【Selenium】显示、隐式等待

显示等待

WebDriverWait

超时抛出TimeOutException，默认500毫秒

public class WaitToReturnElement {

   /*
   * 设置超时时间为5秒，返回指定xpath的WebElement
   * */
   public static WebElement waitForByXpath(final WebDriver driver,final String xpath) {
      WebDriverWait wait = new WebDriverWait(driver, 5);
      return wait.until(new ExpectedCondition<WebElement>() {
         
         public WebElement apply(WebDriver arg0) {
            return driver.findElement(By.xpath(xpath));
         }
         
      });
   }

   /*
   * 设置超时时间为10秒，返回指定id的WebElement
   * */
   public static WebElement waitForById(final WebDriver driver,final String id) {
      WebDriverWait wait = new WebDriverWait(driver, 10);
      return wait.until(new ExpectedCondition<WebElement>() {
         
         public WebElement apply(WebDriver arg0) {
            return driver.findElement(By.id(id));
         }
         
      });
   }
   
   /*
   * 设置超时时间为10秒，返回指定xpath的WebElement是否出现
   * */
   public static Boolean isElementDisplayed(final WebDriver driver,final String xpath) {
      WebDriverWait wait = new WebDriverWait(driver, 10);
      return wait.until(new ExpectedCondition<Boolean>() {
         
         public Boolean apply(WebDriver arg0) {
            return driver.findElement(By.xpath(xpath)).isDisplayed();
         }        
      });
   }
   
}

ExpectedCondition

等待元素直到可点击状态
WebDriverWait wait=new WebDriverWait(driver,10);
wait.until(ExpectedConditions.elementToBeClickable(By.xpath("")));

隐式等待

查找WebDriver无法使用的元素时等待，默认0，生命周期整个WebDriver

driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);