在angular jasmine中测试子组件ngOnChanges

import { ComponentFixture, TestBed } from '@angular/core/testing';
import { By } from '@angular/platform-browser';
import { SubComponent } from './sub.component';

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

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

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

  // 测试用例将在这里编写
});

it('should update the component property when input changes', () => {
  // 设置输入属性的初始值
  component.inputProperty = 'initial value';
  fixture.detectChanges();

  // 模拟输入属性的变化
  component.inputProperty = 'new value';
  fixture.detectChanges();

  // 断言组件属性已更新
  expect(component.componentProperty).toBe('new value');
});