How to emulate mouse hover with Capybara

Capybara provides Element#hover method from version 2.1:

find('.some_class').hover

This method is implemented in Capybara::Selenium::Driver in almost the same way as in @AlexD’s answer.

Note that to use #hover in Selenium it’s usually better to turn native events on:

Capybara.register_driver :selenium do |app|
  profile = Selenium::WebDriver::Firefox::Profile.new
  profile.native_events = true
  Capybara::Selenium::Driver.new(app, :browser => :firefox, profile: profile)
end