Java 使用chrome浏览器的RemoteDriver在下拉菜单上失败

我使用的是selenium-standalon-2.25.0，chrome是13版

以下是html：

<select name="suffix" class="select">
<option value="" selected>Please select...</option>
<option value="Ms.">Ms.</option>
<option value="Mrs.">Mrs.</option>
<option value="Mr.">Mr.</option>
</select>

这是我得到的一个例外：

org.openqa.selenium.InvalidSelectorException: findElement execution failed;
 Unable to locate an element with the xpath expression //option[@value='Ms.' and ..[@name='suffix']] because of the following error:
Error: INVALID_EXPRESSION_ERR: DOM XPath Exception 51 (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 52 milliseconds
For documentation on this error, please visit: http://seleniumhq.org/exceptions/invalid_selector_exception.html
Build info: version: '2.25.0', revision: '17482', time: '2012-07-18 21:08:56'
System info: os.name: 'Windows 7', os.arch: 'x86', os.version: '6.1', java.version: '1.6.0_25'
Driver info: driver.version: EventFiringWebDriver
Session ID: bf6368f23db4a2fe27d9b96849af1b1d
Command duration or timeout: 646 milliseconds
For documentation on this error, please visit: http://seleniumhq.org/exceptions/invalid_selector_exception.html
Build info: version: '2.25.0', revision: '17482', time: '2012-07-18 21:09:54'
System info: os.name: 'Linux', os.arch: 'amd64', os.version: '3.2.0-31-generic', java.version: '1.6.0_31'
Driver info: driver.version: RemoteWebDriver
Session ID: 134947044387

我已经在这方面工作了一段时间，我猜这与我的findElement声明有关。奇怪的是，它与FF和IE配合得很好。任何帮助都将不胜感激。再次感谢

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布莱恩

换一种方式做

//select[@name='suffix']/option[@value='Ms.']

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您的XPath查询似乎无效。它甚至没有逻辑意义。沿着树往下走，而不是往上走。

除了Arran提到的方法之外，还可以尝试使用css选择器。它们比XPath工作得更快

String msCssSelector= "select[name='suffix']>option[value='Ms.']"
String mrsCssSelector=  "select[name='suffix']>option[value='Mrs.']"
String mrCssSelector=  "select[name='suffix']>option[value='Mr.']"

也不要忘记验证在firepath中找到的定位器，ffox中的firebug插件

方法1

方法2使用actions builder API

WebElement mnuOptionElement;
mnuOptionElement = driver.findElement(By.cssSelector(mrCssSelector));
Actions builder = new Actions(driver);
// Move cursor to the Main Menu Element
builder.moveToElement(mnuOptionElement).click();

有关Actions builder的更多信息，您可以获得

方法3使用jsExecutor单击web元素。在任何情况下都适用于我

JavascriptExecutor js = (JavascriptExecutor) driver;
        StringBuilder stringBuilder = new StringBuilder();
        stringBuilder.append("var x = $(\'"+msCssSelector+"\');");
        stringBuilder.append("x.click();");
        js.executeScript(stringBuilder.toString());

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希望这对您现在起作用）

谢谢Arran，就这样。我不知道为什么我决定爬上树而不是倒下来。事实上，我甚至对它在FF和IE中的工作感到惊讶。谢谢，我不知道CSS选择器的工作速度比xpath快。我以后一定会用这个。

WebElement mnuOptionElement;
mnuOptionElement = driver.findElement(By.cssSelector(mrCssSelector));
Actions builder = new Actions(driver);
// Move cursor to the Main Menu Element
builder.moveToElement(mnuOptionElement).click();

JavascriptExecutor js = (JavascriptExecutor) driver;
        StringBuilder stringBuilder = new StringBuilder();
        stringBuilder.append("var x = $(\'"+msCssSelector+"\');");
        stringBuilder.append("x.click();");
        js.executeScript(stringBuilder.toString());