Modification of SUB_MEDIA_MEDIALIBRARY_ASSET_NETWORKID_PROMISE_006

Signed-off-by: Nsunshenshen <sunshenshen@huawei.com>

multimedia/medialibrary/mediaLibrary_mediafetchoptions/entry/src/main/ets/test/mediafetchoptionsPromise.test.ets

 /*
- * Copyright (C) 2022 Huawei Device Co., Ltd.
+ * Copyright (C) 2022-2023 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -187,11 +187,12 @@ export default function mediafetchoptionsPromise(abilityContext) {
                 };
                 try {
                     const fetchFileResult = await media.getFileAssets(currentFetchOps);
-                    expect(false).assertTrue();
+                    let count = await fetchFileResult.getCount();
+                    expect(count == 0).assertTrue();
                     fetchFileResult.close();
                     done();
                 } catch (err) {
-                    expect(true).assertTrue();
+                    expect(false).assertTrue();
                     done();
                 }
             } catch (error) {