feat: 补齐虚拟机验收并去掉 Docker 弱网占位

test/accept/mqtt.go

@@ -45,6 +45,19 @@ func MQTTLogin(t *testing.T, httpBase, endpointID, password string) *MQTTSession
 	return MQTTLoginWith(t, httpBase, endpointID, password, MQTTLoginOpts{})
 }
 
+// MQTTLoginTCP 用裸 TCP 连上 listen 地址，完成订阅与 hello。
+func MQTTLoginTCP(t *testing.T, addr, endpointID, password string) *MQTTSession {
+	t.Helper()
+	mc, err := harness.DialMQTTTCP(addr, 15*time.Second)
+	if err != nil {
+		t.Fatalf("dial tcp mqtt: %v", err)
+	}
+	s := &MQTTSession{t: t, mc: mc, EndpointID: endpointID, pktID: 10, done: make(chan struct{})}
+	s.connectSubscribeHello(password, MQTTLoginOpts{})
+	go s.readLoop()
+	return s
+}
+
 // MQTTLoginWith 同 MQTTLogin，可声明接收上限等。
 func MQTTLoginWith(t *testing.T, httpBase, endpointID, password string, opts MQTTLoginOpts) *MQTTSession {
 	t.Helper()