Testing model that acts_as_nested_set with RSpec - ruby-on-rails

Question

I have an Organization model that acts_as_nested_set, using awesome_nested_set:
class Organization < ActiveRecord::Base
acts_as_nested_set
attr_accessible :name, :location_id, :parent_id
has_many :org_prod_relationships, dependent: :destroy
has_many :products, through: :org_prod_relationships
def has_product?(prod)
org_prod_relationships.find_by_product_id(prod.id)
end
def add_product!(prod)
org_prod_relationships.create!(product_id: prod.id)
end
def publish_product!(prod)
self.descendants.each do |d|
d.add_product!(prod)
end
end
end
How can I write a test in RSpec for publish_product!, and/or is this the wrong approach to creating org_product_relationships in a nested set, and therefore hard to test? My non-working attempt is here (clipped from the larger spec file) https://gist.github.com/3911555.
EDIT: Updating to include the error message. Note, lines 79 and 80 are:
it { should have_product(product) }
its(:products) { should include(product) }
in the gist.
Failures:
1) Organization publishes_product
Failure/Error: it { should have_product(product) }
expected #has_product?(#<Product id: 34, name: "floo powder", created_at: "2012-10-21 14:15:08", updated_at: "2012-10-21 14:15:08", photo_file_name: nil, photo_content_type: nil, photo_file_size: nil, photo_updated_at: nil>) to return true, got false
# ./spec/models/organization_spec.rb:79:in `block (3 levels) in <top (required)>'
2) Organization publishes_product products
Failure/Error: its(:products) { should include(product) }
expected [] to include #<Product id: 35, name: "floo powder", created_at: "2012-10-21 14:15:08", updated_at: "2012-10-21 14:15:08", photo_file_name: nil, photo_content_type: nil, photo_file_size: nil, photo_updated_at: nil>
Diff:
## -1,2 +1,2 ##
-[#<Product id: 35, name: "floo powder", created_at: "2012-10-21 14:15:08", updated_at: "2012-10-21 14:15:08", photo_file_name: nil, photo_content_type: nil, photo_file_size: nil, photo_updated_at: nil>]
+[]
# ./spec/models/organization_spec.rb:80:in `block (3 levels) in <top (required)>'
Finished in 29.93 seconds
184 examples, 2 failures
Failed examples:
rspec ./spec/models/organization_spec.rb:79 # Organization publishes_product
rspec ./spec/models/organization_spec.rb:80 # Organization publishes_product products

Answer 1

I think you have to reload an object. Try the following:
#organization.products.reload
After you publish products in the before statements. Basically once the #organization is saved, calling #organization.products has a force_reload=false. Reference: http://guides.rubyonrails.org/association_basics.html#has_many-association-reference
Also since you asked, given that you have set up the relationships, you actually should be able to define your methods using the products relationship:
def has_product?(prod)
products.include? prod
end
def add_product!(prod)
products << prod
end
I think if you define the methods that way, you may not have to reload because the organization.products association is already updated.
Hope that helps.