Capybara helper to resize browser for an action, then put it back.

capybara_helper_resize.rb

# Wrap some code with this block to change the browser window size
# When the block exits, it will resize to its original dimensions
# with_browser_size(1024, 768) { find('.hidden-sm').click }
def with_browser_size(width, height, &block)
  window = Capybara.current_session.driver.browser.manage.window
  before_size = window.size
  window.resize_to(width, height)
  yield
  window.resize_to(before_size[:width], before_size[:height])
end