feat: add persistance to language selection

src/app/components/contact-search-bar/contact-search-bar.spec.ts

@@ -1,19 +1,22 @@
 import { ComponentFixture, TestBed } from '@angular/core/testing';
 
 import { ContactSearchBar } from './contact-search-bar';
-import { STRINGS_INJECTOR } from '../../app.config';
 import { strings } from '../../strings';
+import { LanguageManager } from '../../services/language-manager';
 
 describe('ContactSearchBar', () => {
   let component: ContactSearchBar;
   let fixture: ComponentFixture<ContactSearchBar>;
 
+  let languageManager: jasmine.SpyObj<LanguageManager>;
+
   beforeEach(async () => {
+    languageManager = jasmine.createSpyObj(LanguageManager.name, [], { strings: strings.en });
+
     await TestBed.configureTestingModule({
       imports: [ContactSearchBar],
-      providers: [{provide: STRINGS_INJECTOR, useValue: strings}]
-    })
-    .compileComponents();
+      providers: [{ provide: LanguageManager, useValue: languageManager }],
+    }).compileComponents();
 
     fixture = TestBed.createComponent(ContactSearchBar);
     component = fixture.componentInstance;