprintf("chunk '%v' not found", chunk.Key.Log()))
close(chunk.C)
}(ch)
}
close(quit)
}()
r := chunker.Join(key, chunkC)
b := make([]byte, l)
n, err := r.ReadAt(b, 0)
if err != io.EOF {
t.Fatalf("read error (%v/%v) %v", n, l, err)
}
close(chunkC)
<-quit
}
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