如何使用selenium.WebDriver和HtmlUnitDriver登出Facebook

Question

我使用selenium.WebDriver和HtmlUnitDriver登录到Facebook，但我无法注销。

public static void main(String[] args) throws InterruptedException { 

WebDriver driver = new HtmlUnitDriver(); 
driver.get("http://www.facebook.com"); 
System.out.println("Title of the page "+ driver.getTitle()); 
WebElement username = driver.findElement(By.id("email")); 
username.sendKeys("[email protected]"); 
WebElement password = driver.findElement(By.id("pass")); 
password.sendKeys("xxxxx"); 
WebElement Signup_button = driver.findElement(By.id("loginbutton")); 
Signup_button.click(); 
Thread.sleep(5000); 
System.out.println("After login title is = " + driver.getTitle()); 

到现在为止它的工作原理。和下面的步骤覆盖注销部分（不工作）：

WebElement logOut = driver.findElement(By.id("userNavigationLabel")); 
logOut.click(); 
Thread.sleep(5000); 
WebElement signOut = driver.findElement(By.name("Log Out")); 
logOut.click(); 

System.out.println("Logged Out Successfully!!!!!!!!!!!!!!!!!!!"); 
String pagetitle = driver.getTitle(); 
System.out.println(pagetitle); 

}} 

错误：

Exception in thread "main" org.openqa.selenium.NoSuchElementException: Unable to locate element with name: Log Out 

Facebook的注销HTML代码

<span><span class="_54nh"><form class="_w0d" 
action="https://www.facebook.com/logout.php" data-nocookies="1" 
id="show_me_how_logout_1" method="post" onsubmit="return window.Event 
&amp;&amp; Event.__inlineSubmit &amp;&amp; 
Event.__inlineSubmit(this,event)"><input name="fb_dtsg" 
value="AQGzvtPjFD1W:AQFslBEMcQG9" autocomplete="off" type="hidden"><input 
autocomplete="off" name="ref" value="mb" type="hidden"><input 
autocomplete="off" name="h" value="AfeziZXPRhN6ncxD" type="hidden"> 
</form>Log Out</span></span> 

我也通过SAURABH野牛Selenium WebDriver Log Out from Facebook尝试这个代码

WebDriverWait wait = new WebDriverWait(driver, 10); 
WebElement accountSettings = wait.until(ExpectedConditions.elementToBeClickable(By.linkText("Account Settings"))); 
accountSettings.click() //this will click on setting link to open menu 
WebElement logOut = wait.until(ExpectedConditions.elementToBeClickable(By.linkText("Log Out"))); 
logOut.click() // this will click on logout link 

错误

Exception in thread "main" org.openqa.selenium.TimeoutException: Timed out after 10 seconds waiting for element to be clickable: By.linkText: Log Out 
Build info: version: '2.42.2', revision: '6a6995d', time: '2014-06-03 17:42:03' 
System info: xxxxxxxxxxx java.version: '1.8.0_101' 
Driver info: driver.version: unknown 
    at org.openqa.selenium.support.ui.FluentWait.timeoutException(FluentWait.java:259) 
    at org.openqa.selenium.support.ui.FluentWait.until(FluentWait.java:228) 
    at HtmlDemoProgram1.main(HtmlDemoProgram1.java:53) 
Caused by: org.openqa.selenium.NoSuchElementException: No link found with text: Log Out 
For documentation on this error, please visit: http://seleniumhq.org/exceptions/no_such_element.html 

Answer 1

中有名称（定位器）无属性，请使用另一个属性（定位器）为ID =“show_me_how_logout_1”或任何其他定位器。

Answer 2

请尝试下面的代码。

WebElement logOut = driver.findElement(By.id("userNavigationLabel")); 
logOut.click(); 
Thread.sleep(5000); 
WebElement signOut = driver.findElement(By.partialLinktext("Log Out")); 
signOut.click(); 

Answer 3

下面的代码可能会帮助你....谢谢。

package open_website;

import java.util.concurrent.TimeUnit; 
import org.openqa.selenium.WebDriver; 
import org.openqa.selenium.WebElement; 
import org.openqa.selenium.By; 
import org.openqa.selenium.chrome.ChromeDriver; 

    public class Open_website_1 
    { 

    public static void main(String[] args) { 
    // TODO Auto-generated method stub 

    String expath = "D:\\Eclipse\\chromedriver_win32\\chromedriver.exe"; 

    System.setProperty("webdriver.chrome.driver", "D:\\Eclipse\\chromedriver_win32\\chromedriver.exe"); 

    WebDriver driver = new ChromeDriver(); 

    driver.get("http:\\www.facebook.com"); 
    WebElement element1 = driver.findElement(By.id("email")); 
    element1.sendKeys("[email protected]"); 

    WebElement element2 = driver.findElement(By.id("pass")); 
    element2.sendKeys("pa$$word123"); 

    WebElement element3 = driver.findElement(By.id("u_0_q")); 
    element3.click(); 

    System.out.println("Login"); 

    WebElement lstitem=driver.findElement(By.id("userNavigationLabel")); 
    lstitem.click(); 

    driver.manage().timeouts().implicitlyWait(60,TimeUnit.SECONDS); 

    driver.findElement(By.partialLinkText("Log Out")).click(); 

    System.out.println("Log out"); 


} 

}