javascript - JS AlertBox 抛出 JavaScript 错误 : "e is null

Question

我的 JS 警报框出现问题，它应该可以正常工作，但突然弹出了。

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}] ... 

不知道大家能不能帮帮我。它是 python selenium 代码，浏览器是 Firefox 32 到 34。

我的代码位于

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，即使添加计时也无济于事，最奇怪的部分是它之前工作但现在不工作.. Selenium 版本是 2.45.0

Answer 1

好的。对我来说这似乎是一个等待问题。试试 explicit wait并在存在时发出警报

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thread