selenium - Xpath 使用匹配项和正则表达式在 Xpath 测试器中工作，但在代码中抛出 InvalidSelectorException 无法在 'evaluate' 上执行 'Document'

Question

HTML

<div class="top-section" style="" xpath="1">
         <input id="role" value="admin" hidden="">
            <small>Welcome </small> <b style="">8828024404, MCGM</b>
            <a href=""><img alt="Attendance" width="" height="" src="css/assets/images/logo.png"></img></a>
            <a href="/logout" class="float-right logout">Log Out</a>
        </input>
</div>

要搜索的字符串

8828024404, MCGM

Xpath 表达式

//b[matches(text(),'[0-9]{10}, [A-Za-z]*')]

异常

org.openqa.selenium.InvalidSelectorException: invalid selector: Unable to locate an element with the xpath expression //b[matches(text(),'[0-9]{10}, [A-Za-z]')] because of the following error: SyntaxError: Failed to execute 'evaluate' on 'Document': The string '//b[matches(text(),'[0-9]{10}, [A-Za-z]')]' is not a valid XPath expression. (Session info: chrome=70.0.3538.102) (Driver info: chromedriver=2.42.591088 (7b2b2dca23cca0862f674758c9a3933e685c27d5),platform=Windows NT 10.0.16299 x86_64) (WARNING: The server did not provide any stacktrace information) Command duration or timeout: 0 milliseconds

Answer 1

Selenium 支持 XPath 1.0 版本，而 fn:matches 来自 XPath 2.0。

如果您想匹配以逗号前 10 位数字开头的粗体文本，您可以尝试下面的 XPath

//b[string-length(substring-before(., ','))=10 and number(substring-before(., ','))]

如果您对所需元素有更多限制，请告诉我