class Selenium::WebDriver::Window

def rect=(rectangle)
  unless %w[x y width height].all? { |val| rectangle.respond_to? val }
    raise ArgumentError, "expected #{rectangle.inspect}:#{rectangle.class} " \
                         'to respond to #x, #y, #width, and #height'
  end
  @bridge.set_window_rect(x: rectangle.x,
                          y: rectangle.y,
                          width: rectangle.width,
                          height: rectangle.height)
end