如何为我的angular2表单编写使用香菜验证的jasmine单元测试？

 selector: 'app-form',

 template: `

   <form [formGroup]="myForm">

     <input type="text" formControlName="name">

     <button (click)="submitForm()">Submit</button>

   </form>

 `

 myForm: FormGroup;

 constructor() {

   this.myForm = new FormGroup({

     name: new FormControl('', Validators.required)

   });

 }

 submitForm() {

   if (this.myForm.valid) {

     // 处理表单提交逻辑

   }

 }

 let component: FormComponent;

 let fixture: ComponentFixture<FormComponent>;

 beforeEach(async () => {

   await TestBed.configureTestingModule({

     imports: [ReactiveFormsModule],

     declarations: [FormComponent]

   }).compileComponents();

 });

 beforeEach(() => {

   fixture = TestBed.createComponent(FormComponent);

   component = fixture.componentInstance;

   fixture.detectChanges();

 });

 it('should create', () => {

   expect(component).toBeTruthy();

 });

 it('should validate name field', () => {

   const nameControl = component.myForm.get('name');

   nameControl.setValue('');

   expect(nameControl.valid).toBeFalsy();

   nameControl.setValue('John Doe');

   expect(nameControl.valid).toBeTruthy();

 });

 // 添加更多的测试用例...

 it('should submit form when valid', () => {

   spyOn(component, 'submitForm');

   const submitButton = fixture.nativeElement.querySelector('button');

   submitButton.click();

   expect(component.submitForm).toHaveBeenCalled();

 });