如何使用Selenium Webdriver正確查找網頁的元素？

Question

我與Facebook練習，

WebDriver driver = new HtmlUnitDriver(); 


driver.get("http://www.facebook.com"); 

成功logining後，我嘗試發送郵件。但我找不到消息區域：

WebElement selectMessages = driver.findElement(By.id("fbMessagesFlyout")); 
     selectMessages.click(); 


     WebElement elementMess = driver.findElement(By.id("q")); 
     elementMess.sendKeys("Dalia"); 
     elementMess.submit(); 

此代碼只在頭部配置了帶有消息的JavaScript，然後在fb頭部也發送搜索請求。 如何才能找到正確的鏈接到dialig頁面，然後找到文本詠歎調？

Answer 1

這工作！

@BeforeTest 
public void setUp() throws Exception { 
    driver = new FirefoxDriver(); 
    baseUrl = "https://www.facebook.com"; 
    driver.manage().timeouts().implicitlyWait(5, TimeUnit.SECONDS); 
} 

@Test 
public void testUntitled() throws Exception { 
    driver.get(baseUrl + "/login.php"); 
    driver.findElement(By.id("email")).sendKeys("youridhere@gmail.com"); 
    driver.findElement(By.id("pass")).sendKeys("yourpassword"); 
    driver.findElement(By.name("login")).click(); 
    Thread.sleep(3000); 
    WebElement msgframe = driver.findElement(By.id("fbMessagesJewel")); 
    msgframe.findElement(By.tagName("a")).click(); 
    List<WebElement> element = driver.findElements(By 
      .className("messagesContent")); 
    element.get(0).click(); 
    WebElement chat = driver.findElement(By.className("fbNubFlyoutFooter")); 
    chat.findElement(By.tagName("textarea")).sendKeys("Hi"); 
    driver.findElement(By.tagName("textarea")).sendKeys(Keys.RETURN); 
    Thread.sleep(2000); 
}