如何计算匹配我的CSS选择器的元素的数量？ [英] How can I count the number of elements that match my CSS selector?

问题描述

我试图使用SeleniumRC测试我的GWT应用程序，并尝试使用CSS选择器匹配元素。

I am trying to use SeleniumRC to test my GWT App and am trying to match elements using CSS selectors.

我想计算的启用按钮的数量

I want to count the number of enabled buttons in the following HTML.

如果某个按钮位于< td> 下且 < td> 和时禁用。

A button is enabled if it is under a <td> with class="x-panel-btn-td " and disabled if it is under a <td> with class="x-panel-btn-td x-hide-offsets".

基本上，我想检索按钮数 x-panel-btn-td 下所有< td>
$ b

So basically, I want to retrieve the number of buttons under all <td>s with the class x-panel-btn-td.

<table cellspacing="0">
    <tbody>
    <tr>
        <td id="ext-gen3504" class="x-panel-btn-td ">
            <em unselectable="on">
                <button id="ext-gen3506" class="x-btn-text" type="button">OK</button>
            </em>
        </td>
        <td id="ext-gen3512" class="x-panel-btn-td x-hide-offsets">
            <em unselectable="on">
                <button id="ext-gen3506" class="x-btn-text" type="button">Yes</button>
            </em>
        </td>
        <td id="ext-gen3520" class="x-panel-btn-td">
            <em unselectable="on">
                <button id="ext-gen3506" class="x-btn-text" type="button">No</button>
            </em>
        </td>
        <td id="ext-gen3528" class="x-panel-btn-td x-hide-offsets">
            <em unselectable="on">
                <button id="ext-gen3506" class="x-btn-text" type="button">Cancel</button>
            </em>
        </td>
    </tr>
    </tbody>
</table>

推荐答案

据我所知，这使用CSS选择器，但在Selenium中有一个命令通过XPath计数。以下命令将验证有两个已禁用的按钮：

As far as I am aware you can't do this using CSS selectors, but there is a command in Selenium for counting by XPath. The following command will verify there are two disabled buttons:

verifyXpathCount | //td[contains(@class, 'x-hide-offsets')]//button | 2

在Selenium RC（Java）中看起来更像

In Selenium RC (Java) this would look more like

assertEquals(selenium.getXpathCount("//td[contains(@class, 'x-hide-offsets')]//button"), 2);

这篇关于如何计算匹配我的CSS选择器的元素的数量？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！