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package blockchain
import (
"math/rand"
"testing"
"time"
. "github.com/tendermint/tendermint/common"
"github.com/tendermint/tendermint/types"
)
type testPeer struct {
id string
height uint
}
func makePeers(numPeers int, minHeight, maxHeight uint) map[string]testPeer {
peers := make(map[string]testPeer, numPeers)
for i := 0; i < numPeers; i++ {
peerId := RandStr(12)
height := minHeight + uint(rand.Intn(int(maxHeight-minHeight)))
peers[peerId] = testPeer{peerId, height}
}
return peers
}
func TestBasic(t *testing.T) {
peers := makePeers(10, 0, 1000)
start := uint(42)
timeoutsCh := make(chan string, 100)
requestsCh := make(chan BlockRequest, 100)
pool := NewBlockPool(start, requestsCh, timeoutsCh)
pool.Start()
// Introduce each peer.
go func() {
for _, peer := range peers {
pool.SetPeerHeight(peer.id, peer.height)
}
}()
// Start a goroutine to pull blocks
go func() {
for {
if !pool.IsRunning() {
return
}
first, second := pool.PeekTwoBlocks()
if first != nil && second != nil {
pool.PopRequest()
} else {
time.Sleep(1 * time.Second)
}
}
}()
// Pull from channels
for {
select {
case peerId := <-timeoutsCh:
t.Errorf("timeout: %v", peerId)
case request := <-requestsCh:
log.Debug("TEST: Pulled new BlockRequest", "request", request)
if request.Height == 300 {
return // Done!
}
// Request desired, pretend like we got the block immediately.
go func() {
block := &types.Block{Header: &types.Header{Height: request.Height}}
pool.AddBlock(block, request.PeerId)
log.Debug("TEST: Added block", "block", request.Height, "peer", request.PeerId)
}()
}
}
pool.Stop()
}
func TestTimeout(t *testing.T) {
peers := makePeers(10, 0, 1000)
start := uint(42)
timeoutsCh := make(chan string, 100)
requestsCh := make(chan BlockRequest, 100)
pool := NewBlockPool(start, requestsCh, timeoutsCh)
pool.Start()
// Introduce each peer.
go func() {
for _, peer := range peers {
pool.SetPeerHeight(peer.id, peer.height)
}
}()
// Start a goroutine to pull blocks
go func() {
for {
if !pool.IsRunning() {
return
}
first, second := pool.PeekTwoBlocks()
if first != nil && second != nil {
pool.PopRequest()
} else {
time.Sleep(1 * time.Second)
}
}
}()
// Pull from channels
counter := 0
timedOut := map[string]struct{}{}
for {
select {
case peerId := <-timeoutsCh:
log.Debug("Timeout", "peerId", peerId)
if _, ok := timedOut[peerId]; !ok {
counter++
if counter == len(peers) {
return // Done!
}
}
case request := <-requestsCh:
log.Debug("TEST: Pulled new BlockRequest", "request", request)
}
}
pool.Stop()
}