angular - 测试错误 - 开箱即用的创建组件失败

Question

我是新来的角度测试并且遇到了一些困难。创建新组件或服务时，会创建一个新的测试文件，如下所示（对于组件）。但是，运行 ng test 无法通过简单的“应该创建”测试并说“组件”变量为空。

我错过了什么？我需要为组件注入相同的依赖项吗？

import { async, ComponentFixture, TestBed } from '@angular/core/testing';

import { CreatorStudioComponent } from './creator-studio.component';

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

  beforeEach(async(() => {
    TestBed.configureTestingModule({
      declarations: [ CreatorStudioComponent ]
    })
    .compileComponents();
  }));

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

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