如何使用angular 7 karma/jasmine对@hostlistener粘贴事件进行单元测试

npm install karma jasmine karma-jasmine karma-chrome-launcher --save-dev

import { ComponentFixture, TestBed } from '@angular/core/testing';
import { TestComponent } from './test.component';

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

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

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

  // 单元测试代码将在这里编写
});

it('should handle paste event', () => {
  const event = new ClipboardEvent('paste');
  // 设置粘贴事件的相关属性，例如文本内容等
  // event.clipboardData.setData('text/plain', 'Hello, World!');
  // ...

  // 触发组件上的@HostListener粘贴事件
  component.onPaste(event);

  // 断言期望的行为和结果
  // expect(component.someProperty).toBe(expectedValue);
  // ...
});

ng test