class Opal::Rewriters::OpalEngineCheck

def on_if(node)
  test, true_body, false_body = *node.children
  if skip_check_present?(test)
    process(true_body || s(:nil))
  elsif skip_check_present_not?(test)
    process(false_body || s(:nil))
  else
    super
  end
end

def skip_check_present?(test)
  test == RUBY_ENGINE_CHECK || test == RUBY_PLATFORM_CHECK
end

def skip_check_present_not?(test)
  test == RUBY_ENGINE_CHECK_NOT || test == RUBY_PLATFORM_CHECK_NOT
end