修改distributeddatamgr子系统[preferences]模块的代码

Signed-off-by: Nhu0475 <huyanqiang5@huawei.com>

distributeddatamgr/crossplatform/preferencesetstest/src/main/ets/test/PreferencesHelper.test.ets

@@ -255,7 +255,7 @@ export default function preferencesHelperTest() {
         mPreferences.on("change");
       } catch (err) {
         console.info("Failed to testPreferencesOn002. code =" + err.code + ", message =" + err.message);
-        expect(err.code === "401" && err.message === "Parameter error. Need 2 parameters!").assertTrue();
+        expect(err.code === "401").assertTrue();
       }
     });
 
@@ -277,7 +277,7 @@ export default function preferencesHelperTest() {
         mPreferences.on(null, observer);
       } catch (err) {
         console.info("Failed to testPreferencesOn003. code =" + err.code + ", message =" + err.message);
-        expect(err.code === "401" && err.message === "Parameter error. The type of 'type' must be string 'change'.").assertTrue();
+        expect(err.code === "401").assertTrue();
       }
     });
 
@@ -299,7 +299,7 @@ export default function preferencesHelperTest() {
         mPreferences.on("", observer);
       } catch (err) {
         console.info("Failed to testPreferencesOn004. code =" + err.code + ", message =" + err.message);
-        expect(err.code === "401" && err.message === "Parameter error. The type of 'type' must be string 'change'.").assertTrue();
+        expect(err.code === "401").assertTrue();
       }
     });
 
@@ -379,7 +379,7 @@ export default function preferencesHelperTest() {
         mPreferences.off(null);
       } catch (err) {
         console.info("Failed to testPreferencesOff003. code =" + err.code + ", message =" + err.message);
-        expect(err.code === "401" && err.message === "Parameter error. The type of 'type' must be string 'change'.").assertTrue();
+        expect(err.code === "401").assertTrue();
       }
     });
 
@@ -403,7 +403,7 @@ export default function preferencesHelperTest() {
         mPreferences.off("");
       } catch (err) {
         console.info("Failed to testPreferencesOff004. code =" + err.code + ", message =" + err.message);
-        expect(err.code === "401" && err.message === "Parameter error. The type of 'type' must be string 'change'.").assertTrue();
+        expect(err.code === "401").assertTrue();
       }
     });
   });