ag-Grid:如何从单元测试访问gridApi？

import { TestBed } from '@angular/core/testing';
import { AgGridModule } from 'ag-grid-angular';
import { MyGridComponent } from './my-grid.component';

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

  beforeEach(async(() => {
    TestBed.configureTestingModule({
      imports: [AgGridModule],
      declarations: [MyGridComponent]
    })
    .compileComponents();
  }));

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

  it('should access gridApi', () => {
    const gridOptions = component.gridOptions;
    const gridApi = gridOptions.api;

    expect(gridApi).toBeDefined();
    // Perform further assertions or operations using gridApi
  });
});