我有一个功能checkIdleTime
,设定为定期调用。
componentDidMount() {
var idleCheck = setInterval(this.checkIdleTime.bind(this), authTimeoutSeconds * 1000);
this.setState({idleCheck: idleCheck});
document.onkeypress = this.setActive;
}
我想使用假计时器进行测试,但无法弄清楚如何,试过sinon
和jest
。
beforeEach(() => {
checkIdleTime = jest.spyOn(PureMain.prototype, 'checkIdleTime');
wrapper = shallow(
<PureMain/>
);
jest.useFakeTimers();
//clock = sinon.useFakeTimers();
});
it('should check the idle time after [authTimeoutSeconds] seconds of inactivity', () => {
wrapper.instance().componentDidMount();
var idleCheck_timeout = wrapper.instance().state.idleCheck;
expect(idleCheck_timeout).not.toEqual(null);
expect(idleCheck_timeout._idleTimeout).toBe(authTimeoutSeconds * 1000);
jest.runAllTimers();
//clock.tick(authTimeoutSeconds * 1000 * 2);
expect(setInterval).toHaveBeenCalledTimes(1);//not work
expect(checkIdleTime).toHaveBeenCalledTimes(1);//not work
})
收到错误:
预期模拟函数被调用一次,但它被称为零次。
我试图遵循这些例子
https://facebook.github.io/jest/docs/en/timer-mocks.html
http://sinonjs.org/releases/v1.17.7/fake-timers/
无法找到关于如何监视setInterval
expect(setInterval.mock.calls.length).toBe(1)
无法阅读财产&#39;来电&#39;未定义的
expect(setInterval).toHaveBeenCalledTimes(1)
值必须是模拟函数或间谍。
答案 0 :(得分:0)
原来间谍应该声明为:
setTimeout_spy = jest.spyOn(window, 'setTimeout');