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- // Copyright 2018 The go-ethereum Authors
- // This file is part of the go-ethereum library.
- //
- // The go-ethereum library is free software: you can redistribute it and/or modify
- // it under the terms of the GNU Lesser General Public License as published by
- // the Free Software Foundation, either version 3 of the License, or
- // (at your option) any later version.
- //
- // The go-ethereum library is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- // GNU Lesser General Public License for more details.
- //
- // You should have received a copy of the GNU Lesser General Public License
- // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
- package simulations
- import (
- "testing"
- "github.com/ethereum/go-ethereum/node"
- "github.com/ethereum/go-ethereum/p2p/enode"
- "github.com/ethereum/go-ethereum/p2p/simulations/adapters"
- )
- func newTestNetwork(t *testing.T, nodeCount int) (*Network, []enode.ID) {
- t.Helper()
- adapter := adapters.NewSimAdapter(adapters.LifecycleConstructors{
- "noopwoop": func(ctx *adapters.ServiceContext, stack *node.Node) (node.Lifecycle, error) {
- return NewNoopService(nil), nil
- },
- })
- // create network
- network := NewNetwork(adapter, &NetworkConfig{
- DefaultService: "noopwoop",
- })
- // create and start nodes
- ids := make([]enode.ID, nodeCount)
- for i := range ids {
- conf := adapters.RandomNodeConfig()
- node, err := network.NewNodeWithConfig(conf)
- if err != nil {
- t.Fatalf("error creating node: %s", err)
- }
- if err := network.Start(node.ID()); err != nil {
- t.Fatalf("error starting node: %s", err)
- }
- ids[i] = node.ID()
- }
- if len(network.Conns) > 0 {
- t.Fatal("no connections should exist after just adding nodes")
- }
- return network, ids
- }
- func TestConnectToLastNode(t *testing.T) {
- net, ids := newTestNetwork(t, 10)
- defer net.Shutdown()
- first := ids[0]
- if err := net.ConnectToLastNode(first); err != nil {
- t.Fatal(err)
- }
- last := ids[len(ids)-1]
- for i, id := range ids {
- if id == first || id == last {
- continue
- }
- if net.GetConn(first, id) != nil {
- t.Errorf("connection must not exist with node(ind: %v, id: %v)", i, id)
- }
- }
- if net.GetConn(first, last) == nil {
- t.Error("first and last node must be connected")
- }
- }
- func TestConnectToRandomNode(t *testing.T) {
- net, ids := newTestNetwork(t, 10)
- defer net.Shutdown()
- err := net.ConnectToRandomNode(ids[0])
- if err != nil {
- t.Fatal(err)
- }
- var cc int
- for i, a := range ids {
- for _, b := range ids[i:] {
- if net.GetConn(a, b) != nil {
- cc++
- }
- }
- }
- if cc != 1 {
- t.Errorf("expected one connection, got %v", cc)
- }
- }
- func TestConnectNodesFull(t *testing.T) {
- tests := []struct {
- name string
- nodeCount int
- }{
- {name: "no node", nodeCount: 0},
- {name: "single node", nodeCount: 1},
- {name: "2 nodes", nodeCount: 2},
- {name: "3 nodes", nodeCount: 3},
- {name: "even number of nodes", nodeCount: 12},
- {name: "odd number of nodes", nodeCount: 13},
- }
- for _, test := range tests {
- t.Run(test.name, func(t *testing.T) {
- net, ids := newTestNetwork(t, test.nodeCount)
- defer net.Shutdown()
- err := net.ConnectNodesFull(ids)
- if err != nil {
- t.Fatal(err)
- }
- VerifyFull(t, net, ids)
- })
- }
- }
- func TestConnectNodesChain(t *testing.T) {
- net, ids := newTestNetwork(t, 10)
- defer net.Shutdown()
- err := net.ConnectNodesChain(ids)
- if err != nil {
- t.Fatal(err)
- }
- VerifyChain(t, net, ids)
- }
- func TestConnectNodesRing(t *testing.T) {
- net, ids := newTestNetwork(t, 10)
- defer net.Shutdown()
- err := net.ConnectNodesRing(ids)
- if err != nil {
- t.Fatal(err)
- }
- VerifyRing(t, net, ids)
- }
- func TestConnectNodesStar(t *testing.T) {
- net, ids := newTestNetwork(t, 10)
- defer net.Shutdown()
- pivotIndex := 2
- err := net.ConnectNodesStar(ids, ids[pivotIndex])
- if err != nil {
- t.Fatal(err)
- }
- VerifyStar(t, net, ids, pivotIndex)
- }
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