捕获Selenium中的JavaScript错误

Question

有没有办法捕获in DOM中发生的错误,Selenium并可能标记为与页面中的错误相同？

举一个简短的例子,假设我试图在一个不存在的HTML控件上绑定一个事件,我的浏览器会抛出一个错误说:

element abcd not found in the console.

现在,如果我希望同样的错误使我的selenium测试失败,并且浏览器上显示的消息显示为错误消息.

可以这样做吗？

Answer 1

我这样做是为了捕获JavaScript错误:

[TestCleanup]
public void TestCleanup()
{
    var errorStrings = new List<string> 
    { 
        "SyntaxError", 
        "EvalError", 
        "ReferenceError", 
        "RangeError", 
        "TypeError", 
        "URIError" 
    };

    var jsErrors = Driver.Manage().Logs.GetLog(LogType.Browser).Where(x => errorStrings.Any(e => x.Message.Contains(e)));

    if (jsErrors.Any())
    {
        Assert.Fail("JavaScript error(s):" + Environment.NewLine + jsErrors.Aggregate("", (s, entry) => s + entry.Message + Environment.NewLine));
    }
}

Answer 2

将此脚本放在您的页面上,然后在Selenium中检查JSError:

<script type="text/javascript">
    window.onerror=function(msg){
        $("body").attr("JSError",msg);
    }
</script>

Answer 3

不知道什么时候改变了,但是现在这对我来说在Python中起作用了.该文件是一个带有javascript错误的简单页面.

In [11]: driver.get("file:///tmp/a.html")

In [12]: driver.get_log("browser")
Out[12]: 
[{u'level': u'SEVERE',
  u'message': u'ReferenceError: foo is not defined',
  u'timestamp': 1450769357488,
  u'type': u''},
 {u'level': u'INFO',
  u'message': u'The character encoding of the HTML document was not declared. The document will render with garbled text in some browser configurations if the document contains characters from outside the US-ASCII range. The character encoding of the page must be declared in the document or in the transfer protocol.',
  u'timestamp': 1450769357498,
  u'type': u''}]

Python-Selenium版本2.48.0 Linux Firefox 43.0

Answer 4

这是我使用的python webdriver解决方案:

def check_browser_errors(driver):
    """
    Checks browser for errors, returns a list of errors
    :param driver:
    :return:
    """
    try:
        browserlogs = driver.get_log('browser')
    except (ValueError, WebDriverException) as e:
        # Some browsers does not support getting logs
        LOGGER.debug("Could not get browser logs for driver %s due to exception: %s",
                     driver, e)
        return []

    errors = []
    for entry in browserlogs:
        if entry['level'] == 'SEVERE':
            errors.append(entry)
    return errors

Answer 5

JSErrorCollector完成了这项工作.

配置完成后,问题是:

List<JavaScriptError> jsErrorList = JavaScriptError.readErrors(driver);