如何使用jasmine大理石测试可观察订阅中的代码

// 假设要测试的代码文件是observable.js
// observable.js中定义了一个可观察对象，并在订阅时输出一条消息

// observable.js
const { Observable } = require('rxjs');

const observable = new Observable((subscriber) => {
  subscriber.next('Hello');
  subscriber.next('World');
  subscriber.complete();
});

observable.subscribe({
  next: (value) => console.log(value),
  complete: () => console.log('Complete'),
});

// observable.spec.js
const { Observable } = require('rxjs');

describe('Observable', () => {
  it('should emit values and complete', () => {
    const observable = new Observable((subscriber) => {
      subscriber.next('Hello');
      subscriber.next('World');
      subscriber.complete();
    });

    const nextSpy = jasmine.createSpy('next');
    const completeSpy = jasmine.createSpy('complete');

    observable.subscribe({
      next: nextSpy,
      complete: completeSpy,
    });

    expect(nextSpy).toHaveBeenCalledTimes(2);
    expect(nextSpy).toHaveBeenCalledWith('Hello');
    expect(nextSpy).toHaveBeenCalledWith('World');
    expect(completeSpy).toHaveBeenCalled();
  });
});