Question

我遇到了一个JS Alert框的问题，它被认为是有效的，但突然之间突然出现了这个问题。

selenium.common.exceptions.WebDriverException: Message: [JavaScript Error: "e is null" {file: "file:///var/folders/8t/n1tmxt2s4cjc_g3hc_4sm6_x3_m7_l/T/tmpTmBrlm/extensions/fxdriver@googlecode.com/components/command-processor.js" line: 7854}] ...

我不知道你们是否可以帮助我。这是python selenium代码，浏览器是Firefox 32到34。

我的代码在

之下

def testArticleDekExternalLinksTest(self):
        """Practitest id :305"""
        addArticlePage = AP.AddArticlePage(self.driver,"m.php?t=articles") 
        addArticlePage.getRandomEditorialArticle()
        keys = "https://www.google.com/?gws_rd=ssl"
        addArticlePage.clickDekExternalLinks()

        alert = self.driver.switch_to.alert
        print alert
        alert.send_keys(keys)
        alert.accept()
        self.assertTrue(addArticlePage.save(), "cannot save an Article")
        self.driver.refresh()
        addArticlePage.clickHtmlView(0)
        time.sleep(2)
        assert keys in addArticlePage.getDekContentUrlStripped()

        addArticlePage.loadUrl(addArticlePage.getPreviewUrl())
        articlePage = ArticlePage.ArticlePage(self.driver)

如果我尝试打印警报，我可以看到警报对象，即使添加时间也没有帮助，最奇怪的部分是它以前工作而现在不工作.. Selenium版本是2.45.0

Answer 1

确定。对我来说这似乎是一个等待问题。尝试使用explicit wait并在某个时候发出警报

def testArticleDekExternalLinksTest(self):
        """Practitest id :305"""
        addArticlePage = AP.AddArticlePage(self.driver,"m.php?t=articles") 
        addArticlePage.getRandomEditorialArticle()
        keys = "https://www.google.com/?gws_rd=ssl"
        addArticlePage.clickDekExternalLinks()

        WebDriverWait(self.driver, 10).until(EC.alert_is_present())
        alert = self.driver.switch_to.alert
        print alert
        alert.send_keys(keys)
        alert.accept()
        self.assertTrue(addArticlePage.save(), "cannot save an Article")
        self.driver.refresh()
        addArticlePage.clickHtmlView(0)
        time.sleep(2)
        assert keys in addArticlePage.getDekContentUrlStripped()

        addArticlePage.loadUrl(addArticlePage.getPreviewUrl())
        articlePage = ArticlePage.ArticlePage(self.driver)

另一个相关的thread

JS AlertBox抛出JavaScript错误：“e为null

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