Webdriver等待不抛出超时异常

Question

您好，我正在尝试在硒测试中使用 webdriver。我想检查它是如何工作的。我给了 5 秒作为 webdriver 等待的最长时间。我的页面加载时间超过 7 秒，但我仍然没有从 webdriver 等待中得到任何超时异常。我也在给我的控制台输出。请告诉我为什么我没有收到超时异常？

public class MainClass {

private static ChromeDriver driver;


public static void main(String[] args) {



            executeTest();

}

private static void executeTest( )  {

    // TODO Auto-generated method stub
    System.setProperty("webdriver.chrome.driver", "C:\\chromedriver.exe");

    driver = new ChromeDriver();
    // driver.manage().timeouts().pageLoadTimeout(40, TimeUnit.SECONDS);

    driver.get("http://myUrl");

    Long loadtime = (Long) ((JavascriptExecutor) driver)
            .executeScript("return performance.timing.loadEventEnd - performance.timing.navigationStart;");

    System.out.println("loadding time " + Loadtime);

    WebDriverWait wait = new WebDriverWait(driver, 5);

    Boolean sign_in = wait.until(ExpectedConditions.visibilityOfElementLocated(By.id("signinbutton")))
            .isDisplayed();

    if (sign_in == true) {
        driver.findElement(By.id("signinbutton")).click();
    } else {
        System.out.println("Oops! Couldn't locate sign_in element!");
    }

    Boolean user_name = wait.until(ExpectedConditions.visibilityOfElementLocated(By.id("username_id")))
            .isDisplayed();
    // user_name.sendKeys("ANAND@RIL");
    if (user_name == true) {
        driver.findElement(By.id("username_id")).sendKeys("ANAND@RIL");
    } else {
        System.out.println("Oops! Couldn't locate user_name element!");
    }

    Boolean password = wait.until(ExpectedConditions.visibilityOfElementLocated(By.id("password_id")))
            .isDisplayed();

    if (password == true) {
        driver.findElement(By.id("password_id")).sendKeys("ANAND");
    } else {
        System.out.println("Oops! Couldn't locate password element!");
    }

    WebElement login = 
    wait.until(ExpectedConditions.elementToBeClickable(By.id("textButton")));
    login.click();

}
}

控制台输出：

尝试 1：

Starting ChromeDriver 2.36.540470 (e522d04694c7ebea4ba8821272dbef4f9b818c91) on port 42020
Only local connections are allowed.
Apr 18, 2018 12:07:35 PM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Detected dialect: OSS
**Loading time 7872**

尝试 2：

Starting ChromeDriver 2.36.540470 (e522d04694c7ebea4ba8821272dbef4f9b818c91) on port 38325
Only local connections are allowed.
Apr 18, 2018 12:07:46 PM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Detected dialect: OSS
**Loadding time 6632**

尝试 3：

Starting ChromeDriver 2.36.540470 (e522d04694c7ebea4ba8821272dbef4f9b818c91) on port 34619
Only local connections are allowed.
Apr 18, 2018 12:07:55 PM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Detected dialect: OSS
**Loadding time 7522**

尝试 4：

Starting ChromeDriver 2.36.540470 (e522d04694c7ebea4ba8821272dbef4f9b818c91) on port 48000
Only local connections are allowed.
Apr 18, 2018 12:08:05 PM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Detected dialect: OSS

Answer 1

我已经用 try-catch 修改了方法。请尝试以下方法：

public static void main(String[] args) throws Exception {
try{
    executeTest();
    } catch (Exception e) {
        System.out.println(e);
        throw e;
    }
}
private static void executeTest( ) throws Exception {
try{

    // TODO Auto-generated method stub
    System.setProperty("webdriver.chrome.driver", "C:\\chromedriver.exe");

    driver = new ChromeDriver();
    // driver.manage().timeouts().pageLoadTimeout(40, TimeUnit.SECONDS);

    WebDriverWait wait = new WebDriverWait(driver, 5);

    driver.get("http://myUrl");

    Boolean sign_in = wait.until(ExpectedConditions.visibilityOfElementLocated(By.id("signinbutton")))
            .isDisplayed();

    Long loadtime = (Long) ((JavascriptExecutor) driver)
            .executeScript("return performance.timing.loadEventEnd - performance.timing.navigationStart;");

    System.out.println("loadding time " + Loadtime);

    if (sign_in == true) {
        driver.findElement(By.id("signinbutton")).click();
    } else {
        System.out.println("Oops! Couldn't locate sign_in element!");
    }

    Boolean user_name = wait.until(ExpectedConditions.visibilityOfElementLocated(By.id("username_id")))
            .isDisplayed();
    // user_name.sendKeys("ANAND@RIL");
    if (user_name == true) {
        driver.findElement(By.id("username_id")).sendKeys("ANAND@RIL");
    } else {
        System.out.println("Oops! Couldn't locate user_name element!");
    }

    Boolean password = wait.until(ExpectedConditions.visibilityOfElementLocated(By.id("password_id")))
            .isDisplayed();

    if (password == true) {
        driver.findElement(By.id("password_id")).sendKeys("ANAND");
    } else {
        System.out.println("Oops! Couldn't locate password element!");
    }

    WebElement login = 
    wait.until(ExpectedConditions.elementToBeClickable(By.id("textButton")));
    login.click();
    }
    catch(Exception e) {
        System.out.println(e);
        throw e;
    }
}

Answer 2

您需要考虑以下几个事实：

• pageLoadTimeout() : pageLoadTimeout() 设置在引发异常/错误之前等待页面加载完全的时间。如果超时为负数，则页面加载可能是无限期的。

  在您的代码中，您已将 pageLoadTimeout() 配置为 40 秒。根据日志，您的页面加载时间为 7872 ms、6632 ms 和 7522 ms，因此您看不到异常/错误。

  如果您不配置pageLoadTimeout()，根据GeckoDriver的当前实现，考虑默认值"pageLoad":300000。

  您可以在pageLoadTimeout in Selenium not working中找到关于pageLoadTimeout()的详细讨论

• WebDriverWait() : WebDriverWait() 是 FluentWait 的特化，它使用 WebDriver 实例并与 ExpectedConditions 类结合使用，该类被定义为等待特定条件发生，然后再继续代码。

  在您的代码中，您已将 WebDriverWait 配置为 5 秒，这适用于您用作的所有 ExpectedConditions：

   wait.until(ExpectedConditions.visibilityOfElementLocated(By.id("signinbutton")));
   wait.until(ExpectedConditions.visibilityOfElementLocated(By.id("username_id")));
   wait.until(ExpectedConditions.visibilityOfElementLocated(By.id("password_id")));
   wait.until(ExpectedConditions.elementToBeClickable(By.id("textButton")));
  

  所有ExpectedConditions都在5秒的时间跨度内实现。所以你也看不到任何异常/错误。

  您可以在Replace implicit wait with explicit wait (selenium webdriver & java)

  找到关于 WebDriverWait / ExplicitWait 的详细讨论