text: import SomeClass from './SomeClass';
  import Rx from 'rxjs/Rx.js';
  
  jest.mock('rxjs/Rx.js', () => {
    return { Subject: jest.fn() };
  });
  
  describe('65261235', () => {
    it('should pass', () => {
      let someClass = new SomeClass();
      expect(Rx.Subject).toBeCalledTimes(1);
    });
  });
  