Javascript TypeError:尝试将已存根的滚动条换行到
我最近为react组件编写了一个测试，它在单击按钮时将窗口滚动到顶部 我编写的测试文件在NodeJS 6.9上没有错误，不幸的是，当我升级到NodeJS 7.4时，我开始收到标题中提到的错误 在过去的两天里，我一直在阅读并尝试各种方法/调试这个问题，但我对此束手无策。非常感谢您的帮助 该问题的所有其他相关但非必要信息可在其回购协议中查看： test.jsJavascript TypeError:尝试将已存根的滚动条换行到,javascript,node.js,mocha.js,sinon,chai,Javascript,Node.js,Mocha.js,Sinon,Chai,我最近为react组件编写了一个测试，它在单击按钮时将窗口滚动到顶部 我编写的测试文件在NodeJS 6.9上没有错误，不幸的是，当我升级到NodeJS 7.4时，我开始收到标题中提到的错误 在过去的两天里，我一直在阅读并尝试各种方法/调试这个问题，但我对此束手无策。非常感谢您的帮助 该问题的所有其他相关但非必要信息可在其回购协议中查看： test.js import { jsdom } from 'jsdom'; var exposedProperties = ['window', 'na
import { jsdom } from 'jsdom';
var exposedProperties = ['window', 'navigator', 'document'];
global.document = jsdom('<!doctype html><html><body style="height:2000px"></body></html>');
global.window = document.defaultView;
Object.keys(document.defaultView).forEach((property) => {
if (typeof global[property] === 'undefined') {
global[property] = document.defaultView[property];
}
});
global.navigator = {
userAgent: 'node.js'
};
require('raf').polyfill()
import React from 'react';
import { mount } from 'enzyme';
import sinon from 'sinon';
import TestUtils from 'react-addons-test-utils';
import ScrollUpButton from '../react-scroll-up-button';
import { expect } from 'chai';
//Testing group
describe('Testing <ScrollUpButton/> Action scroll to default top:', ()=>{
let Component, ScrollTo_Stub;
before(()=>{
window.pageYOffset = 0
//Render component
Component = mount(<ScrollUpButton />);
//Settup stub and replace scrollTo function with ours.
// TypeError: Attempted to wrap scrollTo which is already stubbed
ScrollTo_Stub = sinon.stub(window, 'scrollTo').callsFake((x,y)=>{
window.pageXOffset = x;
window.pageYOffset = y;
Component.instance().HandleScroll(); // <-- call HandleScroll so the test can simulate the button being toggled
});
})
after(()=>{
ScrollTo_Stub.restore(); // <-- Restore the objects method
//window.scrollTo.restore(); // <-- Restore the objects method
})
//did it scroll the page up
it('did scroll the page to 0', (done) => {
expect(Component.state().ToggleScrollUp).to.equal(''); // <-- Is the button hidden
window.pageYOffset = 300 // <-- scroll window down to prepare for smulation
Component.instance().HandleScroll(); // <-- call handleScroll since we scrolled the window down.
expect(Component.state().ToggleScrollUp).to.equal(true); // <-- Is the button visible
Component.instance().HandleClick(); // <-- call HandleClick to start the scroll up simulation.
//Well wait a little bit to let the simulation complete
setTimeout(()=>{
expect(ScrollTo_Stub.lastCall.args[1]).to.within(-10,10); // <-- is pageYOffset between -10 and 10
expect(Component.state().ToggleScrollUp).to.equal(''); // <-- Button should be hidden again
done() // <-- since were asynchronous with setTimeout instruct chai that were done with the test.
}, 500);
});
});
window.scrollTo = null;