// Tests that fast sync gets disabled as soon as a real block is successfully
// imported into the blockchain.
func TestFastSyncDisabling(t *testing.T) {
// Create a pristine protocol manager, check that fast sync is left enabled
pmEmpty := newTestProtocolManagerMust(t, true, 0, nil, nil)
if atomic.LoadUint32(&pmEmpty.fastSync) == 0 {
t.Fatalf("fast sync disabled on pristine blockchain")
}
// Create a full protocol manager, check that fast sync gets disabled
pmFull := newTestProtocolManagerMust(t, true, 1024, nil, nil)
if atomic.LoadUint32(&pmFull.fastSync) == 1 {
t.Fatalf("fast sync not disabled on non-empty blockchain")
}
// Sync up the two peers
io1, io2 := p2p.MsgPipe()
go pmFull.handle(pmFull.newPeer(63, p2p.NewPeer(discover.NodeID{}, "empty", nil), io2))
go pmEmpty.handle(pmEmpty.newPeer(63, p2p.NewPeer(discover.NodeID{}, "full", nil), io1))
time.Sleep(250 * time.Millisecond)
pmEmpty.synchronise(pmEmpty.peers.BestPeer())
// Check that fast sync was disabled
if atomic.LoadUint32(&pmEmpty.fastSync) == 1 {
t.Fatalf("fast sync not disabled after successful synchronisation")
}
}
// newTestPeer creates a new peer registered at the given protocol manager.
func newTestPeer(name string, version int, pm *ProtocolManager, shake bool) (*testPeer, <-chan error) {
// Create a message pipe to communicate through
app, net := p2p.MsgPipe()
// Generate a random id and create the peer
var id discover.NodeID
rand.Read(id[:])
peer := pm.newPeer(version, p2p.NewPeer(id, name, nil), net)
// Start the peer on a new thread
errc := make(chan error, 1)
go func() {
pm.newPeerCh <- peer
errc <- pm.handle(peer)
}()
tp := &testPeer{
app: app,
net: net,
peer: peer,
}
// Execute any implicitly requested handshakes and return
if shake {
td, head, genesis := pm.blockchain.Status()
tp.handshake(nil, td, head, genesis)
}
return tp, errc
}
func newTestPeer(pm *ProtocolManager) (*testPeer, <-chan error) {
var id discover.NodeID
rand.Read(id[:])
rw1, rw2 := p2p.MsgPipe()
peer := pm.newPeer(pm.protVer, pm.netId, p2p.NewPeer(id, "test peer", nil), rw2)
errc := make(chan error, 1)
go func() {
pm.newPeerCh <- peer
errc <- pm.handle(peer)
}()
return &testPeer{rw1, rw2, pm, peer}, errc
}
func startTestCluster(n int) []*Whisper {
// Create the batch of simulated peers
nodes := make([]*p2p.Peer, n)
for i := 0; i < n; i++ {
nodes[i] = p2p.NewPeer(discover.NodeID{}, "", nil)
}
whispers := make([]*Whisper, n)
for i := 0; i < n; i++ {
whispers[i] = New()
whispers[i].Start()
}
// Wire all the peers to the root one
for i := 1; i < n; i++ {
src, dst := p2p.MsgPipe()
go whispers[0].handlePeer(nodes[i], src)
go whispers[i].handlePeer(nodes[0], dst)
}
return whispers
}
func startTestPeer() *testPeer {
// Create a simulated P2P remote peer and data streams to it
remote := p2p.NewPeer(discover.NodeID{}, "", nil)
tester, tested := p2p.MsgPipe()
// Create a whisper client and connect with it to the tester peer
client := New()
client.Start()
termed := make(chan struct{})
go func() {
defer client.Stop()
defer close(termed)
defer tested.Close()
client.handlePeer(remote, tested)
}()
return &testPeer{
client: client,
stream: tester,
termed: termed,
}
}