// Copyright 2015 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 node
import (
"errors"
"io/ioutil"
"os"
"reflect"
"testing"
"time"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/rpc"
)
var (
testNodeKey, _ = crypto.GenerateKey()
)
func testNodeConfig() *Config {
return &Config{
PrivateKey: testNodeKey,
Name: "test node",
}
}
// Tests that an empty protocol stack can be started, restarted and stopped.
func TestNodeLifeCycle(t *testing.T) {
stack, err := New(testNodeConfig())
if err != nil {
t.Fatalf("failed to create protocol stack: %v", err)
}
// Ensure that a stopped node can be stopped again
for i := 0; i < 3; i++ {
if err := stack.Stop(); err != ErrNodeStopped {
t.Fatalf("iter %d: stop failure mismatch: have %v, want %v", i, err, ErrNodeStopped)
}
}
// Ensure that a node can be successfully started, but only once
if err := stack.Start(); err != nil {
t.Fatalf("failed to start node: %v", err)
}
if err := stack.Start(); err != ErrNodeRunning {
t.Fatalf("start failure mismatch: have %v, want %v ", err, ErrNodeRunning)
}
// Ensure that a node can be restarted arbitrarily many times
for i := 0; i < 3; i++ {
if err := stack.Restart(); err != nil {
t.Fatalf("iter %d: failed to restart node: %v", i, err)
}
}
// Ensure that a node can be stopped, but only once
if err := stack.Stop(); err != nil {
t.Fatalf("failed to stop node: %v", err)
}
if err := stack.Stop(); err != ErrNodeStopped {
t.Fatalf("stop failure mismatch: have %v, want %v ", err, ErrNodeStopped)
}
}
// Tests that if the data dir is already in use, an appropriate error is returned.
func TestNodeUsedDataDir(t *testing.T) {
// Create a temporary folder to use as the data directory
dir, err := ioutil.TempDir("", "")
if err != nil {
t.Fatalf("failed to create temporary data directory: %v", err)
}
defer os.RemoveAll(dir)
// Create a new node based on the data directory
original, err := New(&Config{DataDir: dir})
if err != nil {
t.Fatalf("failed to create original protocol stack: %v", err)
}
if err := original.Start(); err != nil {
t.Fatalf("failed to start original protocol stack: %v", err)
}
defer original.Stop()
// Create a second node based on the same data directory and ensure failure
duplicate, err := New(&Config{DataDir: dir})
if err != nil {
t.Fatalf("failed to create duplicate protocol stack: %v", err)
}
if err := duplicate.Start(); err != ErrDatadirUsed {
t.Fatalf("duplicate datadir failure mismatch: have %v, want %v", err, ErrDatadirUsed)
}
}
// Tests whether services can be registered and duplicates caught.
func TestServiceRegistry(t *testing.T) {
stack, err := New(testNodeConfig())
if err != nil {
t.Fatalf("failed to create protocol stack: %v", err)
}
// Register a batch of unique services and ensure they start successfully
services := []ServiceConstructor{NewNoopServiceA, NewNoopServiceB, NewNoopServiceC}
for i, constructor := range services {
if err := stack.Register(constructor); err != nil {
t.Fatalf("service #%d: registration failed: %v", i, err)
}
}
if err := stack.Start(); err != nil {
t.Fatalf("failed to start original service stack: %v", err)
}
if err := stack.Stop(); err != nil {
t.Fatalf("failed to stop original service stack: %v", err)
}
// Duplicate one of the services and retry starting the node
if err := stack.Register(NewNoopServiceB); err != nil {
t.Fatalf("duplicate registration failed: %v", err)
}
if err := stack.Start(); err == nil {
t.Fatalf("duplicate service started")
} else {
if _, ok := err.(*DuplicateServiceError); !ok {
t.Fatalf("duplicate error mismatch: have %v, want %v", err, DuplicateServiceError{})
}
}
}
// Tests that registered services get started and stopped correctly.
func TestServiceLifeCycle(t *testing.T) {
stack, err := New(testNodeConfig())
if err != nil {
t.Fatalf("failed to create protocol stack: %v", err)
}
// Register a batch of life-cycle instrumented services
services := map[string]InstrumentingWrapper{
"A": InstrumentedServiceMakerA,
"B": InstrumentedServiceMakerB,
"C": InstrumentedServiceMakerC,
}
started := make(map[string]bool)
stopped := make(map[string]bool)
for id, maker := range services {
id := id // Closure for the constructor
constructor := func(*ServiceContext) (Service, error) {
return &InstrumentedService{
startHook: func(*p2p.Server) { started[id] = true },
stopHook: func() { stopped[id] = true },
}, nil
}
if err := stack.Register(maker(constructor)); err != nil {
t.Fatalf("service %s: registration failed: %v", id, err)
}
}
// Start the node and check that all services are running
if err := stack.Start(); err != nil {
t.Fatalf("failed to start protocol stack: %v", err)
}
for id := range services {
if !started[id] {
t.Fatalf("service %s: freshly started service not running", id)
}
if stopped[id] {
t.Fatalf("service %s: freshly started service already stopped", id)
}
}
// Stop the node and check that all services have been stopped
if err := stack.Stop(); err != nil {
t.Fatalf("failed to stop protocol stack: %v", err)
}
for id := range services {
if !stopped[id] {
t.Fatalf("service %s: freshly terminated service still running", id)
}
}
}
// Tests that services are restarted cleanly as new instances.
func TestServiceRestarts(t *testing.T) {
stack, err := New(testNodeConfig())
if err != nil {
t.Fatalf("failed to create protocol stack: %v", err)
}
// Define a service that does not support restarts
var (
running bool
started int
)
constructor := func(*ServiceContext) (Service, error) {
running = false
return &InstrumentedService{
startHook: func(*p2p.Server) {
if running {
panic("already running")
}
running = true
started++
},
}, nil
}
// Register the service and start the protocol stack
if err := stack.Register(constructor); err != nil {
t.Fatalf("failed to register the service: %v", err)
}
if err := stack.Start(); err != nil {
t.Fatalf("failed to start protocol stack: %v", err)
}
defer stack.Stop()
if !running || started != 1 {
t.Fatalf("running/started mismatch: have %v/%d, want true/1", running, started)
}
// Restart the stack a few times and check successful service restarts
for i := 0; i < 3; i++ {
if err := stack.Restart(); err != nil {
t.Fatalf("iter %d: failed to restart stack: %v", i, err)
}
}
if !running || started != 4 {
t.Fatalf("running/started mismatch: have %v/%d, want true/4", running, started)
}
}
// Tests that if a service fails to initialize itself, none of the other services
// will be allowed to even start.
func TestServiceConstructionAbortion(t *testing.T) {
stack, err := New(testNodeConfig())
if err != nil {
t.Fatalf("failed to create protocol stack: %v", err)
}
// Define a batch of good services
services := map[string]InstrumentingWrapper{
"A": InstrumentedServiceMakerA,
"B": InstrumentedServiceMakerB,
"C": InstrumentedServiceMakerC,
}
started := make(map[string]bool)
for id, maker := range services {
id := id // Closure for the constructor
constructor := func(*ServiceContext) (Service, error) {
return &InstrumentedService{
startHook: func(*p2p.Server) { started[id] = true },
}, nil
}
if err := stack.Register(maker(constructor)); err != nil {
t.Fatalf("service %s: registration failed: %v", id, err)
}
}
// Register a service that fails to construct itself
failure := errors.New("fail")
failer := func(*ServiceContext) (Service, error) {
return nil, failure
}
if err := stack.Register(failer); err != nil {
t.Fatalf("failer registration failed: %v", err)
}
// Start the protocol stack and ensure none of the services get started
for i := 0; i < 100; i++ {
if err := stack.Start(); err != failure {
t.Fatalf("iter %d: stack startup failure mismatch: have %v, want %v", i, err, failure)
}
for id := range services {
if started[id] {
t.Fatalf("service %s: started should not have", id)
}
delete(started, id)
}
}
}
// Tests that if a service fails to start, all others started before it will be
// shut down.
func TestServiceStartupAbortion(t *testing.T) {
stack, err := New(testNodeConfig())
if err != nil {
t.Fatalf("failed to create protocol stack: %v", err)
}
// Register a batch of good services
services := map[string]InstrumentingWrapper{
"A": InstrumentedServiceMakerA,
"B": InstrumentedServiceMakerB,
"C": InstrumentedServiceMakerC,
}
started := make(map[string]bool)
stopped := make(map[string]bool)
for id, maker := range services {
id := id // Closure for the constructor
constructor := func(*ServiceContext) (Service, error) {
return &InstrumentedService{
startHook: func(*p2p.Server) { started[id] = true },
stopHook: func() { stopped[id] = true },
}, nil
}
if err := stack.Register(maker(constructor)); err != nil {
t.Fatalf("service %s: registration failed: %v", id, err)
}
}
// Register a service that fails to start
failure := errors.New("fail")
failer := func(*ServiceContext) (Service, error) {
return &InstrumentedService{
start: failure,
}, nil
}
if err := stack.Register(failer); err != nil {
t.Fatalf("failer registration failed: %v", err)
}
// Start the protocol stack and ensure all started services stop
for i := 0; i < 100; i++ {
if err := stack.Start(); err != failure {
t.Fatalf("iter %d: stack startup failure mismatch: have %v, want %v", i, err, failure)
}
for id := range services {
if started[id] && !stopped[id] {
t.Fatalf("service %s: started but not stopped", id)
}
delete(started, id)
delete(stopped, id)
}
}
}
// Tests that even if a registered service fails to shut down cleanly, it does
// not influece the rest of the shutdown invocations.
func TestServiceTerminationGuarantee(t *testing.T) {
stack, err := New(testNodeConfig())
if err != nil {
t.Fatalf("failed to create protocol stack: %v", err)
}
// Register a batch of good services
services := map[string]InstrumentingWrapper{
"A": InstrumentedServiceMakerA,
"B": InstrumentedServiceMakerB,
"C": InstrumentedServiceMakerC,
}
started := make(map[string]bool)
stopped := make(map[string]bool)
for id, maker := range services {
id := id // Closure for the constructor
constructor := func(*ServiceContext) (Service, error) {
return &InstrumentedService{
startHook: func(*p2p.Server) { started[id] = true },
stopHook: func() { stopped[id] = true },
}, nil
}
if err := stack.Register(maker(constructor)); err != nil {
t.Fatalf("service %s: registration failed: %v", id, err)
}
}
// Register a service that fails to shot down cleanly
failure := errors.New("fail")
failer := func(*ServiceContext) (Service, error) {
return &InstrumentedService{
stop: failure,
}, nil
}
if err := stack.Register(failer); err != nil {
t.Fatalf("failer registration failed: %v", err)
}
// Start the protocol stack, and ensure that a failing shut down terminates all
for i := 0; i < 100; i++ {
// Start the stack and make sure all is online
if err := stack.Start(); err != nil {
t.Fatalf("iter %d: failed to start protocol stack: %v", i, err)
}
for id := range services {
if !started[id] {
t.Fatalf("iter %d, service %s: service not running", i, id)
}
if stopped[id] {
t.Fatalf("iter %d, service %s: service already stopped", i, id)
}
}
// Stop the stack, verify failure and check all terminations
err := stack.Stop()
if err, ok := err.(*StopError); !ok {
t.Fatalf("iter %d: termination failure mismatch: have %v, want StopError", i, err)
} else {
failer := reflect.TypeOf(&InstrumentedService{})
if err.Services[failer] != failure {
t.Fatalf("iter %d: failer termination failure mismatch: have %v, want %v", i, err.Services[failer], failure)
}
if len(err.Services) != 1 {
t.Fatalf("iter %d: failure count mismatch: have %d, want %d", i, len(err.Services), 1)
}
}
for id := range services {
if !stopped[id] {
t.Fatalf("iter %d, service %s: service not terminated", i, id)
}
delete(started, id)
delete(stopped, id)
}
}
}
// TestServiceRetrieval tests that individual services can be retrieved.
func TestServiceRetrieval(t *testing.T) {
// Create a simple stack and register two service types
stack, err := New(testNodeConfig())
if err != nil {
t.Fatalf("failed to create protocol stack: %v", err)
}
if err := stack.Register(NewNoopService); err != nil {
t.Fatalf("noop service registration failed: %v", err)
}
if err := stack.Register(NewInstrumentedService); err != nil {
t.Fatalf("instrumented service registration failed: %v", err)
}
// Make sure none of the services can be retrieved until started
var noopServ *NoopService
if err := stack.Service(&noopServ); err != ErrNodeStopped {
t.Fatalf("noop service retrieval mismatch: have %v, want %v", err, ErrNodeStopped)
}
var instServ *InstrumentedService
if err := stack.Service(&instServ); err != ErrNodeStopped {
t.Fatalf("instrumented service retrieval mismatch: have %v, want %v", err, ErrNodeStopped)
}
// Start the stack and ensure everything is retrievable now
if err := stack.Start(); err != nil {
t.Fatalf("failed to start stack: %v", err)
}
defer stack.Stop()
if err := stack.Service(&noopServ); err != nil {
t.Fatalf("noop service retrieval mismatch: have %v, want %v", err, nil)
}
if err := stack.Service(&instServ); err != nil {
t.Fatalf("instrumented service retrieval mismatch: have %v, want %v", err, nil)
}
}
// Tests that all protocols defined by individual services get launched.
func TestProtocolGather(t *testing.T) {
stack, err := New(testNodeConfig())
if err != nil {
t.Fatalf("failed to create protocol stack: %v", err)
}
// Register a batch of services with some configured number of protocols
services := map[string]struct {
Count int
Maker InstrumentingWrapper
}{
"Zero Protocols": {0, InstrumentedServiceMakerA},
"Single Protocol": {1, InstrumentedServiceMakerB},
"Many Protocols": {25, InstrumentedServiceMakerC},
}
for id, config := range services {
protocols := make([]p2p.Protocol, config.Count)
for i := 0; i < len(protocols); i++ {
protocols[i].Name = id
protocols[i].Version = uint(i)
}
constructor := func(*ServiceContext) (Service, error) {
return &InstrumentedService{
protocols: protocols,
}, nil
}
if err := stack.Register(config.Maker(constructor)); err != nil {
t.Fatalf("service %s: registration failed: %v", id, err)
}
}
// Start the services and ensure all protocols start successfully
if err := stack.Start(); err != nil {
t.Fatalf("failed to start protocol stack: %v", err)
}
defer stack.Stop()
protocols := stack.Server().Protocols
if len(protocols) != 26 {
t.Fatalf("mismatching number of protocols launched: have %d, want %d", len(protocols), 26)
}
for id, config := range services {
for ver := 0; ver < config.Count; ver++ {
launched := false
for i := 0; i < len(protocols); i++ {
if protocols[i].Name == id && protocols[i].Version == uint(ver) {
launched = true
break
}
}
if !launched {
t.Errorf("configured protocol not launched: %s v%d", id, ver)
}
}
}
}
// Tests that all APIs defined by individual services get exposed.
func TestAPIGather(t *testing.T) {
stack, err := New(testNodeConfig())
if err != nil {
t.Fatalf("failed to create protocol stack: %v", err)
}
// Register a batch of services with some configured APIs
calls := make(chan string, 1)
makeAPI := func(result string) *OneMethodApi {
return &OneMethodApi{fun: func() { calls <- result }}
}
services := map[string]struct {
APIs []rpc.API
Maker InstrumentingWrapper
}{
"Zero APIs": {
[]rpc.API{}, InstrumentedServiceMakerA},
"Single API": {
[]rpc.API{
{Namespace: "single", Version: "1", Service: makeAPI("single.v1"), Public: true},
}, InstrumentedServiceMakerB},
"Many APIs": {
[]rpc.API{
{Namespace: "multi", Version: "1", Service: makeAPI("multi.v1"), Public: true},
{Namespace: "multi.v2", Version: "2", Service: makeAPI("multi.v2"), Public: true},
{Namespace: "multi.v2.nested", Version: "2", Service: makeAPI("multi.v2.nested"), Public: true},
}, InstrumentedServiceMakerC},
}
for id, config := range services {
config := config
constructor := func(*ServiceContext) (Service, error) {
return &InstrumentedService{apis: config.APIs}, nil
}
if err := stack.Register(config.Maker(constructor)); err != nil {
t.Fatalf("service %s: registration failed: %v", id, err)
}
}
// Start the services and ensure all API start successfully
if err := stack.Start(); err != nil {
t.Fatalf("failed to start protocol stack: %v", err)
}
defer stack.Stop()
// Connect to the RPC server and verify the various registered endpoints
client, err := stack.Attach()
if err != nil {
t.Fatalf("failed to connect to the inproc API server: %v", err)
}
defer client.Close()
tests := []struct {
Method string
Result string
}{
{"single_theOneMethod", "single.v1"},
{"multi_theOneMethod", "multi.v1"},
{"multi.v2_theOneMethod", "multi.v2"},
{"multi.v2.nested_theOneMethod", "multi.v2.nested"},
}
for i, test := range tests {
if err := client.Call(nil, test.Method); err != nil {
t.Errorf("test %d: API request failed: %v", i, err)
}
select {
case result := <-calls:
if result != test.Result {
t.Errorf("test %d: result mismatch: have %s, want %s", i, result, test.Result)
}
case <-time.After(time.Second):
t.Fatalf("test %d: rpc execution timeout", i)
}
}
}
