React检测到MyComponent调用的Hooks顺序发生了变化

时间:2020-08-10 21:19:46

标签: reactjs jestjs enzyme

该组件以前没有使用useRef钩子,我添加了一个ref来处理一些调整大小的更改,等等。起初一切都很好,测试通过了,不知道我更改了什么,现在它相信状态了挂钩渲染之间的更改。

以下是声明钩子的唯一地方,我应该包括设置状态的地方吗? (在useLayoutEffect中设置,然后在onScroll处理程序中设置)

错误:

Should have a queue. This is likely a bug in React. Please file an issue.

控制台消息:

 React has detected a change in the order of Hooks called by MyComponent. This will lead to bugs and errors if not fixed.
    
       Previous render            Next render
       ------------------------------------------------------
    1. useRef                     useState
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      66 |     const refContainer = useRef<HTMLUListElement>();
    > 67 |     const [ state1, setState1 ] = React.useState('none');
         |                                         ^
      68 |     const [ state2, setState2 ] = React.useState<boolean[]>(new Array(React.Children.count(children)).fill(false));

组件:

const myComponent = (props: PropType): JSX.Element => {
    const refContainer = useRef<HTMLUListElement>();
    const [ state1, setState1 ] = React.useState('none'); // 
    const [ state2, setState2 ] = React.useState<boolean[]>(new Array(React.Children.count(children)).fill(false));
...

}

测试:

    it('scroll', () => {
        const ref = jest.spyOn(React, 'useRef').mockReturnValueOnce({ current: { scrollLeft: 26, offsetWidth: 24, scrollWidth: 50 } });
        myComponent.find('.x').simulate('scroll', ref);
        expect(myComponent.find('.x').hasClass('y')).toBeTruthy();
        expect(myComponent.find('.x').hasClass('y')).toBeFalsy();
    });

0 个答案:

没有答案