硒 NoSuchElementException

Question

我收到以下错误。

Exception in thread "main" org.openqa.selenium.NoSuchElementException: no such element
 (Session info: chrome=39.0.2171.95)

从错误消息的外观来看，它说找不到这样的元素。所以我添加了等待元素出现的时间。有趣的是，错误发生在 driver.findElement 行，这意味着等待能够找到元素。

问题显然是为什么硒找不到元素。

起初我以为是因为在字符串中使用了一个变量

driver.findElement(By.id("_ctl0_ContentPlaceHolder1_eoiSectionSummary_individualRepeater__ctl0_sectionRepeater__ct" + i + "_isCompleteLabel")).getText();

所以我尝试将字符串存储在某处，然后使用它查找元素。正如您在下面的代码中看到的，我尝试使用 print 来验证该字符串是否与网络中的字符串相同。他们确实匹配。

我现在没主意了。请帮忙。如果您需要任何其他信息，请告诉我

public int verifyCompletion() {

    wait.until(ExpectedConditions.visibilityOfElementLocated(By.id("_ctl0_ContentPlaceHolder1_eoiSectionSummary_individualRepeater__ctl0_sectionRepeater__ctl0_isCompleteLabel")));
    int uncompletedCounter = 0;

    for (int i = 10; i < 20; i++) {
        String text  = "_ctl0_ContentPlaceHolder1_eoiSectionSummary_individualRepeater__ctl0_sectionRepeater__ct" + i + "_isCompleteLabel";
         driver.findElement(By.id(text)).getText();

        System.out.println(text);

        boolean sectionCompleted =text.equalsIgnoreCase("Yes");
        if (!sectionCompleted) {
            uncompletedCounter++;
        }

    }
    return uncompletedCounter;


}

Answer 1

我发现您的选择器中有一个小错误。您没有正确参数化选择器。不过，我不确定这是否是处理这种情况的一种非常有效的方法。

String selector  = "_ctl" + i + "_ContentPlaceHolder1_eoiSectionSummary_individualRepeater__ctl" + i + "_sectionRepeater__ctl" + i + "_isCompleteLabel";

编辑：更精确的代码应如下所示：

public int verifyCompletion() {
    int uncompletedCounter = 0;

    for (int i = 0; i < 10; i++) {
        String selector  = "_ctl" + i + "_ContentPlaceHolder1_eoiSectionSummary_individualRepeater__ctl" + i + "_sectionRepeater__ctl" + i + "_isCompleteLabel";
        (new WebDriverWait(driver, 10)).until(ExpectedConditions.presenceOfElementLocated(By.id(selector)));
        String elementText = driver.findElement(By.id(selector)).getText();

        System.out.println(selector);
        System.out.println(elementText);

        boolean sectionCompleted =text.equalsIgnoreCase("Yes");
        if (!sectionCompleted) {
            uncompletedCounter++;
        }
    }
    return uncompletedCounter;
}

硒 NoSuchElementException

Selenium NoSuchElementException

java

selenium