class Selenium::WebDriver::Interactions::PointerPress

def assert_button(button)
  if button.is_a? Symbol
    raise TypeError, "#{button.inspect} is not a valid button!" unless BUTTONS.key? button
    button = BUTTONS[button]
  end
  raise ArgumentError, 'Button number cannot be negative!' unless button >= 0
  button
end

def assert_direction(direction)
  raise TypeError, "#{direction.inspect} is not a valid button direction" unless DIRECTIONS.key? direction
  DIRECTIONS[direction]
end

def encode
  {type: type, button: @button}
end

def initialize(source, direction, button)
  super(source)
  @direction = assert_direction(direction)
  @button = assert_button(button)
end

def type
  @direction
end