fixed 3fca411a from https://gitee.com/nan-xiansen/xts_acts/pulls/8373

【resourceschedule】优化长时任务模块用例稳定性问题
Signed-off-by: Nnan-xiansen <nanjinbin@huawei.com>
Change-Id: I10d98f6d7b465646b7697453f89db2f1843f85cf

resourceschedule/resourceschedule_standard/backgroundtaskmanager/src/main/js/test/ContinuousTaskJsunit.test.js

@@ -20,6 +20,7 @@ import commonEvent from '@ohos.commonEvent';
 import {describe, beforeAll, beforeEach, afterEach, afterAll, it, expect} from '@ohos/hypium';
 
 const TAG = "ContinuousTaskJsTest ";
+let subscribe_;
 
 export default function ContinuousTaskJsTest() {
 describe("ContinuousTaskJsTest", function () {
@@ -59,7 +60,8 @@ describe("ContinuousTaskJsTest", function () {
         commonEvent.createSubscriber(subscribeInfo, (err, subscriber) => {
             if (subscriber !== null && subscriber !== undefined) {
                 console.info(TAG + "Subscribe begin");
-                commonEvent.subscribe(subscriber, (err, data) => {
+                subscribe_ = subscriber;
+                commonEvent.subscribe(subscribe_, (err, data) => {
                     if (data !== null && data !== undefined) {
                         console.info(TAG + "Get comment event: " + JSON.stringify(data));
                         if (data.event === event) {