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// Copyright 2018 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 (
"context"
"encoding/hex"
"errors"
"io/ioutil"
"testing"
"time"
"github.com/ethereum/go-ethereum/swarm/network"
)
var (
errUnknown = errors.New("unknown error")
)
type mockRetrieve struct {
requests map[string]int
}
func NewMockRetrieve() *mockRetrieve {
return &mockRetrieve{requests: make(map[string]int)}
}
func newDummyChunk(addr Address) *Chunk {
chunk := NewChunk(addr, make(chan bool))
chunk.SData = []byte{3, 4, 5}
chunk.Size = 3
return chunk
}
func (m *mockRetrieve) retrieve(ctx context.Context, chunk *Chunk) error {
hkey := hex.EncodeToString(chunk.Addr)
m.requests[hkey] += 1
// on second call return error
if m.requests[hkey] == 2 {
return errUnknown
}
// on third call return data
if m.requests[hkey] == 3 {
*chunk = *newDummyChunk(chunk.Addr)
go func() {
time.Sleep(100 * time.Millisecond)
close(chunk.ReqC)
}()
return nil
}
return nil
}
func TestNetstoreFailedRequest(t *testing.T) {
searchTimeout = 300 * time.Millisecond
// setup
addr := network.RandomAddr() // tested peers peer address
// temp datadir
datadir, err := ioutil.TempDir("", "netstore")
if err != nil {
t.Fatal(err)
}
params := NewDefaultLocalStoreParams()
params.Init(datadir)
params.BaseKey = addr.Over()
localStore, err := NewTestLocalStoreForAddr(params)
if err != nil {
t.Fatal(err)
}
r := NewMockRetrieve()
netStore := NewNetStore(localStore, r.retrieve)
key := Address{}
// first call is done by the retry on ErrChunkNotFound, no need to do it here
// _, err = netStore.Get(key)
// if err == nil || err != ErrChunkNotFound {
// t.Fatalf("expected to get ErrChunkNotFound, but got: %s", err)
// }
// second call
_, err = netStore.Get(context.TODO(), key)
if got := r.requests[hex.EncodeToString(key)]; got != 2 {
t.Fatalf("expected to have called retrieve two times, but got: %v", got)
}
if err != errUnknown {
t.Fatalf("expected to get an unknown error, but got: %s", err)
}
// third call
chunk, err := netStore.Get(context.TODO(), key)
if got := r.requests[hex.EncodeToString(key)]; got != 3 {
t.Fatalf("expected to have called retrieve three times, but got: %v", got)
}
if err != nil || chunk == nil {
t.Fatalf("expected to get a chunk but got: %v, %s", chunk, err)
}
if len(chunk.SData) != 3 {
t.Fatalf("expected to get a chunk with size 3, but got: %v", chunk.SData)
}
}