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// Copyright 2013, Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package sync2
import (
"fmt"
"testing"
"time"
)
type testService struct {
activated AtomicInt64
t *testing.T
}
func (ts *testService) service(svc *ServiceContext) error {
if !ts.activated.CompareAndSwap(0, 1) {
ts.t.Fatalf("service called more than once")
}
for svc.IsRunning() {
time.Sleep(10 * time.Millisecond)
}
if !ts.activated.CompareAndSwap(1, 0) {
ts.t.Fatalf("service ended more than once")
}
return nil
}
func (ts *testService) selectService(svc *ServiceContext) error {
if !ts.activated.CompareAndSwap(0, 1) {
ts.t.Fatalf("service called more than once")
}
serviceLoop:
for svc.IsRunning() {
select {
case <-time.After(1 * time.Second):
ts.t.Errorf("service didn't stop when shutdown channel was closed")
case <-svc.ShuttingDown:
break serviceLoop
}
}
if !ts.activated.CompareAndSwap(1, 0) {
ts.t.Fatalf("service ended more than once")
}
return nil
}
func TestServiceManager(t *testing.T) {
ts := &testService{t: t}
var sm ServiceManager
if sm.StateName() != "Stopped" {
t.Errorf("want Stopped, got %s", sm.StateName())
}
result := sm.Go(ts.service)
if !result {
t.Errorf("want true, got false")
}
if sm.StateName() != "Running" {
t.Errorf("want Running, got %s", sm.StateName())
}
time.Sleep(5 * time.Millisecond)
if val := ts.activated.Get(); val != 1 {
t.Errorf("want 1, got %d", val)
}
result = sm.Go(ts.service)
if result {
t.Errorf("want false, got true")
}
result = sm.Stop()
if !result {
t.Errorf("want true, got false")
}
if val := ts.activated.Get(); val != 0 {
t.Errorf("want 0, got %d", val)
}
result = sm.Stop()
if result {
t.Errorf("want false, got true")
}
sm.state.Set(SERVICE_SHUTTING_DOWN)
if sm.StateName() != "ShuttingDown" {
t.Errorf("want ShuttingDown, got %s", sm.StateName())
}
}
func TestServiceManagerSelect(t *testing.T) {
ts := &testService{t: t}
var sm ServiceManager
if sm.StateName() != "Stopped" {
t.Errorf("want Stopped, got %s", sm.StateName())
}
result := sm.Go(ts.selectService)
if !result {
t.Errorf("want true, got false")
}
if sm.StateName() != "Running" {
t.Errorf("want Running, got %s", sm.StateName())
}
time.Sleep(5 * time.Millisecond)
if val := ts.activated.Get(); val != 1 {
t.Errorf("want 1, got %d", val)
}
result = sm.Go(ts.service)
if result {
t.Errorf("want false, got true")
}
result = sm.Stop()
if !result {
t.Errorf("want true, got false")
}
if val := ts.activated.Get(); val != 0 {
t.Errorf("want 0, got %d", val)
}
result = sm.Stop()
if result {
t.Errorf("want false, got true")
}
sm.state.Set(SERVICE_SHUTTING_DOWN)
if sm.StateName() != "ShuttingDown" {
t.Errorf("want ShuttingDown, got %s", sm.StateName())
}
}
func TestServiceManagerWaitNotRunning(t *testing.T) {
done := make(chan struct{})
var sm ServiceManager
go func() {
sm.Wait()
close(done)
}()
select {
case <-done:
case <-time.After(1 * time.Second):
t.Errorf("Wait() blocked even though service wasn't running.")
}
}
func TestServiceManagerWait(t *testing.T) {
done := make(chan struct{})
stop := make(chan struct{})
var sm ServiceManager
sm.Go(func(*ServiceContext) error {
<-stop
return nil
})
go func() {
sm.Wait()
close(done)
}()
time.Sleep(100 * time.Millisecond)
select {
case <-done:
t.Errorf("Wait() didn't block while service was still running.")
default:
}
close(stop)
select {
case <-done:
case <-time.After(100 * time.Millisecond):
t.Errorf("Wait() didn't unblock when service stopped.")
}
}
func TestServiceManagerJoin(t *testing.T) {
want := "error 123"
var sm ServiceManager
sm.Go(func(*ServiceContext) error {
return fmt.Errorf("error 123")
})
if got := sm.Join().Error(); got != want {
t.Errorf("Join().Error() = %#v, want %#v", got, want)
}
}
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