[HappyPath] Make checking running application more stable

e2e/package.json

@@ -26,7 +26,8 @@
     "ts-node": "^8.0.3",
     "tslint": "5.10.0",
     "typed-rest-client": "^1.2.0",
-    "typescript": "^3.4.3"
+    "typescript": "^3.4.3",
+    "axios": "0.17.1"
   },
   "dependencies": {
     "inversify": "^5.0.1",

e2e/pageobjects/ide/Ide.ts

@@ -7,6 +7,7 @@
  *
  * SPDX-License-Identifier: EPL-2.0
  **********************************************************************/
+import axios from 'axios';
 import { DriverHelper } from '../../utils/DriverHelper';
 import { injectable, inject } from 'inversify';
 import { CLASSES } from '../../inversify.types';
@@ -74,6 +75,7 @@ export class Ide {
     }
 
     async waitNotificationAndOpenLink(notificationText: string, timeout: number = TestConstants.TS_SELENIUM_DEFAULT_TIMEOUT) {
+        await this.waitApplicationReadyToUse(await this.getApplicationUrl(notificationText));
         await this.waitNotificationAndClickOnButton(notificationText, 'Open Link', timeout);
     }
 
@@ -229,6 +231,38 @@ export class Ide {
         await this.driverHelper.waitVisibility(selectedRightToolbarButtonLocator, timeout);
     }
 
+    async getApplicationUrl(notificationText: string) {
+        const notificationTextLocator: By = By.xpath(`//div[@class='theia-Notification']//p[contains(@id,'${notificationText}')]`);
+
+        let notification = await this.driverHelper.waitAndGetText(notificationTextLocator);
+        let regexp: RegExp = new RegExp('^.*(https?://.*)$');
+
+        if (!regexp.test(notification)) {
+            throw new Error('Cannot obtaine url from notification message');
+        }
+
+        return notification.split(regexp)[1];
+    }
+
+    async waitApplicationReadyToUse(url: string,
+        timeout: number = TestConstants.TS_SELENIUM_DEFAULT_TIMEOUT) {
+
+         await this.driverHelper.getDriver().wait(async () => {
+            try {
+                let res = await axios.get(url);
+
+                if (res.status === 200) {
+                    console.log('Application is ready for use.');
+                    return true;
+                }
+            } catch (error) {
+               console.log('Application is not yet ready for use');
+            }
+
+            await this.driverHelper.wait(TestConstants.TS_SELENIUM_DEFAULT_POLLING);
+        }, timeout);
+    }
+
     private getSelectedRightToolbarButtonLocator(buttonTitle: string): By {
         return By.xpath(`//div[@id='theia-left-content-panel']//ul[@class='p-TabBar-content']` +
             `//li[@title='${buttonTitle}' and contains(@id, 'shell-tab')] and contains(@class, 'p-mod-current')`);