检查函数是否已被调用，Angular单元测试

import { MyService } from './my.service';

describe('MyService', () => {
  let service: MyService;

  beforeEach(() => {
    service = new MyService();
  });

  it('should check if a function is called', () => {
    spyOn(service, 'myFunction');
    service.myFunction();
    expect(service.myFunction).toHaveBeenCalled();
  });
});

import { MyService } from './my.service';

describe('MyService', () => {
  let service: MyService;

  beforeEach(() => {
    service = new MyService();
  });

  it('should check if a function is called with correct arguments', () => {
    spyOn(service, 'myFunction');
    service.myFunction(123, 'abc');
    expect(service.myFunction).toHaveBeenCalledWith(123, 'abc');
  });
});