Angular单元测试错误-无法绑定到'formGroup‘，因为它不是'form’的已知属性

import { FormsModule, ReactiveFormsModule } from '@angular/forms';

beforeEach(async(() => {
  TestBed.configureTestingModule({
    imports: [FormsModule, ReactiveFormsModule],
    declarations: [YourComponent]
  })
  .compileComponents();
}));

it('should create', () => {
  fixture = TestBed.createComponent(YourComponent);
  component = fixture.componentInstance;
  fixture.detectChanges();
  expect(component).toBeTruthy();
});

ng test