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// Copyright 2017 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 bloombits
import (
"bytes"
"encoding/binary"
"math/rand"
"sync"
"sync/atomic"
"testing"
"time"
)
const testFetcherReqCount = 5000
func fetcherTestVector(b uint, s uint64) []byte {
r := make([]byte, 10)
binary.BigEndian.PutUint16(r[0:2], uint16(b))
binary.BigEndian.PutUint64(r[2:10], s)
return r
}
func TestFetcher(t *testing.T) {
testFetcher(t, 1)
}
func TestFetcherMultipleReaders(t *testing.T) {
testFetcher(t, 10)
}
func testFetcher(t *testing.T, cnt int) {
f := &fetcher{
requestMap: make(map[uint64]fetchRequest),
}
distCh := make(chan distRequest, channelCap)
stop := make(chan struct{})
var reqCount uint32
for i := 0; i < 10; i++ {
go func() {
for {
req, ok := <-distCh
if !ok {
return
}
time.Sleep(time.Duration(rand.Intn(100000)))
atomic.AddUint32(&reqCount, 1)
f.deliver([]uint64{req.sectionIndex}, [][]byte{fetcherTestVector(req.bloomIndex, req.sectionIndex)})
}
}()
}
var wg, wg2 sync.WaitGroup
for cc := 0; cc < cnt; cc++ {
wg.Add(1)
in := make(chan uint64, channelCap)
out := f.fetch(in, distCh, stop, &wg2)
time.Sleep(time.Millisecond * 10 * time.Duration(cc))
go func() {
for i := uint64(0); i < testFetcherReqCount; i++ {
in <- i
}
}()
go func() {
for i := uint64(0); i < testFetcherReqCount; i++ {
bv := <-out
if !bytes.Equal(bv, fetcherTestVector(0, i)) {
if len(bv) != 10 {
t.Errorf("Vector #%d length is %d, expected 10", i, len(bv))
} else {
j := binary.BigEndian.Uint64(bv[2:10])
t.Errorf("Expected vector #%d, fetched #%d", i, j)
}
}
}
wg.Done()
}()
}
wg.Wait()
close(stop)
if reqCount != testFetcherReqCount {
t.Errorf("Request count mismatch: expected %v, got %v", testFetcherReqCount, reqCount)
}
}
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