fix: fix test and add another gr to push notify

cluster/router/chain/chain.go

@@ -104,7 +104,9 @@ func (c *RouterChain) AddRouters(routers []router.PriorityRouter) {
 	c.mutex.Lock()
 	defer c.mutex.Unlock()
 	c.routers = newRouters
-	c.notify <- struct{}{}
+	go func() {
+		c.notify <- struct{}{}
+	}()
 }
 
 // SetInvokers receives updated invokers from registry center. If the times of notification exceeds countThreshold and

cluster/router/chain/chain_test.go

@@ -143,6 +143,11 @@ conditions:
 	assert.NotNil(t, url)
 	factory := extension.GetRouterFactory(url.Protocol)
 	notify := make(chan struct{})
+	go func() {
+		for {
+			<-notify
+		}
+	}()
 	r, err := factory.NewPriorityRouter(url, notify)
 	assert.Nil(t, err)
 	assert.NotNil(t, r)