Webdriver error: "No alert is present" after UnexpectedAlertPresentException is thrown
python, selenium, selenium-webdriver, webdriver
Solution
I think Selenium closes unexpected alerts. Apparently you can change how the firefox driver treats unexpected alerts: How to handle an Alert with "UnexpectedAlertBehaviour" capability in Selenium?
As an alternative, you could check if there is an alert before acting (after all, if you want handle the alert it's not unexpected) like so (Java):
try {
Alert alert = _driver.switchTo().alert();
//do stuff with alert
} catch (final NoAlertPresentException e) {
//do non-alert stuff
}
Problem
I'm trying to test a webapp I'm developing. I'm using the Firefox driver against Firefox 22.0. At one point, a modal dialog may pop up (a Javascript prompt()). If it does, I want to enter some text and then dismiss it (click OK). Here's the relevant code: ``` try: if button.text == "Run": button.click() except UnexpectedAlertPresentException: alert = self.driver.switch_to_alert() print alert.text alert.send_keys('8080') alert.dismiss() ``` The `UnexpectedAlertPresentException` is being thrown. However, as soon as it tries to execute `print alert.text`, I get: ``` `NoAlertPresentException: Message: u'No alert is present'`. ``` If I remove the print statement, it blows up at `alert.send_keys` with: ``` `WebDriverException: Message: u'fxdriver.modals.find_(...) is null'` ``` I don't get it. Isn't the `NoAlertPresentException` by definition contradicting the `UnexpectedAlertPresentException` that was thrown and caused the except block to be executed in the first place? Edit: Also, I can't for the life of me find any documentation on the `UnexpectedAlertPresentException` in http://selenium.googlecode.com/svn/trunk/docs/api/py/index.html#documentation Edit 2: This is what I have now: ``` try: if button.text == "Run": button.click() alert = self.driver.switch_to_alert() alert.send_keys('1111') alert.dismiss() except NoAlertPresentException: pass ``` However, I'm still seeing this: ``` WebDriverException: Message: u'fxdriver.modals.find_(...) is null' ``` on the line `alert.send_keys('8080')`. I guess I don't understand why `switch_to_alert()` doesn't throw `NoAlertPresent` if there isn't an alert...which is what I'm assuming the `WebDriverException` is indicating.