Managing windows with Selenium / Capybara in Ruby

managing-windows-selenium-capybara.md

Capybara 3.13.2 / Ruby 2.5.0 / selenium-webdriver (3.141.0) / chromedriver-helper (2.1.0) / ChromeDriver 2.34.522932

Setup

require 'selenium-webdriver'
require 'capybara/dsl'

class C
  extend Capybara::DSL
end

Window management

• Current windows / tabs: C.windows
• Switch to window: C.switch_to_window(C.windows.last)
  • The order of the tabs is the one they were opened, if you rearange them, the order stays the same
  • Open each tab for 5 seconds: C.windows.each { |w| C.switch_to_window(w); sleep 5 }
• Resize window: C.windows.first.resize_to(500, 500)
  • Resize to current screen (macOS, retina display)

coords = system_profiler SPDisplaysDataType | grep Resolution`.scan(/[0-9]+/).map(&:to_i)
C.windows.first.resize_to(coords.first / 2, coords.last / 2)

• Open new tab: C.open_new_window

Misc

• Current url: C.current_url

• Safe execute script (swallows an error that happens every time a command is executed, even when everything goes well):

def safe_execute_script(script)
  C.execute_script(script)
rescue Selenium::WebDriver::Error::UnknownError => e
  puts e.message
end

• fill_in (uses jQuery and safe execute script to fill in an input)

def fill_in(selector, value)
  safe_execute_script("$('#{selector}').val('#{value}')")
rescue Selenium::WebDriver::Error::UnknownError => e
  puts e.message
end