mirror of https://github.com/ethereum/go-ethereum
Fix retrieval tests and simulation backends (#17723)
* swarm/network/stream: introduced visualized snapshot sync test * swarm/network/stream: non-existing hash visualization sim * swarm/network/stream: fixed retrieval tests; new backend for visualization * swarm/network/stream: cleanup of visualized_snapshot_sync_sim_test.go * swarm/network/stream: rebased PR on master * swarm/network/stream: fixed loop logic in retrieval tests * swarm/network/stream: fixed iterations for snapshot tests * swarm/network/stream: address PR comments * swarm/network/stream: addressed PR commentspull/18166/head
holisticode
6 years ago
committed by
Viktor Trón
parent
72a076840b
commit
11d0ff6578
@ -0,0 +1,225 @@ |
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// Copyright 2018 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// +build withserver
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package stream |
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import ( |
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"context" |
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"fmt" |
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"testing" |
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"time" |
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"github.com/ethereum/go-ethereum/p2p" |
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"github.com/ethereum/go-ethereum/p2p/discover" |
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"github.com/ethereum/go-ethereum/p2p/simulations" |
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"github.com/ethereum/go-ethereum/swarm/log" |
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"github.com/ethereum/go-ethereum/swarm/network/simulation" |
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"github.com/ethereum/go-ethereum/swarm/storage" |
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) |
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/* |
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The tests in this file need to be executed with |
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-tags=withserver |
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Also, they will stall if executed stand-alone, because they wait |
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for the visualization frontend to send a POST /runsim message. |
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*/ |
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//setup the sim, evaluate nodeCount and chunkCount and create the sim
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func setupSim(serviceMap map[string]simulation.ServiceFunc) (int, int, *simulation.Simulation) { |
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nodeCount := *nodes |
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chunkCount := *chunks |
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if nodeCount == 0 || chunkCount == 0 { |
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nodeCount = 32 |
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chunkCount = 1 |
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} |
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//setup the simulation with server, which means the sim won't run
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//until it receives a POST /runsim from the frontend
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sim := simulation.New(serviceMap).WithServer(":8888") |
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return nodeCount, chunkCount, sim |
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} |
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//watch for disconnections and wait for healthy
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func watchSim(sim *simulation.Simulation) (context.Context, context.CancelFunc) { |
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ctx, cancelSimRun := context.WithTimeout(context.Background(), 1*time.Minute) |
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if _, err := sim.WaitTillHealthy(ctx, 2); err != nil { |
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panic(err) |
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} |
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disconnections := sim.PeerEvents( |
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context.Background(), |
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sim.NodeIDs(), |
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simulation.NewPeerEventsFilter().Type(p2p.PeerEventTypeDrop), |
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) |
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go func() { |
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for d := range disconnections { |
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log.Error("peer drop", "node", d.NodeID, "peer", d.Event.Peer) |
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panic("unexpected disconnect") |
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cancelSimRun() |
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} |
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}() |
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return ctx, cancelSimRun |
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} |
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//This test requests bogus hashes into the network
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func TestNonExistingHashesWithServer(t *testing.T) { |
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nodeCount, _, sim := setupSim(retrievalSimServiceMap) |
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defer sim.Close() |
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err := sim.UploadSnapshot(fmt.Sprintf("testing/snapshot_%d.json", nodeCount)) |
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if err != nil { |
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panic(err) |
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} |
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ctx, cancelSimRun := watchSim(sim) |
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defer cancelSimRun() |
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//in order to get some meaningful visualization, it is beneficial
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//to define a minimum duration of this test
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testDuration := 20 * time.Second |
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result := sim.Run(ctx, func(ctx context.Context, sim *simulation.Simulation) error { |
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//check on the node's FileStore (netstore)
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id := sim.RandomUpNode().ID |
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item, ok := sim.NodeItem(id, bucketKeyFileStore) |
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if !ok { |
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t.Fatalf("No filestore") |
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} |
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fileStore := item.(*storage.FileStore) |
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//create a bogus hash
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fakeHash := storage.GenerateRandomChunk(1000).Address() |
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//try to retrieve it - will propagate RetrieveRequestMsg into the network
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reader, _ := fileStore.Retrieve(context.TODO(), fakeHash) |
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if _, err := reader.Size(ctx, nil); err != nil { |
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log.Debug("expected error for non-existing chunk") |
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} |
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//sleep so that the frontend can have something to display
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time.Sleep(testDuration) |
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return nil |
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}) |
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if result.Error != nil { |
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sendSimTerminatedEvent(sim) |
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t.Fatal(result.Error) |
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} |
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sendSimTerminatedEvent(sim) |
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} |
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//send a termination event to the frontend
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func sendSimTerminatedEvent(sim *simulation.Simulation) { |
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evt := &simulations.Event{ |
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Type: EventTypeSimTerminated, |
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Control: false, |
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} |
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sim.Net.Events().Send(evt) |
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} |
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//This test is the same as the snapshot sync test,
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//but with a HTTP server
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//It also sends some custom events so that the frontend
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//can visualize messages like SendOfferedMsg, WantedHashesMsg, DeliveryMsg
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func TestSnapshotSyncWithServer(t *testing.T) { |
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nodeCount, chunkCount, sim := setupSim(simServiceMap) |
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defer sim.Close() |
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log.Info("Initializing test config") |
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conf := &synctestConfig{} |
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//map of discover ID to indexes of chunks expected at that ID
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conf.idToChunksMap = make(map[discover.NodeID][]int) |
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//map of overlay address to discover ID
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conf.addrToIDMap = make(map[string]discover.NodeID) |
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//array where the generated chunk hashes will be stored
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conf.hashes = make([]storage.Address, 0) |
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err := sim.UploadSnapshot(fmt.Sprintf("testing/snapshot_%d.json", nodeCount)) |
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if err != nil { |
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panic(err) |
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} |
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ctx, cancelSimRun := watchSim(sim) |
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defer cancelSimRun() |
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//setup filters in the event feed
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offeredHashesFilter := simulation.NewPeerEventsFilter().Type(p2p.PeerEventTypeMsgRecv).Protocol("stream").MsgCode(1) |
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wantedFilter := simulation.NewPeerEventsFilter().Type(p2p.PeerEventTypeMsgRecv).Protocol("stream").MsgCode(2) |
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deliveryFilter := simulation.NewPeerEventsFilter().Type(p2p.PeerEventTypeMsgRecv).Protocol("stream").MsgCode(6) |
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eventC := sim.PeerEvents(ctx, sim.UpNodeIDs(), offeredHashesFilter, wantedFilter, deliveryFilter) |
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quit := make(chan struct{}) |
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go func() { |
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for e := range eventC { |
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select { |
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case <-quit: |
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fmt.Println("quitting event loop") |
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return |
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default: |
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} |
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if e.Error != nil { |
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t.Fatal(e.Error) |
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} |
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if *e.Event.MsgCode == uint64(1) { |
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evt := &simulations.Event{ |
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Type: EventTypeChunkOffered, |
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Node: sim.Net.GetNode(e.NodeID), |
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Control: false, |
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} |
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sim.Net.Events().Send(evt) |
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} else if *e.Event.MsgCode == uint64(2) { |
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evt := &simulations.Event{ |
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Type: EventTypeChunkWanted, |
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Node: sim.Net.GetNode(e.NodeID), |
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Control: false, |
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} |
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sim.Net.Events().Send(evt) |
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} else if *e.Event.MsgCode == uint64(6) { |
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evt := &simulations.Event{ |
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Type: EventTypeChunkDelivered, |
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Node: sim.Net.GetNode(e.NodeID), |
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Control: false, |
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} |
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sim.Net.Events().Send(evt) |
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} |
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} |
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}() |
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//run the sim
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result := runSim(conf, ctx, sim, chunkCount) |
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//send terminated event
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evt := &simulations.Event{ |
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Type: EventTypeSimTerminated, |
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Control: false, |
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} |
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sim.Net.Events().Send(evt) |
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if result.Error != nil { |
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panic(result.Error) |
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} |
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close(quit) |
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log.Info("Simulation ended") |
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} |
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