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package blockpool
import (
"math/big"
"testing"
"time"
"github.com/ethereum/go-ethereum/blockpool/test"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
)
// the actual tests
func TestAddPeer(t *testing.T) {
test.LogInit()
_, blockPool, blockPoolTester := newTestBlockPool(t)
peer0 := blockPoolTester.newPeer("peer0", 1, 1)
peer1 := blockPoolTester.newPeer("peer1", 2, 2)
peer2 := blockPoolTester.newPeer("peer2", 3, 3)
var bestpeer *peer
blockPool.Start()
// pool
best := peer0.AddPeer()
if !best {
t.Errorf("peer0 (TD=1) not accepted as best")
}
if blockPool.peers.best.id != "peer0" {
t.Errorf("peer0 (TD=1) not set as best")
}
best = peer2.AddPeer()
if !best {
t.Errorf("peer2 (TD=3) not accepted as best")
}
if blockPool.peers.best.id != "peer2" {
t.Errorf("peer2 (TD=3) not set as best")
}
peer2.waitBlocksRequests(3)
best = peer1.AddPeer()
if best {
t.Errorf("peer1 (TD=2) accepted as best")
}
if blockPool.peers.best.id != "peer2" {
t.Errorf("peer2 (TD=3) not set any more as best")
}
if blockPool.peers.best.td.Cmp(big.NewInt(int64(3))) != 0 {
t.Errorf("peer1 TD not set")
}
peer2.td = 4
peer2.currentBlock = 4
best = peer2.AddPeer()
if !best {
t.Errorf("peer2 (TD=4) not accepted as best")
}
if blockPool.peers.best.id != "peer2" {
t.Errorf("peer2 (TD=4) not set as best")
}
if blockPool.peers.best.td.Cmp(big.NewInt(int64(4))) != 0 {
t.Errorf("peer2 TD not updated")
}
peer2.waitBlocksRequests(4)
peer1.td = 3
peer1.currentBlock = 3
best = peer1.AddPeer()
if best {
t.Errorf("peer1 (TD=3) should not be set as best")
}
if blockPool.peers.best.id == "peer1" {
t.Errorf("peer1 (TD=3) should not be set as best")
}
bestpeer, best = blockPool.peers.getPeer("peer1")
if bestpeer.td.Cmp(big.NewInt(int64(3))) != 0 {
t.Errorf("peer1 TD should be updated")
}
blockPool.RemovePeer("peer2")
bestpeer, best = blockPool.peers.getPeer("peer2")
if bestpeer != nil {
t.Errorf("peer2 not removed")
}
if blockPool.peers.best.id != "peer1" {
t.Errorf("existing peer1 (TD=3) should be set as best peer")
}
peer1.waitBlocksRequests(3)
blockPool.RemovePeer("peer1")
bestpeer, best = blockPool.peers.getPeer("peer1")
if bestpeer != nil {
t.Errorf("peer1 not removed")
}
if blockPool.peers.best.id != "peer0" {
t.Errorf("existing peer0 (TD=1) should be set as best peer")
}
peer0.waitBlocksRequests(1)
blockPool.RemovePeer("peer0")
bestpeer, best = blockPool.peers.getPeer("peer0")
if bestpeer != nil {
t.Errorf("peer1 not removed")
}
// adding back earlier peer ok
peer0.currentBlock = 3
best = peer0.AddPeer()
if !best {
t.Errorf("peer0 (TD=1) should be set as best")
}
if blockPool.peers.best.id != "peer0" {
t.Errorf("peer0 (TD=1) should be set as best")
}
peer0.waitBlocksRequests(3)
newblock := &types.Block{Td: common.Big3}
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")
}
best = peer1.AddPeer()
if blockPool.peers.best != nil {
t.Errorf("still no peer should be ahead of self")
}
best = peer2.AddPeer()
if !best {
t.Errorf("peer2 (TD=4) not accepted as best")
}
blockPool.RemovePeer("peer2")
if blockPool.peers.best != nil {
t.Errorf("no peer should be ahead of self")
}
blockPool.Stop()
}
func TestPeerPromotionByOptionalTdOnBlock(t *testing.T) {
test.LogInit()
_, 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()
blockPoolTester.tds = make(map[int]int)
blockPoolTester.tds[3] = 3
// pool
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")
}
best = peer2.AddPeer()
peer2.serveBlocks(3, 4)
peer2.serveBlockHashes(4, 3, 2, 1)
hashes := blockPoolTester.hashPool.IndexesToHashes([]int{2, 3})
peer1.waitBlocksRequests(3)
blockPool.AddBlock(&types.Block{
HeaderHash: common.Bytes(hashes[1]),
ParentHeaderHash: common.Bytes(hashes[0]),
Td: common.Big3,
}, "peer1")
blockPool.RemovePeer("peer2")
if blockPool.peers.best.id != "peer1" {
t.Errorf("peer1 (TD=3) should be set as best")
}
peer1.serveBlocks(0, 1, 2)
blockPool.Wait(waitTimeout)
blockPool.Stop()
blockPoolTester.refBlockChain[4] = []int{}
blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
}
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