how to handle unexpected 'alert' in selenium webdriver - selenium-webdriver

Question

PS: driver.switchTo().alert().accept(); is not working
Well , I want to automate testing of webpage which shows random alerts*
*random alerts :JavaScript Alert which are not controlled and can appear any time
so I dont know where to put driver.switchTo().alert().accept()because the occurrence of alert is not known in advance.
So kindly help me.. Here is simple mocha selenium test... I have commented out the alert.accept() part..
I want to know how to handle
UnexpectedAlertOpenError: unexpected alert open: {Alert text :}
once in for all....
I read the selenium docs but couldn't find any...
here is my code
describe( 'handling alerts' , function(done){
after(function(done){
return driver.quit();
done();
});
it( 'should check title ', function(done){
driver.get("https://www.google.in");
driver.findElement(By.id("q"));
driver.get("https://jsfiddle.net/cwthh0y7/");
// driver.switchTo().alert().accept();
driver.getTitle().then(function(title){
assert.equal(title, "Edit fiddle - JSFiddle");
done();
});
});
});

Answer 1

You can set capabilities while defining your driver object.
https://seleniumhq.github.io/selenium/docs/api/java/org/openqa/selenium/ie/InternetExplorerDriver.html#UNEXPECTED_ALERT_BEHAVIOR
Refer this link on how to set Capabilities. This will help you define a generic behavior when your alerts are intermittent.