Angular 4:如何在订阅中测试事件

import { TestBed } from '@angular/core/testing';
import { Observable, of } from 'rxjs';

describe('EventSubscriptionTest', () => {
  let eventSource: Observable<any>;

  beforeEach(() => {
    TestBed.configureTestingModule({});
    eventSource = of('test event');
  });

  it('should handle event subscription', () => {
    let eventHandled = false;

    eventSource.subscribe((event) => {
      eventHandled = true;
      // Perform assertions on the event or any other expected behavior
      expect(event).toBe('test event');
    });

    // Trigger the event
    eventSource.subscribe(); // Or use any other method to trigger the event

    // Assert that the event was handled
    expect(eventHandled).toBe(true);
  });
});