package blockchain import ( "math/rand" "testing" "time" . "github.com/tendermint/go-common" "github.com/tendermint/tendermint/types" ) type testPeer struct { id string height int } func makePeers(numPeers int, minHeight, maxHeight int) map[string]testPeer { peers := make(map[string]testPeer, numPeers) for i := 0; i < numPeers; i++ { peerID := RandStr(12) height := minHeight + rand.Intn(maxHeight-minHeight) peers[peerID] = testPeer{peerID, height} } return peers } func TestBasic(t *testing.T) { start := 42 peers := makePeers(10, start+1, 1000) 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.Info("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(request.PeerID, block, 123) log.Info("TEST: Added block", "block", request.Height, "peer", request.PeerID) }() } } pool.Stop() } func TestTimeout(t *testing.T) { start := 42 peers := makePeers(10, start+1, 1000) timeoutsCh := make(chan string, 100) requestsCh := make(chan BlockRequest, 100) pool := NewBlockPool(start, requestsCh, timeoutsCh) pool.Start() for _, peer := range peers { log.Info("Peer", "id", peer.id) } // 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.Info("Timeout", "peerID", peerID) if _, ok := timedOut[peerID]; !ok { counter++ if counter == len(peers) { return // Done! } } case request := <-requestsCh: log.Info("TEST: Pulled new BlockRequest", "request", request) } } pool.Stop() }