Added spec file for notification service.

wrote unit test case for notification service.

Issue-ID: APPC-1064
Change-Id: Ib5459ae4795b8d2b225d8953a7d707ce516b8ee3
Signed-off-by: Arundathi <arundpil@in.ibm.com>
diff --git a/src/app/shared/services/notification.service.spec.ts b/src/app/shared/services/notification.service.spec.ts
new file mode 100644
index 0000000..f552645
--- /dev/null
+++ b/src/app/shared/services/notification.service.spec.ts
@@ -0,0 +1,63 @@
+/*
+============LICENSE_START==========================================
+===================================================================
+Copyright (C) 2018 IBM Intellectual Property. All rights reserved.
+===================================================================
+
+Unless otherwise specified, all software contained herein is licensed
+under the Apache License, Version 2.0 (the License);
+you may not use this software except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+============LICENSE_END============================================
+*/
+
+import { inject, TestBed, ComponentFixture } from '@angular/core/testing';
+import { NotificationService } from './notification.service';
+import { Notification } from '../models/Notification';
+
+describe('EmitterService', () => {
+    let service;
+    beforeEach(() => {
+        TestBed.configureTestingModule({
+            providers: [NotificationService]
+        });
+    });
+
+    beforeEach(() => {
+        service = new NotificationService();
+    });
+
+    it('should be created', inject([NotificationService], (service: NotificationService) => {
+        expect(service).toBeTruthy();
+    }));
+
+    it('should test notifySuccessMessage function', () => {
+        service.notifySuccessMessage('message');
+    });
+
+    it('should test add function', () => {
+        service.add(new Notification('error', 'message'));
+    });
+
+    it('should test notifyErrorMessage function', () => {
+        service.notifyErrorMessage('message');
+    });
+
+    it('should test notifyInfoMessage function', () => {
+        service.notifyInfoMessage('message');
+    });
+
+    it('should test notifyAlertMessage function', () => {
+        service.notifyAlertMessage('message');
+    });
+
+});