diff --git a/activerecord/test/cases/associations/habtm_join_table_test.rb b/activerecord/test/cases/associations/habtm_join_table_test.rb
index bf3e04c..2512554 100644
--- a/activerecord/test/cases/associations/habtm_join_table_test.rb
+++ b/activerecord/test/cases/associations/habtm_join_table_test.rb
@@ -1,11 +1,22 @@
 require 'cases/helper'
 
 class MyReader < ActiveRecord::Base
-  has_and_belongs_to_many :my_books
+  has_and_belongs_to_many :my_books do
+    def unreviewed_books 
+      self.find(:all, 
+      :joins => "left join my_book_reviews on my_books.my_book_id = my_book_reviews.my_book_id",
+      :conditions => "my_book_reviews.my_book_id is null")
+    end
+  end
 end
 
 class MyBook < ActiveRecord::Base
   has_and_belongs_to_many :my_readers
+  has_many :my_book_reviews
+end
+
+class MyBookReviews < ActiveRecord::Base
+  belongs_to :my_book
 end
 
 class HabtmJoinTableTest < ActiveRecord::TestCase
@@ -25,12 +36,20 @@ class HabtmJoinTableTest < ActiveRecord::TestCase
       t.integer :my_reader_id
     end
     assert ActiveRecord::Base.connection.table_exists?(:my_books_my_readers)
+
+    ActiveRecord::Base.connection.create_table :my_book_reviews, :force => true do |t|
+      t.integer :my_book_review_id
+      t.integer :my_book_id
+    end
+    assert ActiveRecord::Base.connection.table_exists?(:my_book_reviews)
+
   end
 
   def teardown
     ActiveRecord::Base.connection.drop_table :my_books
     ActiveRecord::Base.connection.drop_table :my_readers
     ActiveRecord::Base.connection.drop_table :my_books_my_readers
+    ActiveRecord::Base.connection.drop_table :my_book_reviews
   end
 
   uses_transaction :test_should_raise_exception_when_join_table_has_a_primary_key
@@ -53,4 +72,11 @@ class HabtmJoinTableTest < ActiveRecord::TestCase
       weaz.my_books << MyBook.create(:name=>'Greater Expectations')
     end
   end
+
+
+  uses_transaction :test_should_allow_join_in_association_function 
+  def test_should_allow_join_in_association_function 
+    jaime = MyReader.create(:name=>"Jaime")
+    assert_nil jaime.my_books.unreviewed_books
+  end
 end