Angular Unit Testing - TodosComponent

todos.component.spec.ts

describe('TodosComponent', () => {
  let component: TodosComponent;
  let fixture: ComponentFixture<TodosComponent>;

  beforeEach(async(() => {
    TestBed.configureTestingModule({
      declarations: [ TodosComponent ],
      providers: [
        { provide: TodoService, useClass: TodoServiceMock }
      ]
    })
    .compileComponents();
  }));

  beforeEach(() => {
    fixture = TestBed.createComponent(TodosComponent);
    component = fixture.componentInstance;
    fixture.detectChanges();
  });

  it('should create', () => {
    expect(component).toBeTruthy();
  });
});