问题:

I am using a Chrome Driver and trying to test a webpage.

Normally it runs fine but some time I gets exceptions--

 org.openqa.selenium.UnhandledAlertException: unexpected alert open  (Session info: chrome=38.0.2125.111)  (Driver info: chromedriver=2.9.248315,platform=Windows NT 6.1 x86) (WARNING: The server did not  provide any stacktrace information)  Command duration or timeout: 16 milliseconds: null  Build info: version: '2.42.2', revision: '6a6995d', time: '2014-06-03 17:42:30'  System info: host: 'Casper-PC', ip: '10.0.0.4', os.name: 'Windows 7', os.arch: 'x86', os.version:  '6.1', java.version: '1.8.0_25'  Driver info: org.openqa.selenium.chrome.ChromeDriver

Then i tried to handle the alert --

  Alert alt = driver.switchTo().alert();   alt.accept();

But this time i recived-- org.openqa.selenium.NoAlertPresentException

I am attaching the screen shots of the alert-

I am not able to figure out what to do now. The problem is i am not receiving this exception always. And when it occurs then the test fails.

回答1:

I had this problem too. It was due to the default behaviour of the driver when it encounters an alert. The default behaviour was set to "ACCEPT", thus the alert was closed automatically, and the switchTo().alert() couldn't find it.

The solution is to modify the default behaviour of the driver ("IGNORE"), so that it doesn't close the alert:

DesiredCapabilities dc = new DesiredCapabilities(); dc.setCapability(CapabilityType.UNEXPECTED_ALERT_BEHAVIOUR, UnexpectedAlertBehaviour.IGNORE); d = new FirefoxDriver(dc);

Then you can handle it:

try {     click(myButton); } catch (UnhandledAlertException f) {     try {         Alert alert = driver.switchTo().alert();         String alertText = alert.getText();         System.out.println("Alert data: " + alertText);         alert.accept();     } catch (NoAlertPresentException e) {         e.printStackTrace();     } }

回答2:

You can use Wait functionality in Selenium WebDriver to wait for an alert, and accept it once it is available.

In C# -

public static void HandleAlert(IWebDriver driver, WebDriverWait wait) {     if (wait == null)     {         wait = new WebDriverWait(driver, TimeSpan.FromSeconds(5));     }      try     {         IAlert alert = wait.Until(drv => {             try             {                 return drv.SwitchTo().Alert();             }             catch (NoAlertPresentException)             {                 return null;             }         });         alert.Accept();     }     catch (WebDriverTimeoutException) { /* Ignore */ } }

Its equivalent in Java -

public static void HandleAlert(WebDriver driver, WebDriverWait wait) {     if (wait == null) {         wait = new WebDriverWait(driver, 5);     }      try {         Alert alert = wait.Until(new ExpectedCondition{             return new ExpectedCondition() {               @Override               public Alert apply(WebDriver driver) {                 try {                   return driver.switchTo().alert();                 } catch (NoAlertPresentException e) {                   return null;                 }               }             }         });         alert.Accept();     } catch (WebDriverTimeoutException) { /* Ignore */ } }

It will wait for 5 seconds until an alert is present, you can catch the exception and deal with it, if the expected alert is not available.

回答3:

Is your switch to alert within a try/catch block? You may also want to add a wait timeout to see if the alert shows up after a certain delay

try {     // Add a wait timeout before this statement to make      // sure you are not checking for the alert too soon.     Alert alt = driver.switchTo().alert();     alt.accept(); } catch(NoAlertPresentException noe) {     // No alert found on page, proceed with test. }

回答4:

You can try this snippet:

public void acceptAlertIfAvailable(long timeout)       {         long waitForAlert= System.currentTimeMillis() + timeout;         boolean boolFound = false;         do         {           try           {             Alert alert = this.driver.switchTo().alert();             if (alert != null)             {               alert.accept();               boolFound = true;             }           }           catch (NoAlertPresentException ex) {}         } while ((System.currentTimeMillis()

回答5:

After click event add this below code to handle

    try{          driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);        }  catch (org.openqa.selenium.UnhandledAlertException e) {                          Alert alert = driver.switchTo().alert();           String alertText = alert.getText().trim();          System.out.println("Alert data: "+ alertText);          alert.dismiss();}

... do other things driver.close();

回答6:

Following is working for me

    private void acceptSecurityAlert() {      Wait wait = new FluentWait(driver).withTimeout(10, TimeUnit.SECONDS)                                                                       .pollingEvery(3, TimeUnit.SECONDS)                                                                       .ignoring(NoSuchElementException.class);         Alert alert = wait.until(new Function() {                 public Alert apply(WebDriver driver) {              try {                  return driver.switchTo().alert();              } catch(NoAlertPresentException e) {                  return null;             }         }       });      alert.accept(); }

转载请标明出处:org.openqa.selenium.UnhandledAlertException: unexpected alert open

文章来源: org.openqa.selenium.UnhandledAlertException: unexpected alert open

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