feat: add persistance to language selection

src/app/components/contact-list-table/contact-list-table.spec.ts

@@ -1,30 +1,33 @@
 import { ComponentFixture, TestBed } from '@angular/core/testing';
 
 import { ContactListTable } from './contact-list-table';
-import { STRINGS_INJECTOR } from '../../app.config';
 import { strings } from '../../strings';
 import { ContactService } from '../../services/contact.service';
 import { ContactDTO } from '../../models/ContactDTO';
 import { By } from '@angular/platform-browser';
 import { of } from 'rxjs';
 import { Router } from '@angular/router';
+import { LanguageManager } from '../../services/language-manager';
 
 describe('ContactListTable', () => {
   let component: ContactListTable;
   let fixture: ComponentFixture<ContactListTable>;
+
   let contactService: jasmine.SpyObj<ContactService>;
+  let languageManager: jasmine.SpyObj<LanguageManager>;
   let router: jasmine.SpyObj<Router>;
   let CONTACT_LIST_MOCK: ContactDTO[];
 
   beforeEach(async () => {
     contactService = jasmine.createSpyObj(ContactService.name, ['delete']);
+    languageManager = jasmine.createSpyObj(LanguageManager.name, [], { strings: strings.en });
     router = jasmine.createSpyObj(Router.name, ['navigate']);
     CONTACT_LIST_MOCK = [new ContactDTO(1, 'MOCK', 'MOCK', '5491122222222')];
     await TestBed.configureTestingModule({
       imports: [ContactListTable],
       providers: [
-        { provide: STRINGS_INJECTOR, useValue: strings },
         { provide: ContactService, useValue: contactService },
+        { provide: LanguageManager, useValue: languageManager },
         { provide: Router, useValue: router },
       ],
     }).compileComponents();