[ACA-3269]Move notificationPage to adf testing package (#5687)

* Move notificationPage to adf testing package

* Fix lint

* Fix test

* Fix test

* Wait for snackbar to be closed in the tests

* Fix notification tests

lib/testing/src/lib/core/pages/public-api.ts

@@ -30,3 +30,4 @@ export * from './card-view/public-api';
 export * from './viewer.page';
 export * from './config-editor-page';
 export * from './about.page';
+export * from './snackbar.page';

lib/testing/src/lib/core/pages/snackbar.page.ts

@@ -0,0 +1,51 @@
+/*!
+ * @license
+ * Copyright 2019 Alfresco Software, 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
+ *
+ *     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.
+ */
+
+import { element, by, ElementFinder } from 'protractor';
+import { BrowserVisibility } from '../utils/browser-visibility';
+import { Logger } from '../utils/logger';
+
+export class SnackbarPage {
+
+    notificationSnackBar: ElementFinder = element(by.css('simple-snack-bar span'));
+    snackBarContainerCss = by.css('.mat-snack-bar-container');
+
+    async waitForSnackBarToAppear() {
+        return BrowserVisibility.waitUntilElementIsVisible(element(this.snackBarContainerCss), 20000,
+            'snackbar did not appear'
+        );
+    }
+
+    async waitForSnackBarToClose() {
+        return BrowserVisibility.waitUntilElementIsNotVisible(element(this.snackBarContainerCss), 20000);
+    }
+
+    async getSnackBarMessage(): Promise<string> {
+        await this.waitForSnackBarToAppear();
+        return this.notificationSnackBar.getText();
+    }
+
+    async isNotificationSnackBarDisplayed(): Promise<boolean> {
+        try {
+            await BrowserVisibility.waitUntilElementIsVisible(this.notificationSnackBar);
+            return true;
+        } catch {
+            Logger.error(`Snackbar is not displayed `);
+            return false;
+        }
+    }
+}