从ElementFinder数组中创建ElementArrayFinder [英] Making ElementArrayFinder from an array of ElementFinders
问题描述
这是采取的后续问题元素的条件评估为true(扩展ElementArrayFinder)主题,特别是@ cvakiitho的答案。
This is a follow-up question to Take elements while a condition evaluates to true (extending ElementArrayFinder) topic and @cvakiitho's answer in particular.
问题:
执行以下代码后:
var i = 0;
var el = element.all(by.css('ul li a'));
var tableItems = [];
(function loop() {
el.get(i).getText().then(function(text){
if(text){
tableItems.push(el.get(i));
i+=1;
loop();
}
});
}());
tableItems
将包含<$的数组c $ c> ElementFinder 实例 - 或者,简单来说 - 一个Web元素数组。
tableItems
would contain an array of ElementFinder
instances - or, to put it simple - an array of web elements.
问题:
是否可以转换<$的数组? c $ c> ElementFinder s到 ElementArrayFinder
实例?
Is it possible to convert an array of ElementFinder
s to an ElementArrayFinder
instance?
动机:
我想要的原因是拥有所有方便的 ElementArrayFinder
功能实用程序,例如 map()
, each()
, reduce()
并且能够在其上调用 getText()
将解析成元素文本数组的承诺。
The reason I want this is to have all of the convenient ElementArrayFinder
functional utilities, like map()
, each()
, reduce()
and to be able to call getText()
on it producing a promise which would resolve into an array of element texts.
推荐答案
ElementArrayFinder
的构造函数基本上需要两个主要参数:量角器实例和函数 getWebElements
,它应该返回一个解析为Web元素数组的promise。每当 ElementFinder
有一个方法来获取名为 getWebElement
的Web元素时,就可以创建这样的函数。
Constructor of ElementArrayFinder
basically requires two main arguments: protractor instance and a function getWebElements
, which should return a promise resolving to an array of Web Elements. As soon as every ElementFinder
has a method to get it's Web Element called getWebElement
, it is possible to create such a function.
var arrayOfElementFinders = [el1, el2, el3];
var getWebElements = function () {
// create array of WebElements from array of ElementFinders
var webElements = arrayOfElementFinders.map(function (ef) {
return ef.getWebElement();
});
// immediately resolve and return promise
return protractor.promise.fulfilled(webElements);
};
现在,当满足所有要求时,可以创建 ElementArrayFinder
:
Now when all requirements are satisfied, it is possible to create a new instance of ElementArrayFinder
:
var elArrayFinder = new protractor.ElementArrayFinder(protractor, getWebElements);
为了方便使用,我会向 ElementArrayFinder <添加一个静态方法/ code>构造函数并在测试开始之前将其包含在某处:
To make it easy to use I would add a static method to ElementArrayFinder
constructor and include it somewhere before tests start:
protractor.ElementArrayFinder.fromArray = function (arrayOfElementFinders) {
var getWebElements = function () {
var webElements = arrayOfElementFinders.map(function (ef) {
return ef.getWebElement();
})
return protractor.promise.fulfilled(webElements);
};
return new protractor.ElementArrayFinder(protractor, getWebElements);
};
并在以下测试中使用它:
And use it in tests like:
var elArrayFinder = protractor.ElementArrayFinder.fromArray(arrayOfElementFinders);
这篇关于从ElementFinder数组中创建ElementArrayFinder的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!