Selenium WebDriver如何解决陈旧元素引用异常？

Z时代
2024-01-10
分类：问答

我在Selenium 2 Web驱动程序测试中具有以下代码，该代码在调试时有效，但是在构建中运行它时，大多数情况下会失败。我知道这一定与未刷新页面的方式有关，但不知道如何解决它，因此，任何有关我做错事情的指针都应该受到赞赏。我正在使用JSF primefaces作为我的Web应用程序框架。当我单击添加新链接时，会出现一个弹出对话框，其中包含一个输入框，我可以在其中输入日期，然后单击“保存”。在获取输入元素以输入文本的过程中，我得到了一个陈旧的元素ref异常。

提前致谢

import static org.junit.Assert.assertEquals;
 import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.junit.Test;
import org.openqa.selenium.By;
import org.openqa.selenium.StaleElementReferenceException;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.support.ui.ExpectedCondition;
import org.openqa.selenium.support.ui.WebDriverWait;
public class EnterActiveSubmissionIntegrationTest {
Map<String, Map<String, String>> tableData = new HashMap<String, Map<String, String>>();
@Test
public void testEnterActiveSubmission() throws Exception {
    // Create a new instance of the Firefox driver
    // Notice that the remainder of the code relies on the interface, 
    // not the implementation.
    System.setProperty("webdriver.chrome.driver", "C:/apps/chromedriver.exe");
    WebDriver driver = new ChromeDriver();
    // And now use this to visit Google
    driver.get("http://localhost:8080/strfingerprinting");
    // Alternatively the same thing can be done like this
    // driver.navigate().to("http://www.google.com");
    // Find the text input element by its name
    WebElement element = driver.findElement(By.linkText("Manage Submissions"));
    element.click();
    parseTableData(driver, "form:submissionDataTable_data", 1);
    assertEquals(tableData.get("form:submissionDataTable_data").get("12"), "Archived");
    WebElement newElement = driver.findElement(By.linkText("Add new"));
    newElement.click();
    WebDriverWait wait = new WebDriverWait(driver,10);
    wait.until(new ExpectedCondition<Boolean>() {
        public Boolean apply(WebDriver driver) {
            WebElement button = driver.findElement(By
                    .name("createForm:dateInput_input"));
            if (button.isDisplayed())
                return true;
            else
                return false;
        }
    });
    WebElement textElement = driver.findElement(By.name("createForm:dateInput_input"));
    textElement.sendKeys("24/04/2013");
    WebElement saveElement = driver.findElement(By.name("createForm:saveButton"));
    saveElement.click();
    driver.navigate().refresh();
    parseTableData(driver, "form:submissionDataTable_data", 2);
    //Close the browser
    driver.quit();
}
private void parseTableData(WebDriver driver, String id, int expectedRows) {
    // Check the title of the page or expected element on page
    WebElement subTableElement = driver.findElement(By.id(id));
    List<WebElement> tr_collection=subTableElement.findElements(By.xpath("id('"+ id + "')/tr"));
    assertEquals("incorrect number of rows returned", expectedRows, tr_collection.size());
    int row_num,col_num;
    row_num=1;
    if(tableData.get(id) == null) {
        tableData.put(id, new HashMap<String, String>());
    }
    Map<String, String> subTable = tableData.get(id);
    for(WebElement trElement : tr_collection)
    {
        List<WebElement> td_collection=trElement.findElements(By.xpath("td"));
        col_num=1;
        for(WebElement tdElement : td_collection)
        {
            subTable.put(row_num + "" + col_num, tdElement.getText());
            col_num++;
        }
        row_num++;
    }
}
}

运行此命令时，出现以下异常，但可能会在

WebElement textElement = driver.findElement(By.name("createForm:dateInput_input"));

要么

if (button.isDisplayed())

异常跟踪

org.openqa.selenium.StaleElementReferenceException: stale element reference: element is not attached to the page document (Session info: chrome=26.0.1410.64) (Driver info: chromedriver=0.8,platform=Windows NT 6.0 SP2 x86) (WARNING: The server did not provide any stacktrace information) Command duration or timeout: 56 milliseconds For documentation on this error, please visit: http://seleniumhq.org/exceptions/stale_element_reference.html Build info: version: '2.32.0', revision: '6c40c187d01409a5dc3b7f8251859150c8af0bcb', time: '2013-04-09 10:39:28' System info: os.name: 'Windows Vista', os.arch: 'x86', os.version: '6.0', java.version: '1.6.0_10' Session ID: 784c53b99ad83c44d089fd04e9a42904 Driver info: org.openqa.selenium.chrome.ChromeDriver Capabilities [{platform=XP, acceptSslCerts=true, javascriptEnabled=true, browserName=chrome, rotatable=false, driverVersion=0.8, locationContextEnabled=true, version=26.0.1410.64, cssSelectorsEnabled=true, databaseEnabled=true, handlesAlerts=true, browserConnectionEnabled=false, nativeEvents=true, webStorageEnabled=true, applicationCacheEnabled=false, takesScreenshot=true}] at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:187) at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:145) at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:554) at org.openqa.selenium.remote.RemoteWebElement.execute(RemoteWebElement.java:268) at org.openqa.selenium.remote.RemoteWebElement.isDisplayed(RemoteWebElement.java:320) at com.integration.web.EnterActiveSubmissionIntegrationTest$1.apply(EnterActiveSubmissionIntegrationTest.java:58) at com.integration.web.EnterActiveSubmissionIntegrationTest$1.apply(EnterActiveSubmissionIntegrationTest.java:1) at org.openqa.selenium.support.ui.FluentWait.until(FluentWait.java:208) at com.integration.web.EnterActiveSubmissionIntegrationTest.testEnterActiveSubmission(EnterActiveSubmissionIntegrationTest.java:53) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)