user137369 user137369 - 2 months ago 12
Ruby Question

phantomjs via watir-webdriver, not handling javascript alerts

I’m trying to automate some tasks on a webpage, and part of it includes clicking a link that’ll show a javascript alert where you have to press “OK”. Trouble is, when it gets to that point, it fails with the following error

/Users/username/.gem/ruby/2.0.0/gems/selenium-webdriver-2.35.1/lib/selenium/webdriver/remote/http/common.rb:66:in `create_response': unexpected response, code=405, content-type="text/plain" (Selenium::WebDriver::Error::WebDriverError)
Invalid Command Method - Request => {"headers":{"Accept":"application/json","Accept-Encoding":"gzip;q=1.0,deflate;q=0.6,identity;q=0.3","Cache-Control":"no-cache","Connection":"close","Host":"127.0.0.1:8910","User-Agent":"Ruby"},"httpVersion":"1.1","method":"GET","url":"/alert_text","urlParsed":{"anchor":"","query":"","file":"alert_text","directory":"/","path":"/alert_text","relative":"/alert_text","port":"","host":"","password":"","user":"","userInfo":"","authority":"","protocol":"","source":"/alert_text","queryKey":{},"chunks":["alert_text"]},"urlOriginal":"/session/6772bf50-2ad9-11e3-86e7-55e618e30fa2/alert_text"}
from /Users/username/.gem/ruby/2.0.0/gems/selenium-webdriver-2.35.1/lib/selenium/webdriver/remote/http/default.rb:66:in `request'
from /Users/username/.gem/ruby/2.0.0/gems/selenium-webdriver-2.35.1/lib/selenium/webdriver/remote/http/common.rb:40:in `call'
from /Users/username/.gem/ruby/2.0.0/gems/selenium-webdriver-2.35.1/lib/selenium/webdriver/remote/bridge.rb:634:in `raw_execute'
from /Users/username/.gem/ruby/2.0.0/gems/selenium-webdriver-2.35.1/lib/selenium/webdriver/remote/bridge.rb:612:in `execute'
from /Users/username/.gem/ruby/2.0.0/gems/selenium-webdriver-2.35.1/lib/selenium/webdriver/remote/bridge.rb:150:in `getAlertText'
from /Users/username/.gem/ruby/2.0.0/gems/selenium-webdriver-2.35.1/lib/selenium/webdriver/common/alert.rb:9:in `initialize'
from /Users/username/.gem/ruby/2.0.0/gems/selenium-webdriver-2.35.1/lib/selenium/webdriver/common/target_locator.rb:76:in `new'
from /Users/username/.gem/ruby/2.0.0/gems/selenium-webdriver-2.35.1/lib/selenium/webdriver/common/target_locator.rb:76:in `alert'
from /Users/username/.gem/ruby/2.0.0/gems/watir-webdriver-0.6.4/lib/watir-webdriver/alert.rb:93:in `assert_exists'
from /Users/username/.gem/ruby/2.0.0/gems/watir-webdriver-0.6.4/lib/watir-webdriver/alert.rb:37:in `ok'
from ./olx:21:in `block in <main>'
from ./olx:19:in `times'
from ./olx:19:in `<main>'


Searching online, it seems like the trouble may be related to ghostdriver and that maybe phantomjs can’t do it, but that notion seems a bit weird to me (it’s called phantom*js*, after all, and an alert is pretty basic javascript), but maybe I’m looking at it wrong.

Running the script with chrome, it works flawlessly.

Answer

There's a known issue where PhantomJS doesn't handle JavaScript properly. One workaround is to disable the alert box by running:

@browser.execute_script("window.confirm = function(){return true;}");

Basically, the steps you want to follow are:

  1. Go to the page
  2. Run the command above
  3. Click 'Delete' (or whatever that triggers the alertbox)
  4. And it will automatically click 'Ok' for you.