module ActionView::TestCase::Behavior

def _routes
  @controller._routes if @controller.respond_to?(:_routes)
end

def _test_case
  controller._test_case
end

def _user_defined_ivars
  instance_variables - INTERNAL_IVARS
end

def config
  @controller.config if @controller.respond_to?(:config)
end

def document_root_element
  Nokogiri::HTML::Document.parse(@rendered.blank? ? @output_buffer : @rendered).root
end

def method_missing(selector, *args)
  begin
    routes = @controller.respond_to?(:_routes) && @controller._routes
  rescue
    # Don't call routes, if there is an error on _routes call
  end
  if routes &&
     (routes.named_routes.route_defined?(selector) ||
       routes.mounted_helpers.method_defined?(selector))
    @controller.__send__(selector, *args)
  else
    super
  end
end

def protect_against_forgery?
  false
end

def render(options = {}, local_assigns = {}, &block)
  view.assign(view_assigns)
  @rendered << output = view.render(options, local_assigns, &block)
  output
end

def rendered_views
  @_rendered_views ||= RenderedViewsCollection.new
end

def respond_to_missing?(name, include_private = false)
  begin
    routes = defined?(@controller) && @controller.respond_to?(:_routes) && @controller._routes
  rescue
    # Don't call routes, if there is an error on _routes call
  end
  routes &&
    (routes.named_routes.route_defined?(name) ||
     routes.mounted_helpers.method_defined?(name))
end

def setup_with_controller
  controller_class = Class.new(ActionView::TestCase::TestController)
  @controller = controller_class.new
  @request = @controller.request
  @view_flow = ActionView::OutputFlow.new
  # empty string ensures buffer has UTF-8 encoding as
  # new without arguments returns ASCII-8BIT encoded buffer like String#new
  @output_buffer = ActiveSupport::SafeBuffer.new ""
  @rendered = +""
  test_case_instance = self
  controller_class.define_method(:_test_case) { test_case_instance }
end

def view
  @view ||= begin
    view = @controller.view_context
    view.singleton_class.include(_helpers)
    view.extend(Locals)
    view.rendered_views = rendered_views
    view.output_buffer = output_buffer
    view
  end
end

def view_assigns
  Hash[_user_defined_ivars.map do |ivar|
    [ivar[1..-1].to_sym, instance_variable_get(ivar)]
  end]
end