test(common): 重构 Test_event 测试函数

- 重写了 Test_event 测试函数，移除了未使用的测试代码
- 新增了基于 Task 结构的事件处理逻辑
- 实现了任务计数和完成状态的更新
- 添加了事件发布和订阅的示例代码

common/utils/sqrt_test.go

@@ -92,56 +92,50 @@ func BenchmarkFastSqrtInt(b *testing.B) {
 	}
 }
 
-func Test_fastSqr1(b *testing.T) {
-	// scenario : we have a large number of subscribers.
-	// we publish an event and while doing that,
-	// we register another one on a different goroutine
+func Test_event(b *testing.T) {
 
-	topic := bus.NewTopic[*Uint32AsyncEvent]()
-	for i := 0; i < 4096; i++ {
-		topic.Sub(func(v *Uint32AsyncEvent) {
-			print(v.u)
+	tt := make(map[int]*bus.Listener[*Task], 3)
+	topic := bus.NewTopic[*Task]() //直接注册到用户
+	for i := 0; i < 1; i++ {
+		t := topic.Sub(func(v *Task) { //注册里程碑
+			fmt.Println(v.id)
+			if v.cfunc != nil {
+				v.cont = v.cfunc(v.cont) //增加计数
+			}
+
+			if v.cont > 0 { //如果计数达到,标记任务完成
+				v.done = true
+			}
+			fmt.Println("当前任务计数", v.cont, "是否完成", v.done)
 		})
+		tt[i] = t
 	}
+	topic.Pub(&Task{id: 1, cfunc: func(t uint32) uint32 { //满足任务1后推定
 
-	topic.Pub(&Uint32AsyncEvent{u: 1})
-	// finishPubWait := make(chan struct{})
-	// finishSubWait := make(chan struct{})
-	// start := make(chan struct{})
+		fmt.Println("当前任务计数", t)
+		//实现自定义逻辑
+		//增加用户计数
+		//增加服务器总计数
+		return t + 1
 
-	// go func() {
-	// 	<-start
-	// 	topic.PubAsync(&Uint32AsyncEvent{u: 1})
-	// 	defer close(finishPubWait)
-	// }()
+	}})
+	topic.Pub(&Task{id: 2, done: true})
+	for _, v := range tt {
 
-	// newSubCalled := false
-
-	// go func() {
-	// 	<-start
-	// 	topic.Sub(func(v *Uint32AsyncEvent) {
-	// 		newSubCalled = true
-	// 	})
-	// 	close(finishSubWait)
-	// }()
-
-	// close(start) // start both goroutines
-
-	// <-finishPubWait // wait for pub to finish
-
-	// <-finishSubWait // wait for sub to finish
-
-	// if newSubCalled {
-	// 	print("new subscriber called")
-	// }
+		v.Cancel()
+	}
+	topic.Pub(&Task{id: 1}) //发送事件
 
 }
 
 // Various event types
 const EventA = 0x01
 
-type Uint32AsyncEvent struct {
-	u uint32
+type Task struct {
+	id    uint32
+	cfunc func(uint32) uint32
+	cont  uint32
+	done  bool
 }
 
 // Event type for testing purposes