[ADF-3118] translation support for notification service (snackbars) (#3427)

* translation support for snackbar

* unit tests

lib/core/services/notification.service.spec.ts

@@ -23,6 +23,8 @@ import { async, ComponentFixture, TestBed } from '@angular/core/testing';
 import { MatSnackBar, MatSnackBarModule } from '@angular/material';
 import { NoopAnimationsModule } from '@angular/platform-browser/animations';
 import { NotificationService } from './notification.service';
+import { TranslationMock } from '../mock/translation.service.mock';
+import { TranslationService } from './translation.service';
 
 @Component({
     template: '',
@@ -47,6 +49,7 @@ class ProvidesNotificationServiceComponent {
 
 describe('NotificationService', () => {
     let fixture: ComponentFixture<ProvidesNotificationServiceComponent>;
+    let translationService: TranslationService;
 
     beforeEach(async(() => {
         TestBed.configureTestingModule({
@@ -60,11 +63,12 @@ describe('NotificationService', () => {
                 NotificationService,
                 MatSnackBar,
                 OVERLAY_PROVIDERS,
-                LiveAnnouncer
+                LiveAnnouncer,
+                { provide: TranslationService, useClass: TranslationMock }
             ]
         });
 
-        TestBed.compileComponents();
+        translationService = TestBed.get(TranslationService);
     }));
 
     beforeEach(() => {
@@ -72,6 +76,18 @@ describe('NotificationService', () => {
         fixture.detectChanges();
     });
 
+    it('should translate messages', (done) => {
+        spyOn(translationService, 'instant').and.callThrough();
+
+        let promise = fixture.componentInstance.sendMessage();
+        promise.afterDismissed().subscribe(() => {
+            expect(translationService.instant).toHaveBeenCalled();
+            done();
+        });
+
+        fixture.detectChanges();
+    });
+
     it('should open a message notification bar', (done) => {
         let promise = fixture.componentInstance.sendMessage();
         promise.afterDismissed().subscribe(() => {