量角器:无法使用 by.deepCss('input') 选择阴影 DOM(聚合物)内的输入元素 [英] Protractor: Unable select input element inside a shadow DOM (Polymer) using by.deepCss('input')

问题描述

环境:Angular(带有 Polymer Web 组件的 v5 应用程序.用于运行 e2e 测试的量角器.

Environment: Angular (v5 Application with Polymer Web Components. Protractor for running e2e tests.

Angular CLI: 1.6.4
Node: 6.10.0
Angular: 5.2.0
@angular/cli: 1.6.4
typescript: 2.5.3

下面给出的是我在 chrome 中扩展的聚合物 Web 组件阴影根.您可以在此自定义元素中看到输入 type = "text".

Below given is my polymer web component shadow root expanded in chrome. You could see input type = "text" inside this custom element.

我无法使用量角器 by.deepCss 访问自定义聚合物组件内的输入元素.

I am unable to access input element inside custom polymer component using protractor by.deepCss.

var polymerFirstName = element(by.className('polyFName'));

var inputs = polymerFirstName.element(by.deepCss('input')); // returns nothing.

我需要访问内部输入元素，以便执行 UI 自动化任务.

I need to access the inner input element so that I can perform UI Automation tasks like.

element(by.deepCss('input')).clear();

element(by.deepCss('input')).sendKeys('Ritchie');

如果我尝试直接在 Polymer 组件上调用 .clear 或 .sendKeys 它将失败并显示 "Failed: invalid element state: Element must be user-可编辑以清除它".基本上我不能调用 .clear 或 .sendKeys 到使用 Polymer 创建的自定义输入元素.

If I try to invoke .clear or .sendKeys directly on Polymer components it will fail with "Failed: invalid element state: Element must be user-editable in order to clear it". Basically I cannot call .clear or .sendKeys on to custom input element created using Polymer.

如何通过量角器测试访问 shadow DOM 内的内部输入元素?

How can I access inner input element inside shadow DOM from a protractor test?

谢谢

巴桑特

推荐答案

只需新建一个定位器:

/**
 * Usage:
 *   O  element(by.css_sr('#parentElement #innerElement'))          <=> $('#parentElement #innerElement')
 *   O  element(by.css_sr('#parentElement::sr #innerElement'))      <=> $('#parentElement').shadowRoot.$('#innerElement')
 *   O  element.all(by.css_sr('#parentElement .inner-element'))     <=> $$('#parentElement .inner-element')
 *   O  element.all(by.css_sr('#parentElement::sr .inner-element')) <=> $$('#parentElement').shadowRoot.$$('.inner-element')
 *   O  parentElement.element(by.css_sr('#innerElement'))           <=> parentElement.$('#innerElement')
 *   O  parentElement.element(by.css_sr('::sr #innerElement'))      <=> parentElement.shadowRoot.$('#innerElement')
 *   O  parentElement.all(by.css_sr('.inner-element'))              <=> parentElement.$$('.inner-element')
 *   O  parentElement.all(by.css_sr('::sr .inner-element'))         <=> parentElement.shadowRoot.$$('.inner-element')
 */
by.addLocator('css_sr', (cssSelector: string, opt_parentElement, opt_rootSelector) => {
    let selectors = cssSelector.split('::sr');
    if (selectors.length === 0) {
        return [];
    }

    let shadowDomInUse = (document.head.createShadowRoot || document.head.attachShadow);
    let getShadowRoot  = (el) => ((el && shadowDomInUse) ? el.shadowRoot : el);
    let findAllMatches = (selector: string, targets: any[], firstTry: boolean) => {
        let using, i, matches = [];
        for (i = 0; i < targets.length; ++i) {
            using = (firstTry) ? targets[i] : getShadowRoot(targets[i]);
            if (using) {
                if (selector === '') {
                    matches.push(using);
                } else {
                    Array.prototype.push.apply(matches, using.querySelectorAll(selector));
                }
            }
        }
        return matches;
    };

    let matches = findAllMatches(selectors.shift().trim(), [opt_parentElement || document], true);
    while (selectors.length > 0 && matches.length > 0) {
        matches = findAllMatches(selectors.shift().trim(), matches, false);
    }
    return matches;
});

请参阅此处获取帮助.

你可以这样称呼它:

inputs = element(by.css_sr('.polyFName::sr input'))
// OR
inputs = polymerFirstName.element(by.css_sr('::sr input')
inputs.clear();

这篇关于量角器:无法使用 by.deepCss('input') 选择阴影 DOM(聚合物)内的输入元素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！