Intern: Polling Intern元素可见

Question

在Intern中有没有一种方法可以让我轮询，直到元素可见？我网站中的许多元素都在dom中，但却是隐藏的，所以每次我在应该出现的元素x之后执行"find for“元素时，它都会失败，因为该元素明显破坏了selenium检查的一个可见属性。

我试过助手函数"pollUntil“，但我似乎不能让它工作。Dojo似乎不喜欢document.getElement*()

传入pollUntil的帮助器函数

//this is a helper function for pollUntil
//first we want to find an element by class name and text
var elementVisibleAndText = function(elems, innerText){
        elems = document.getElementsByClassName(elems);
        //if we can't even find it, we return null
        //but if we do find it, we want to return a
        //not null element
        if (!elems || elems.length == 0){
            return null; 
        }

        //now let's look at all of the elements found by
        //in elems, and see if the innerHTML matches. If it 
        //does then we want to return that it was found
        var each;
        for(each in elems){
            if(elems[each].innerHTML == innerText)
                return (elems[each].offsetWidth > 0 && elems[each].offsetHeight > 0) ? elems[each] : null;
        }
        //else return null if nothing is found in the elements

        return null;
};  

Answer 1

查看https://theintern.github.io/leadfoot/pollUntil.html。实习生使用leadfoot -所以你应该有权使用这个功能。

var Command = require('leadfoot/Command');
var pollUntil = require('leadfoot/helpers/pollUntil');

new Command(session)
    .get('http://example.com')
    .then(pollUntil('return document.getElementById("a");', 1000))
    .then(function (elementA) {
        // element was found
    }, function (error) {
        // element was not found
    });

要在其中一个测试中使用该函数，您需要使用以下路径导入它：

'intern/dojo/node!leadfoot/helpers/pollUntil'

Answer 2

我经常遇到这个问题，我们使用intern的pollUntil功能编写了一些辅助工具。在我们的测试中，我们使用像.then(pollUntil(util.element_visible_by_class(), ['toast_notification'], 22000))这样的东西

在一个单独的util.js文件中

/**
 * Our shared utility for unit testing
 */
define([
    'intern!object',
    'intern/chai!assert',
    'require',
    'intern/dojo/node!leadfoot/helpers/pollUntil'

], function (registerSuite, assert, require, util, pollUntil) {
    return {
        element_visible_by_class: function(elem) {
            return function(elem) {
                elem = document.getElementsByClassName(elem);
                if (!elem || elem.length == 0) { return null; }
                elem = elem[0];
                return (elem.offsetWidth > 0 && elem.offsetHeight > 0) ? elem : null;
            }  
        },

        element_visible_by_id: function(elem) {
            return function(elem) {
                elem = document.getElementById(elem);
                if (!elem) { return null; }
                return (elem.offsetWidth > 0 && elem.offsetHeight > 0) ? elem : null;
            }  
        },
        element_hidden_by_id: function(elem) {
            return function(elem) {
                elem = document.getElementById(elem);
                if (!elem) { return null; }
                return (elem.offsetWidth > 0 && elem.offsetHeight > 0) ? null : elem;
            }  
        },
        element_hidden_by_class: function(elem) {
            return function(elem) {
                elem = document.getElementsByClassName(elem);
                if (!elem || elem.length == 0) { return null; }
                elem = elem[0];
                return (elem.offsetWidth > 0 && elem.offsetHeight > 0) ? null : elem;
            }  
        },
    }
})