我无法在Angular中比较组件测试中的日期

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

import { MyComponent } from './my.component';

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

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

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

  it('should compare dates in component test', () => {
    const date1 = new Date('2022-01-01');
    const date2 = new Date('2022-01-02');

    component.date = date1;
    fixture.detectChanges();

    const dateElement = fixture.debugElement.query(By.css('.date')).nativeElement;
    expect(dateElement.textContent).toBe(date1.toISOString());

    component.date = date2;
    fixture.detectChanges();

    expect(dateElement.textContent).toBe(date2.toISOString());
  });
});