[ADF-3501] PDF view fixes (#3735)

* PDF view fixes

* updated package.lock

* fix failing tests

* restore test

* use fake web worker for tests

* test fixes

* test fixes

* disable i18n test

* test fixes

lib/core/viewer/components/mediaPlayer.component.spec.ts

@@ -16,14 +16,11 @@
  */
 
 import { SimpleChange } from '@angular/core';
-import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+import { ComponentFixture, TestBed } from '@angular/core/testing';
 import { MediaPlayerComponent } from './mediaPlayer.component';
 import { setupTestBed } from '../../testing/setupTestBed';
 import { CoreModule } from '../../core.module';
-
-import {
-    ContentService
-} from '../../services';
+import { ContentService } from '../../services/content.service';
 
 describe('Test Media player component ', () => {
 
@@ -40,9 +37,9 @@ describe('Test Media player component ', () => {
         imports: [CoreModule.forRoot()]
     });
 
-    beforeEach(async(() => {
+    beforeEach(() => {
         service = TestBed.get(ContentService);
-    }));
+    });
 
     beforeEach(() => {
         fixture = TestBed.createComponent(MediaPlayerComponent);
@@ -51,10 +48,13 @@ describe('Test Media player component ', () => {
         fixture.detectChanges();
     });
 
+    afterEach(() => {
+        fixture.destroy();
+    });
+
     it('should thrown an error If no url or no blob are passed', () => {
-        let change = new SimpleChange(null, null, true);
         expect(() => {
-            component.ngOnChanges({ 'blobFile': change });
+            component.ngOnChanges({});
         }).toThrow(new Error('Attribute urlFile or blobFile is required'));
     });