如何在开玩笑中模拟此错误回调？

Question

send(message) {     
this.test.send(name, message, err => {
     if (err) {
        this.logger.info('error', err);
        return;
      }
      this._logger.info('successfully sent');
   });
  }

我的测试：

testClass.send（{value：＆＃39;嘿＆＃39;}）;

expect(sendSpy.mock.calls[0][0]).toEqual(name); // this works 
 expect(sendSpy.mock.calls[0][1]).toEqual(message); // this works 
 expect(sendSpy.mock.calls[0][2]).toBe(expect.anything) // this doesnt.

如何断言错误回调，以便覆盖所有行？