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146 lines
4.4 KiB
146 lines
4.4 KiB
// 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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package simulation
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import (
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"context"
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"sync"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/node"
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"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
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"github.com/ethereum/go-ethereum/swarm/network"
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)
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/*
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TestWaitTillHealthy tests that we indeed get a healthy network after we wait for it.
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For this to be tested, a bit of a snake tail bite needs to happen:
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* First we create a first simulation
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* Run it as nodes connected in a ring
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* Wait until the network is healthy
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* Then we create a snapshot
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* With this snapshot we create a new simulation
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* This simulation is expected to have a healthy configuration, as it uses the snapshot
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* Thus we just iterate all nodes and check that their kademlias are healthy
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* If all kademlias are healthy, the test succeeded, otherwise it failed
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*/
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func TestWaitTillHealthy(t *testing.T) {
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testNodesNum := 10
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// create the first simulation
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sim := New(createSimServiceMap(true))
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// connect and...
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nodeIDs, err := sim.AddNodesAndConnectRing(testNodesNum)
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if err != nil {
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t.Fatal(err)
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}
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// array of all overlay addresses
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var addrs [][]byte
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// iterate once to be able to build the peer map
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for _, node := range nodeIDs {
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//get the kademlia overlay address from this ID
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a := node.Bytes()
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//append it to the array of all overlay addresses
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addrs = append(addrs, a)
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}
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// build a PeerPot only once
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pp := network.NewPeerPotMap(network.NewKadParams().NeighbourhoodSize, addrs)
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ctx, cancel := context.WithTimeout(context.Background(), 120*time.Second)
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defer cancel()
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// ...wait until healthy
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ill, err := sim.WaitTillHealthy(ctx)
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if err != nil {
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for id, kad := range ill {
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t.Log("Node", id)
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t.Log(kad.String())
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}
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t.Fatal(err)
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}
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// now create a snapshot of this network
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snap, err := sim.Net.Snapshot()
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if err != nil {
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t.Fatal(err)
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}
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// close the initial simulation
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sim.Close()
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// create a control simulation
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controlSim := New(createSimServiceMap(false))
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defer controlSim.Close()
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// load the snapshot into this control simulation
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err = controlSim.Net.Load(snap)
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if err != nil {
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t.Fatal(err)
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}
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_, err = controlSim.WaitTillHealthy(ctx)
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if err != nil {
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t.Fatal(err)
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}
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for _, node := range nodeIDs {
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// ...get its kademlia
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item, ok := controlSim.NodeItem(node, BucketKeyKademlia)
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if !ok {
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t.Fatal("No kademlia bucket item")
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}
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kad := item.(*network.Kademlia)
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// get its base address
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kid := common.Bytes2Hex(kad.BaseAddr())
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//get the health info
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info := kad.GetHealthInfo(pp[kid])
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log.Trace("Health info", "info", info)
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// check that it is healthy
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healthy := info.Healthy()
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if !healthy {
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t.Fatalf("Expected node %v of control simulation to be healthy, but it is not, unhealthy kademlias: %v", node, kad.String())
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}
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}
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}
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// createSimServiceMap returns the services map
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// this function will create the sim services with or without discovery enabled
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// based on the flag passed
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func createSimServiceMap(discovery bool) map[string]ServiceFunc {
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return map[string]ServiceFunc{
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"bzz": func(ctx *adapters.ServiceContext, b *sync.Map) (node.Service, func(), error) {
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addr := network.NewAddr(ctx.Config.Node())
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hp := network.NewHiveParams()
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hp.Discovery = discovery
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config := &network.BzzConfig{
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OverlayAddr: addr.Over(),
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UnderlayAddr: addr.Under(),
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HiveParams: hp,
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}
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kad := network.NewKademlia(addr.Over(), network.NewKadParams())
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// store kademlia in node's bucket under BucketKeyKademlia
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// so that it can be found by WaitTillHealthy method.
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b.Store(BucketKeyKademlia, kad)
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return network.NewBzz(config, kad, nil, nil, nil), nil, nil
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},
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}
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}
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