//...
import { SalaryhufPipe } from './shared/pipe/salaryhuf.pipe'; //<---

describe('AppComponent', () => {
  beforeEach(async () => {
    await TestBed.configureTestingModule({
      declarations: [
        AppComponent,
        SalaryhufPipe     // <-------------
      ],
    }).compileComponents();
  });

//...
});