@PostMapping(path = "/test")
    public ShenyuAdminResult sendTestMsg(@Valid @RequestBody final AlertReceiverDTO alertReceiverDTO) {
        try {
            boolean sendFlag = alertReceiverService.sendTestMsg(alertReceiverDTO);
            if (sendFlag) {
                return ShenyuAdminResult.success();
            } else {
                return ShenyuAdminResult.error("Notify service not available, please check config!");
            }
        } catch (Exception e) {
            return ShenyuAdminResult.error("Notify service error: " + e.getMessage());
        }
    }
send test message to receiver.
@param alertReceiverDTO receiver
@return send result
shenyu-admin/src/main/java/org/apache/shenyu/admin/controller/AlertReceiverController.java