Go基础--21 多路选择和超时

select 多路复用和超时

package _select

import (
	"fmt"
	"testing"
	"time"
)

func service() string {
	time.Sleep(time.Millisecond * 500)
	return "Done"
}

func AsyncService() chan string{
	retch := make(chan string)
	go func() {
		ret := service()
		fmt.Println("return result .")
		retch<-ret
		fmt.Println("service exited")
	}()
	return retch
}

func TestService(t *testing.T){
	select {
	case ret := <-AsyncService():
		t.Log(ret)
	case <-time.After(time.Millisecond * 100):
		t.Error("time out ...")
	}
}