Transform IAlert into an Observer role

Question

Transform IAlert into an Observer role

While using Selenium, I have encountered some websites with random popup messages that disrupt the testing process.

I think implementing an Observer pattern using IAlert to catch and handle these alerts could be a solution. The idea is to accept the alert and continue the test from where it was interrupted due to the popup.

This is how the IAlert code might look:

try
{
    IAlert alert = driver.SwitchTo().Alert();
    if (alert != null)
    {
        alert.Accept();
    }
}
catch (Exception ex)
{}

The main question now is how to effectively implement this solution, or if there are better ways to handle random popups during testing.

Thank you.

c#.net selenium design-patterns

Answer 1

Answer №1

To handle popups efficiently while performing other tasks, I recommend using the EventFiringWebDriver approach. This allows you to customize code that will be executed before or after specific events. For a practical example, check out this snippet here.

Although it's been a while since I've worked on .Net projects and my C# skills are a bit rusty, the general structure would resemble something like this:

IWebDriver driver = new FirefoxDriver();
EventFiringWebDriver eventDriver = new EventFiringWebDriver(driver);
// Define relevant events here, such as pre-click actions:
eventDriver.ElementClicking = new EventHandler<FindElementEventArgs>(checkPopup);
driver = eventDriver; // Use EventFiringWebDriver instead

Next, create the handler function:

static void checkPopup(object sender, OpenQA.Selenium.Support.Events.WebElementEventArgs e) {
     EventFiringWebDriver driver = (sender as OpenQA.Selenium.Support.Events.EventFiringWebDriver);
     try {
         Alert alert = driver.SwitchTo().Alert();
         alert.accept();
     }
     catch (NoAlertPresentException ex) { 
         // No action needed, proceed as usual
     }
}

With this setup, every time a script attempts to click on an element, it will first check for any popups and handle them accordingly.

Answer 2

To handle popups efficiently while performing other tasks, I recommend using the EventFiringWebDriver approach. This allows you to customize code that will be executed before or after specific events. For a practical example, check out this snippet here.

Although it's been a while since I've worked on .Net projects and my C# skills are a bit rusty, the general structure would resemble something like this:

IWebDriver driver = new FirefoxDriver();
EventFiringWebDriver eventDriver = new EventFiringWebDriver(driver);
// Define relevant events here, such as pre-click actions:
eventDriver.ElementClicking = new EventHandler<FindElementEventArgs>(checkPopup);
driver = eventDriver; // Use EventFiringWebDriver instead

Next, create the handler function:

static void checkPopup(object sender, OpenQA.Selenium.Support.Events.WebElementEventArgs e) {
     EventFiringWebDriver driver = (sender as OpenQA.Selenium.Support.Events.EventFiringWebDriver);
     try {
         Alert alert = driver.SwitchTo().Alert();
         alert.accept();
     }
     catch (NoAlertPresentException ex) { 
         // No action needed, proceed as usual
     }
}

With this setup, every time a script attempts to click on an element, it will first check for any popups and handle them accordingly.

Transform IAlert into an Observer role

Answer №1

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