如何使用 XPath 获取特定表格单元格中的值

Question

我正在学习如何使用 Behat/Mink 和 Selenium 编写验收测试，我需要验证特定表格单元格的值。我发现我必须使用 xpath 来执行此操作，但我无法弄清楚确切的语法。表格如下：

html:

<table class="admintable generaltable" id="relationships">
<thead>
...
</tr>
</thead>
<tbody><tr class="r0 lastrow">
<td class="leftalign cell c0" style="">Cohort 1</td>
<td class="leftalign cell c1" style="">0</td>
<td class="leftalign cell c2" style="">Non-editing teacher</td>
<td class="centeralign cell c3" style="">No</td>
<td class="leftalign cell c4" style="">No</td>
<td class="leftalign cell c5 lastcol" style=""><a href="http://150.162.242.121/mariana/unasus-cp/local/relationship/edit_cohort.php?relationshipcohortid=1&amp;delete=1"><img src="http://150.162.242.121/mariana/unasus-cp/theme/image.php/standard/core/1445875205/t/delete" alt="Delete" title="Delete" class="iconsmall" /></a> <a href="http://150.162.242.121/mariana/unasus-cp/local/relationship/edit_cohort.php?relationshipcohortid=1"><img src="http://150.162.242.121/mariana/unasus-cp/theme/image.php/standard/core/1445875205/t/edit" alt="Edit" title="Edit" class="iconsmall" /></a></td>
</tr>
</tbody>
</table>

我要写的语句是：

Then I should see "No" in the "???" "css_element"

我应该如何写该语句以指定我想要第一个“否”，在“Inscrição em vários grupos”下，在“否”部分。

编辑：我最初犯了一个错误，我应该使用“xpath_element”作为选择器，而不是“css_element”

Answer 1

我假设Inscrição em vários grupos 文本总是出现在第四列。为此编写 XPath 非常简单，因为我们可以直接使用索引。

//table[@id='relationships']/tbody/tr[1]/td[4]

如果标题列的列号发生变化，您必须找到Inscrição em vários grupos 标题的索引（列号），然后使用它找到对应的值列。

-- the below code will get you the index of the heading column
count(//thead//tr/th[.='Inscrição em vários grupo']/preceding-sibling::*)+1

-- use this index to find the corresponding value
//table[@id='relationships']/tbody/tr[1]/td[count(//thead//tr/th[.='Inscrição em vários grupo']/preceding-sibling::*)+1]

注意：索引从 1 而非 0 开始

从以下链接来看，behat 中的语法似乎如下：

How to assert that a text only exists 1 time in Mink

https://stackoverflow.com/questions/32202047/could-not-find-element-with-xpath-in-behat-mink

$session = $this->getMainContext()->getSession();
$element = $session->getPage()->find(
        'xpath',
        $session->getSelectorsHandler()->selectorToXpath('xpath', '//table[@id='relationships']/tbody/tr[1]/td[4]');
$elementText = $element->getText();

if ($elementText != 'no') {
    throw new Exception('Value us not correct');
}

Answer 2

我知道您已经接受了答案，但您是否尝试过像 td.c3 这样的简单 CSS 选择器？这对我来说似乎更直接。