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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.Services{
"noopwoop": func(ctx *adapters.ServiceContext) (node.Service, 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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