rspec users - Aug 2006 - Testing has_many, :through relationships

Hi All,

This is my first post on this list.  I''m a developer working on the
Central Coast of NSW, Australia and came across RSpec via Lachie who
demoed RSpec on Rails at a Sydney rails user group meeting a couple of
months ago.  I''m loving the expressiveness of RSpec and can''t
really
see myself going back to Test::Unit.

I''ve come across one oddity though.  I have 3 models, two in a typical
many to many relationship, with the other providing the join:

class Book < ActiveRecord::Base
  has_many :readings
  has_many :readers, :through => :readings
end

class Reader < ActiveRecord::Base
  has_many :readings
  has_many :books, :through => :readings
end

class Reading < ActiveRecord::Base
  belongs_to :book
  belongs_to :reader
end

My spec is simply:

context "Ben" do
  fixtures :readers, :books, :readings
  specify "should have read HHGTTG" do
    ben = readers(:Ben)
    ben.books.should_include books(:HHGTTG)
  end
end

And the spec fails with:

TypeError in ''Ben should have read HHGTTG''
wrong argument type Book (expected Module)

A quick test in the console reveals that:

ben.books.include? Book.find(:first)

returns true, which I''m assuming is the logical expression that the
spec resolves to.

Is this a problem with my spec or a problem with Rspec on Rails?  I''ve
only been using it for the last couple of hours so I expect I''m the
problem.

cheers,
Ben
-- 
http://teamaskins.net