118 lines
2.8 KiB
Go
118 lines
2.8 KiB
Go
// Copyright 2016 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package storage
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import (
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"bytes"
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"crypto/rand"
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"io"
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"sync"
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"testing"
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"github.com/ethereum/go-ethereum/logger"
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"github.com/ethereum/go-ethereum/logger/glog"
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)
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type limitedReader struct {
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r io.Reader
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off int64
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size int64
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}
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func limitReader(r io.Reader, size int) *limitedReader {
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return &limitedReader{r, 0, int64(size)}
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}
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func (self *limitedReader) Read(buf []byte) (int, error) {
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limit := int64(len(buf))
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left := self.size - self.off
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if limit >= left {
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limit = left
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}
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n, err := self.r.Read(buf[:limit])
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if err == nil && limit == left {
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err = io.EOF
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}
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self.off += int64(n)
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return n, err
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}
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func testDataReader(l int) (r io.Reader) {
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return limitReader(rand.Reader, l)
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}
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func testDataReaderAndSlice(l int) (r io.Reader, slice []byte) {
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slice = make([]byte, l)
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if _, err := rand.Read(slice); err != nil {
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panic("rand error")
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}
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r = limitReader(bytes.NewReader(slice), l)
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return
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}
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func testStore(m ChunkStore, l int64, branches int64, t *testing.T) {
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chunkC := make(chan *Chunk)
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go func() {
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for chunk := range chunkC {
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m.Put(chunk)
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if chunk.wg != nil {
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chunk.wg.Done()
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}
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}
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}()
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chunker := NewTreeChunker(&ChunkerParams{
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Branches: branches,
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Hash: defaultHash,
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})
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swg := &sync.WaitGroup{}
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key, err := chunker.Split(rand.Reader, l, chunkC, swg, nil)
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swg.Wait()
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close(chunkC)
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chunkC = make(chan *Chunk)
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quit := make(chan bool)
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go func() {
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for ch := range chunkC {
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go func(chunk *Chunk) {
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storedChunk, err := m.Get(chunk.Key)
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if err == notFound {
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glog.V(logger.Detail).Infof("chunk '%v' not found", chunk.Key.Log())
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} else if err != nil {
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glog.V(logger.Detail).Infof("error retrieving chunk %v: %v", chunk.Key.Log(), err)
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} else {
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chunk.SData = storedChunk.SData
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chunk.Size = storedChunk.Size
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}
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glog.V(logger.Detail).Infof("chunk '%v' not found", chunk.Key.Log())
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close(chunk.C)
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}(ch)
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}
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close(quit)
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}()
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r := chunker.Join(key, chunkC)
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b := make([]byte, l)
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n, err := r.ReadAt(b, 0)
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if err != io.EOF {
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t.Fatalf("read error (%v/%v) %v", n, l, err)
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}
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close(chunkC)
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<-quit
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}
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