Managing Alert and Confirmation Pop-ups Using JavascriptExecutor in Selenium with GhostDriver

In my current project, I am facing a challenge. I am utilizing Selenium 2.42.2 along with the phantomjsDriver 1.1.0 in Eclipse using Java. It is crucial for my test to be able to identify and save messages from Alerts, Confirms, and possibly Prompts when a Page is opened. Unfortunately, the phantomjsDriver does not have this capability yet, so I am in need of a workaround involving the JavascriptExecutor. However, I am not very experienced in JavaScript and find it difficult to solve this issue on my own. Here is the code I have tried so far: 

DesiredCapabilities dcaps = new DesiredCapabilities();
String[] phantomArgs = new  String[] {
        "--webdriver-loglevel=NONE"};
dcaps.setCapability(CapabilityType.ACCEPT_SSL_CERTS, true);
dcaps.setCapability(CapabilityType.SUPPORTS_ALERTS, true);
dcaps.setCapability(PhantomJSDriverService.PHANTOMJS_EXECUTABLE_PATH_PROPERTY, 
        phantomjs.getAbsolutePath());
dcaps.setCapability(PhantomJSDriverService.PHANTOMJS_CLI_ARGS, phantomArgs);
dcaps.setJavascriptEnabled(true);
WebDriver driver = new PhantomJSDriver(dcaps);

JavascriptExecutor js=(JavascriptExecutor) driver;
String script = "window.confirm = function(message) {"+
        "document.lastConfirmationMessage = message; return true; }";
js.executeScript(script);
driver.get("http://www.mysiteWithConfirm.de"); 
Object message = js.executeScript("return document.lastConfirmationMessage");

Upon opening my site, a Confirm prompt is immediately displayed indicating that there is a Confirm dialog. However, I am only receiving exceptions

Error Message => 'Can't find variable: lastConfirmationMessage'

javajavascriptselenium-webdriverphantomjsghostdriver

Answer №1

It seems like the approach you're taking to solve this issue may not work. The PhantomJDrvier (GhostDriver) API currently does not have support for alert handling (you can check the open issue on GitHub here).

One possible solution could be to modify the window.alert function so that it logs messages to the console instead. By using the ALERT label, you can easily identify these alert messages in the console among other logs.

page.evaluate(function() {
    window.alert = function(str) {
        console.log("ALERT:" + str);
    }
});

page.onConsoleMessage(function(message, lineNumber, sourceId) {
    if(/^ALERT:/.test(message)) {
       //do something with message
    }
});

I based my response on this discussion.

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