问题
My automation test software for a web application runs on IE, Firefox, Chrome and Safari, and is written using C# and Selenium WebDriver (IE, Firefox, Chrome), Selenium RC (Safari).
A new error occurred when I upgraded to version 2.18.0 today. I am seeing the following exception:
System.InvalidOperationException: Modal dialog present (UnexpectedAlertOpen)
I saw this exception beingn thrown for IE, Firefox and Safari so far.
I looked up the release documentation and did not find anything that suggests that I should do differently to accept or cancel on alerts.
Is this a bug, or is there a new procedure to follow pertaining to alerts?
回答1:
I had the same problem on my ccnet build server with Firefox since last update and I found that I need a update of my java version because of a security issue.
After the update all my test succeed and I had no more this error "System.InvalidOperationException: Modal dialog present (UnexpectedAlertOpen)".
来源：https://stackoverflow.com/questions/9084920/alert-handling-selenium-webdriver-selenium-rc-2-18-0-exception