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module Spec
module Rails
module Example
class HelperExampleGroupController < ApplicationController #:nodoc:
attr_accessor :request, :url
end
# Helper Specs live in $RAILS_ROOT/spec/helpers/.
#
# Helper Specs use Spec::Rails::Example::HelperExampleGroup, which allows you to
# include your Helper directly in the context and write specs directly
# against its methods.
#
# HelperExampleGroup also includes the standard lot of ActionView::Helpers in case your
# helpers rely on any of those.
#
# == Example
#
# module ThingHelper
# def number_of_things
# Thing.count
# end
# end
#
# describe "ThingHelper example_group" do
# include ThingHelper
# it "should tell you the number of things" do
# Thing.should_receive(:count).and_return(37)
# number_of_things.should == 37
# end
# end
class HelperExampleGroup < FunctionalExampleGroup
tests HelperExampleGroupController
attr_accessor :output_buffer
class HelperObject < ActionView::Base
def initialize(*args)
@template = self
super
end
def protect_against_forgery?
false
end
attr_writer :session, :request, :flash, :params, :controller
private
attr_reader :session, :request, :flash, :params, :controller
end
class << self
# The helper name....
def helper_name(name=nil)
@helper_being_described = "#{name}_helper".camelize.constantize
send :include, @helper_being_described
end
def helper
HelperObject.new.tap do |helper_object|
if @helper_being_described.nil?
if described_type.class == Module
helper_object.extend described_type
end
else
helper_object.extend @helper_being_described
end
end
end
end
# Returns an instance of ActionView::Base with the helper being spec'd
# included.
#
# == Example
#
# describe PersonHelper do
# it "should write a link to person with the name" do
# assigns[:person] = mock_model(Person, :full_name => "Full Name", :id => 37, :new_record? => false)
# helper.link_to_person.should == %{<a href="/people/37">Full Name</a>}
# end
# end
#
# module PersonHelper
# def link_to_person
# link_to person.full_name, url_for(person)
# end
# end
#
def helper
@helper ||= self.class.helper
end
def orig_assigns
helper.assigns
end
# Reverse the load order so that custom helpers which are defined last
# are also loaded last.
ActionView::Base.included_modules.reverse.each do |mod|
include mod if mod.parents.include?(ActionView::Helpers)
end
before(:each) do
@controller.request = @request
@controller.url = ActionController::UrlRewriter.new @request, {} # url_for
@flash = ActionController::Flash::FlashHash.new
session['flash'] = @flash
@output_buffer = ""
@template = helper
ActionView::Helpers::AssetTagHelper::reset_javascript_include_default
helper.session = session
helper.request = @request
helper.flash = flash
helper.params = params
helper.controller = @controller
end
def flash
@flash
end
def eval_erb(text)
erb_args = [text]
if helper.respond_to?(:output_buffer)
erb_args += [nil, nil, '@output_buffer']
end
helper.instance_eval do
ERB.new(*erb_args).result(binding)
end
end
# TODO: BT - Helper Examples should proxy method_missing to a Rails View instance.
# When that is done, remove this method
def protect_against_forgery?
false
end
Spec::Example::ExampleGroupFactory.register(:helper, self)
protected
def _assigns_hash_proxy
@_assigns_hash_proxy ||= AssignsHashProxy.new(self) {helper}
end
end
end
end
end
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