Given this test setup, what will component.getUserName() return?

Given this test setup, what will component.getUserName() return?

const mockUserService = { getName: () => 'Alice' };
TestBed.configureTestingModule({
  declarations: [UserComponent],
  providers: [{ provide: UserService, useValue: mockUserService }]
});
const fixture = TestBed.createComponent(UserComponent);
const component = fixture.componentInstance;