我正在使用以下功能：
/**
* Click on the element with the provided xpath query
*
* @When /^I click on the element with xpath "([^"]*)"$/
*/
public function iClickOnTheElementWithXPath($xpath)
{
$session = $this->getSession(); // get the mink session
$element = $session->getPage()->find('xpath',$session->getSelectorsHandler()->selectorToXpath('xpath', $xpath)); // runs the actual query and returns the element
// errors must not pass silently
if (null === $element) {
throw new \InvalidArgumentException(sprintf('Could not evaluate XPath: "%s"', $xpath));
}
// ok, let's click on it
$element->click();
}
在我的 FeatureContext.php 中尝试单击具有以下 XPath 的按钮（Behat 步骤是）：当我单击具有 XPath 的元素时
//html/body/div[4]/div/div/div/div[2]/div[2]/div[4]/div/div/div/div[2]/ol/li/span[4]/a[1]
Firebug 对这个 XPath 很满意，但是 behat 给了我错误：
无法评估 XPath：“//html/body/div[4]/div/div/div/div[2]/div[2]/div[4]/div/div/div/div[2]/ol /li/span[4]/a[1]"
我究竟做错了什么？
这是 w3schools 上的 Behat 示例，尝试单击“自己尝试”按钮”：
Feature: xpath try on w3schools.com/tags/att_input_src.asp
Scenario: click button on xpath
@javascript
When I go to "/tags/att_input_src.asp"
And I click on the element with xpath "/html/body/div/div[3]/div[6]/div/a[1]"
And I wait 5 seconds
Then I should be on "tags/tryit.asp?filename=tryhtml_input_src"
给出相同的错误，无法评估 xpath，Firebug 上的 xpath 显示正确的按钮...