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package blockpool
import (
"flag"
"math/big"
"testing"
"time"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
)
var (
_ = flag.Set("alsologtostderr", "true")
// _ = flag.Set("log_dir", ".")
_ = flag.Set("v", "5")
)
// the actual tests
func TestAddPeer(t *testing.T) {
glog.V(logger.Error).Infoln("logging...")
hashPool, blockPool, blockPoolTester := newTestBlockPool(t)
peer0 := blockPoolTester.newPeer("peer0", 2, 2)
peer1 := blockPoolTester.newPeer("peer1", 4, 4)
peer2 := blockPoolTester.newPeer("peer2", 6, 6)
var bestpeer *peer
blockPool.Start()
// pool
best := peer0.AddPeer()
if !best {
t.Errorf("peer0 (TD=2) not accepted as best")
return
}
if blockPool.peers.best.id != "peer0" {
t.Errorf("peer0 (TD=2) not set as best")
return
}
peer0.serveBlocks(1, 2)
best = peer2.AddPeer()
if !best {
t.Errorf("peer2 (TD=6) not accepted as best")
return
}
if blockPool.peers.best.id != "peer2" {
t.Errorf("peer2 (TD=6) not set as best")
return
}
peer2.serveBlocks(5, 6)
best = peer1.AddPeer()
if best {
t.Errorf("peer1 (TD=4) accepted as best")
return
}
if blockPool.peers.best.id != "peer2" {
t.Errorf("peer2 (TD=6) not set any more as best")
return
}
if blockPool.peers.best.td.Cmp(big.NewInt(int64(6))) != 0 {
t.Errorf("peer2 TD=6 not set")
return
}
peer2.td = 8
peer2.currentBlock = 8
best = peer2.AddPeer()
if !best {
t.Errorf("peer2 (TD=8) not accepted as best")
return
}
if blockPool.peers.best.id != "peer2" {
t.Errorf("peer2 (TD=8) not set as best")
return
}
if blockPool.peers.best.td.Cmp(big.NewInt(int64(8))) != 0 {
t.Errorf("peer2 TD = 8 not updated")
return
}
peer1.td = 6
peer1.currentBlock = 6
best = peer1.AddPeer()
if best {
t.Errorf("peer1 (TD=6) should not be set as best")
return
}
if blockPool.peers.best.id == "peer1" {
t.Errorf("peer1 (TD=6) should not be set as best")
return
}
bestpeer, best = blockPool.peers.getPeer("peer1")
if bestpeer.td.Cmp(big.NewInt(int64(6))) != 0 {
t.Errorf("peer1 TD=6 should be updated")
return
}
blockPool.RemovePeer("peer2")
bestpeer, best = blockPool.peers.getPeer("peer2")
if bestpeer != nil {
t.Errorf("peer2 not removed")
return
}
if blockPool.peers.best.id != "peer1" {
t.Errorf("existing peer1 (TD=6) should be set as best peer")
return
}
blockPool.RemovePeer("peer1")
bestpeer, best = blockPool.peers.getPeer("peer1")
if bestpeer != nil {
t.Errorf("peer1 not removed")
return
}
if blockPool.peers.best.id != "peer0" {
t.Errorf("existing peer0 (TD=2) should be set as best peer")
return
}
blockPool.RemovePeer("peer0")
bestpeer, best = blockPool.peers.getPeer("peer0")
if bestpeer != nil {
t.Errorf("peer0 not removed")
return
}
// adding back earlier peer ok
peer0.currentBlock = 5
peer0.td = 5
best = peer0.AddPeer()
if !best {
t.Errorf("peer0 (TD=5) should be set as best")
return
}
if blockPool.peers.best.id != "peer0" {
t.Errorf("peer0 (TD=5) should be set as best")
return
}
peer0.serveBlocks(4, 5)
hash := hashPool.IndexesToHashes([]int{6})[0]
newblock := &types.Block{Td: big.NewInt(int64(6)), HeaderHash: hash}
blockPool.chainEvents.Post(core.ChainHeadEvent{newblock})
time.Sleep(100 * time.Millisecond)
if blockPool.peers.best != nil {
t.Errorf("no peer should be ahead of self")
return
}
best = peer1.AddPeer()
if blockPool.peers.best != nil {
t.Errorf("after peer1 (TD=6) still no peer should be ahead of self")
return
}
best = peer2.AddPeer()
if !best {
t.Errorf("peer2 (TD=8) not accepted as best")
return
}
blockPool.RemovePeer("peer2")
if blockPool.peers.best != nil {
t.Errorf("no peer should be ahead of self")
return
}
blockPool.Stop()
}
func TestPeerPromotionByTdOnBlock(t *testing.T) {
_, blockPool, blockPoolTester := newTestBlockPool(t)
blockPoolTester.blockChain[0] = nil
blockPoolTester.initRefBlockChain(4)
peer0 := blockPoolTester.newPeer("peer0", 2, 2)
peer1 := blockPoolTester.newPeer("peer1", 1, 1)
peer2 := blockPoolTester.newPeer("peer2", 4, 4)
blockPool.Start()
peer0.AddPeer()
peer0.serveBlocks(1, 2)
best := peer1.AddPeer()
// this tests that peer1 is not promoted over peer0 yet
if best {
t.Errorf("peer1 (TD=1) should not be set as best")
return
}
best = peer2.AddPeer()
peer2.serveBlocks(3, 4)
peer2.serveBlockHashes(4, 3, 2, 1)
peer1.sendBlocks(3, 4)
blockPool.RemovePeer("peer2")
if blockPool.peers.best.id != "peer1" {
t.Errorf("peer1 (TD=3) should be set as best")
return
}
peer1.serveBlocks(0, 1, 2, 3)
blockPool.Wait(waitTimeout)
blockPool.Stop()
blockPoolTester.refBlockChain[4] = []int{}
blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
}
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