add rest of first test

test/services/NotificationServiceTests.test.ts

@@ -252,11 +252,10 @@ describe("NotificationService", () => {
       await notificationService.scheduleNotification(notificationData2);
 
       // Act
+      const notifications = await notificationService.getAllScheduledNotificationsForDevice(notificationData1.deviceId);
 
       // Assert
-
-
-
+      expect(notifications.length).toBe(2);
     });
 
     it("returns an empty array if there are no notifications", async () => {