Angular 测试如何防止 ngOnInit 调用直接测试方法

Angular测试：防止直接测试ngOnInit方法的方法

typescript
import { ComponentFixture, TestBed } from '@angular/core/testing';
import { MyComponent } from './my.component';
describe('MyComponent', () => {
  let component: MyComponent;
  let fixture: ComponentFixture;
  beforeEach(() => {
    TestBed.configureTestingModule({
      declarations: [MyComponent],
    });
    fixture = TestBed.createComponent(MyComponent);
    component = fixture.componentInstance;
  });
  it('should call ngOnInit and perform initialization', () => {
    spyOn(component, 'ngOnInit').and.callThrough();
    fixture.detectChanges(); // 触发 ngOnInit
    expect(component.ngOnInit).toHaveBeenCalled();
    // 在这里添加更多的断言，测试ngOnInit内部逻辑
  });
  // 其他测试用例...
});