X-Git-Url: https://git.njae.me.uk/?a=blobdiff_plain;f=vendor%2Frails%2Factiverecord%2Ftest%2Fcases%2Fassociations%2Fjoin_model_test.rb;fp=vendor%2Frails%2Factiverecord%2Ftest%2Fcases%2Fassociations%2Fjoin_model_test.rb;h=b1060d01af7edd579e179934b21a7626c5d5044c;hb=437aa336c44c74a30aeea16a06743c32747ed661;hp=0000000000000000000000000000000000000000;hpb=97a0772b06264134cfe38e7494f9427efe0840a0;p=feedcatcher.git

diff --git a/vendor/rails/activerecord/test/cases/associations/join_model_test.rb b/vendor/rails/activerecord/test/cases/associations/join_model_test.rb
new file mode 100644
index 0000000..b1060d0
--- /dev/null
+++ b/vendor/rails/activerecord/test/cases/associations/join_model_test.rb
@@ -0,0 +1,712 @@
+require "cases/helper"
+require 'models/tag'
+require 'models/tagging'
+require 'models/post'
+require 'models/item'
+require 'models/comment'
+require 'models/author'
+require 'models/category'
+require 'models/categorization'
+require 'models/vertex'
+require 'models/edge'
+require 'models/book'
+require 'models/citation'
+
+class AssociationsJoinModelTest < ActiveRecord::TestCase
+  self.use_transactional_fixtures = false
+  fixtures :posts, :authors, :categories, :categorizations, :comments, :tags, :taggings, :author_favorites, :vertices, :items, :books
+
+  def test_has_many
+    assert authors(:david).categories.include?(categories(:general))
+  end
+
+  def test_has_many_inherited
+    assert authors(:mary).categories.include?(categories(:sti_test))
+  end
+
+  def test_inherited_has_many
+    assert categories(:sti_test).authors.include?(authors(:mary))
+  end
+
+  def test_has_many_uniq_through_join_model
+    assert_equal 2, authors(:mary).categorized_posts.size
+    assert_equal 1, authors(:mary).unique_categorized_posts.size
+  end
+
+  def test_has_many_uniq_through_count
+    author = authors(:mary)
+    assert !authors(:mary).unique_categorized_posts.loaded?
+    assert_queries(1) { assert_equal 1, author.unique_categorized_posts.count }
+    assert_queries(1) { assert_equal 1, author.unique_categorized_posts.count(:title) }
+    assert_queries(1) { assert_equal 0, author.unique_categorized_posts.count(:title, :conditions => "title is NULL") }
+    assert !authors(:mary).unique_categorized_posts.loaded?
+  end
+  
+  def test_has_many_uniq_through_find
+    assert_equal 1, authors(:mary).unique_categorized_posts.find(:all).size
+  end
+  
+  def test_has_many_uniq_through_dynamic_find
+    assert_equal 1, authors(:mary).unique_categorized_posts.find_all_by_title("So I was thinking").size
+  end
+
+  def test_polymorphic_has_many
+    assert posts(:welcome).taggings.include?(taggings(:welcome_general))
+  end
+
+  def test_polymorphic_has_one
+    assert_equal taggings(:welcome_general), posts(:welcome).tagging
+  end
+
+  def test_polymorphic_belongs_to
+    assert_equal posts(:welcome), posts(:welcome).taggings.first.taggable
+  end
+
+  def test_polymorphic_has_many_going_through_join_model
+    assert_equal tags(:general), tag = posts(:welcome).tags.first
+    assert_no_queries do
+      tag.tagging
+    end
+  end
+
+  def test_count_polymorphic_has_many
+    assert_equal 1, posts(:welcome).taggings.count
+    assert_equal 1, posts(:welcome).tags.count
+  end
+
+  def test_polymorphic_has_many_going_through_join_model_with_find
+    assert_equal tags(:general), tag = posts(:welcome).tags.find(:first)
+    assert_no_queries do
+      tag.tagging
+    end
+  end
+
+  def test_polymorphic_has_many_going_through_join_model_with_include_on_source_reflection
+    assert_equal tags(:general), tag = posts(:welcome).funky_tags.first
+    assert_no_queries do
+      tag.tagging
+    end
+  end
+
+  def test_polymorphic_has_many_going_through_join_model_with_include_on_source_reflection_with_find
+    assert_equal tags(:general), tag = posts(:welcome).funky_tags.find(:first)
+    assert_no_queries do
+      tag.tagging
+    end
+  end
+
+  def test_polymorphic_has_many_going_through_join_model_with_disabled_include
+    assert_equal tags(:general), tag = posts(:welcome).tags.add_joins_and_select.first
+    assert_queries 1 do
+      tag.tagging
+    end
+  end
+
+  def test_polymorphic_has_many_going_through_join_model_with_custom_select_and_joins
+    assert_equal tags(:general), tag = posts(:welcome).tags.add_joins_and_select.first
+    tag.author_id
+  end
+
+  def test_polymorphic_has_many_going_through_join_model_with_custom_foreign_key
+    assert_equal tags(:misc), taggings(:welcome_general).super_tag
+    assert_equal tags(:misc), posts(:welcome).super_tags.first
+  end
+
+  def test_polymorphic_has_many_create_model_with_inheritance_and_custom_base_class
+    post = SubStiPost.create :title => 'SubStiPost', :body => 'SubStiPost body'
+    assert_instance_of SubStiPost, post
+
+    tagging = tags(:misc).taggings.create(:taggable => post)
+    assert_equal "SubStiPost", tagging.taggable_type
+  end
+
+  def test_polymorphic_has_many_going_through_join_model_with_inheritance
+    assert_equal tags(:general), posts(:thinking).tags.first
+  end
+
+  def test_polymorphic_has_many_going_through_join_model_with_inheritance_with_custom_class_name
+    assert_equal tags(:general), posts(:thinking).funky_tags.first
+  end
+
+  def test_polymorphic_has_many_create_model_with_inheritance
+    post = posts(:thinking)
+    assert_instance_of SpecialPost, post
+
+    tagging = tags(:misc).taggings.create(:taggable => post)
+    assert_equal "Post", tagging.taggable_type
+  end
+
+  def test_polymorphic_has_one_create_model_with_inheritance
+    tagging = tags(:misc).create_tagging(:taggable => posts(:thinking))
+    assert_equal "Post", tagging.taggable_type
+  end
+
+  def test_set_polymorphic_has_many
+    tagging = tags(:misc).taggings.create
+    posts(:thinking).taggings << tagging
+    assert_equal "Post", tagging.taggable_type
+  end
+
+  def test_set_polymorphic_has_one
+    tagging = tags(:misc).taggings.create
+    posts(:thinking).tagging = tagging
+    assert_equal "Post", tagging.taggable_type
+  end
+
+  def test_create_polymorphic_has_many_with_scope
+    old_count = posts(:welcome).taggings.count
+    tagging = posts(:welcome).taggings.create(:tag => tags(:misc))
+    assert_equal "Post", tagging.taggable_type
+    assert_equal old_count+1, posts(:welcome).taggings.count
+  end
+
+  def test_create_bang_polymorphic_with_has_many_scope
+    old_count = posts(:welcome).taggings.count
+    tagging = posts(:welcome).taggings.create!(:tag => tags(:misc))
+    assert_equal "Post", tagging.taggable_type
+    assert_equal old_count+1, posts(:welcome).taggings.count
+  end
+
+  def test_create_polymorphic_has_one_with_scope
+    old_count = Tagging.count
+    tagging = posts(:welcome).tagging.create(:tag => tags(:misc))
+    assert_equal "Post", tagging.taggable_type
+    assert_equal old_count+1, Tagging.count
+  end
+
+  def test_delete_polymorphic_has_many_with_delete_all
+    assert_equal 1, posts(:welcome).taggings.count
+    posts(:welcome).taggings.first.update_attribute :taggable_type, 'PostWithHasManyDeleteAll'
+    post = find_post_with_dependency(1, :has_many, :taggings, :delete_all)
+
+    old_count = Tagging.count
+    post.destroy
+    assert_equal old_count-1, Tagging.count
+    assert_equal 0, posts(:welcome).taggings.count
+  end
+
+  def test_delete_polymorphic_has_many_with_destroy
+    assert_equal 1, posts(:welcome).taggings.count
+    posts(:welcome).taggings.first.update_attribute :taggable_type, 'PostWithHasManyDestroy'
+    post = find_post_with_dependency(1, :has_many, :taggings, :destroy)
+
+    old_count = Tagging.count
+    post.destroy
+    assert_equal old_count-1, Tagging.count
+    assert_equal 0, posts(:welcome).taggings.count
+  end
+
+  def test_delete_polymorphic_has_many_with_nullify
+    assert_equal 1, posts(:welcome).taggings.count
+    posts(:welcome).taggings.first.update_attribute :taggable_type, 'PostWithHasManyNullify'
+    post = find_post_with_dependency(1, :has_many, :taggings, :nullify)
+
+    old_count = Tagging.count
+    post.destroy
+    assert_equal old_count, Tagging.count
+    assert_equal 0, posts(:welcome).taggings.count
+  end
+
+  def test_delete_polymorphic_has_one_with_destroy
+    assert posts(:welcome).tagging
+    posts(:welcome).tagging.update_attribute :taggable_type, 'PostWithHasOneDestroy'
+    post = find_post_with_dependency(1, :has_one, :tagging, :destroy)
+
+    old_count = Tagging.count
+    post.destroy
+    assert_equal old_count-1, Tagging.count
+    assert_nil posts(:welcome).tagging(true)
+  end
+
+  def test_delete_polymorphic_has_one_with_nullify
+    assert posts(:welcome).tagging
+    posts(:welcome).tagging.update_attribute :taggable_type, 'PostWithHasOneNullify'
+    post = find_post_with_dependency(1, :has_one, :tagging, :nullify)
+
+    old_count = Tagging.count
+    post.destroy
+    assert_equal old_count, Tagging.count
+    assert_nil posts(:welcome).tagging(true)
+  end
+
+  def test_has_many_with_piggyback
+    assert_equal "2", categories(:sti_test).authors.first.post_id.to_s
+  end
+
+  def test_include_has_many_through
+    posts              = Post.find(:all, :order => 'posts.id')
+    posts_with_authors = Post.find(:all, :include => :authors, :order => 'posts.id')
+    assert_equal posts.length, posts_with_authors.length
+    posts.length.times do |i|
+      assert_equal posts[i].authors.length, assert_no_queries { posts_with_authors[i].authors.length }
+    end
+  end
+
+  def test_include_polymorphic_has_one
+    post    = Post.find_by_id(posts(:welcome).id, :include => :tagging)
+    tagging = taggings(:welcome_general)
+    assert_no_queries do
+      assert_equal tagging, post.tagging
+    end
+  end
+
+  def test_include_polymorphic_has_one_defined_in_abstract_parent
+    item    = Item.find_by_id(items(:dvd).id, :include => :tagging)
+    tagging = taggings(:godfather)
+    assert_no_queries do
+      assert_equal tagging, item.tagging
+    end
+  end
+
+  def test_include_polymorphic_has_many_through
+    posts           = Post.find(:all, :order => 'posts.id')
+    posts_with_tags = Post.find(:all, :include => :tags, :order => 'posts.id')
+    assert_equal posts.length, posts_with_tags.length
+    posts.length.times do |i|
+      assert_equal posts[i].tags.length, assert_no_queries { posts_with_tags[i].tags.length }
+    end
+  end
+
+  def test_include_polymorphic_has_many
+    posts               = Post.find(:all, :order => 'posts.id')
+    posts_with_taggings = Post.find(:all, :include => :taggings, :order => 'posts.id')
+    assert_equal posts.length, posts_with_taggings.length
+    posts.length.times do |i|
+      assert_equal posts[i].taggings.length, assert_no_queries { posts_with_taggings[i].taggings.length }
+    end
+  end
+
+  def test_has_many_find_all
+    assert_equal [categories(:general)], authors(:david).categories.find(:all)
+  end
+
+  def test_has_many_find_first
+    assert_equal categories(:general), authors(:david).categories.find(:first)
+  end
+
+  def test_has_many_with_hash_conditions
+    assert_equal categories(:general), authors(:david).categories_like_general.find(:first)
+  end
+
+  def test_has_many_find_conditions
+    assert_equal categories(:general), authors(:david).categories.find(:first, :conditions => "categories.name = 'General'")
+    assert_equal nil, authors(:david).categories.find(:first, :conditions => "categories.name = 'Technology'")
+  end
+
+  def test_has_many_class_methods_called_by_method_missing
+    assert_equal categories(:general), authors(:david).categories.find_all_by_name('General').first
+    assert_equal nil, authors(:david).categories.find_by_name('Technology')
+  end
+
+  def test_has_many_array_methods_called_by_method_missing
+    assert true, authors(:david).categories.any? { |category| category.name == 'General' }
+    assert_nothing_raised { authors(:david).categories.sort }
+  end
+
+  def test_has_many_going_through_join_model_with_custom_foreign_key
+    assert_equal [], posts(:thinking).authors
+    assert_equal [authors(:mary)], posts(:authorless).authors
+  end
+  
+  def test_both_scoped_and_explicit_joins_should_be_respected
+    assert_nothing_raised do
+      Post.send(:with_scope, :find => {:joins => "left outer join comments on comments.id = posts.id"}) do
+        Post.find :all, :select => "comments.id, authors.id", :joins => "left outer join authors on authors.id = posts.author_id"
+      end
+    end
+  end
+
+  def test_belongs_to_polymorphic_with_counter_cache
+    assert_equal 0, posts(:welcome)[:taggings_count]
+    tagging = posts(:welcome).taggings.create(:tag => tags(:general))
+    assert_equal 1, posts(:welcome, :reload)[:taggings_count]
+    tagging.destroy
+    assert posts(:welcome, :reload)[:taggings_count].zero?
+  end
+
+  def test_unavailable_through_reflection
+    assert_raise(ActiveRecord::HasManyThroughAssociationNotFoundError) { authors(:david).nothings }
+  end
+
+  def test_has_many_through_join_model_with_conditions
+    assert_equal [], posts(:welcome).invalid_taggings
+    assert_equal [], posts(:welcome).invalid_tags
+  end
+
+  def test_has_many_polymorphic
+    assert_raise ActiveRecord::HasManyThroughAssociationPolymorphicError do
+      assert_equal posts(:welcome, :thinking), tags(:general).taggables
+    end
+    assert_raise ActiveRecord::EagerLoadPolymorphicError do
+      assert_equal posts(:welcome, :thinking), tags(:general).taggings.find(:all, :include => :taggable, :conditions => 'bogus_table.column = 1')
+    end
+  end
+
+  def test_has_many_polymorphic_with_source_type
+    assert_equal posts(:welcome, :thinking), tags(:general).tagged_posts
+  end
+
+  def test_eager_has_many_polymorphic_with_source_type
+    tag_with_include = Tag.find(tags(:general).id, :include => :tagged_posts)
+    desired = posts(:welcome, :thinking)
+    assert_no_queries do
+      assert_equal desired, tag_with_include.tagged_posts
+    end
+    assert_equal 5, tag_with_include.taggings.length
+  end
+
+  def test_has_many_through_has_many_find_all
+    assert_equal comments(:greetings), authors(:david).comments.find(:all, :order => 'comments.id').first
+  end
+
+  def test_has_many_through_has_many_find_all_with_custom_class
+    assert_equal comments(:greetings), authors(:david).funky_comments.find(:all, :order => 'comments.id').first
+  end
+
+  def test_has_many_through_has_many_find_first
+    assert_equal comments(:greetings), authors(:david).comments.find(:first, :order => 'comments.id')
+  end
+
+  def test_has_many_through_has_many_find_conditions
+    options = { :conditions => "comments.#{QUOTED_TYPE}='SpecialComment'", :order => 'comments.id' }
+    assert_equal comments(:does_it_hurt), authors(:david).comments.find(:first, options)
+  end
+
+  def test_has_many_through_has_many_find_by_id
+    assert_equal comments(:more_greetings), authors(:david).comments.find(2)
+  end
+
+  def test_has_many_through_polymorphic_has_one
+    assert_raise(ActiveRecord::HasManyThroughSourceAssociationMacroError) { authors(:david).tagging }
+  end
+
+  def test_has_many_through_polymorphic_has_many
+    assert_equal taggings(:welcome_general, :thinking_general), authors(:david).taggings.uniq.sort_by { |t| t.id }
+  end
+
+  def test_include_has_many_through_polymorphic_has_many
+    author            = Author.find_by_id(authors(:david).id, :include => :taggings)
+    expected_taggings = taggings(:welcome_general, :thinking_general)
+    assert_no_queries do
+      assert_equal expected_taggings, author.taggings.uniq.sort_by { |t| t.id }
+    end
+  end
+
+  def test_has_many_through_has_many_through
+    assert_raise(ActiveRecord::HasManyThroughSourceAssociationMacroError) { authors(:david).tags }
+  end
+
+  def test_has_many_through_habtm
+    assert_raise(ActiveRecord::HasManyThroughSourceAssociationMacroError) { authors(:david).post_categories }
+  end
+
+  def test_eager_load_has_many_through_has_many
+    author = Author.find :first, :conditions => ['name = ?', 'David'], :include => :comments, :order => 'comments.id'
+    SpecialComment.new; VerySpecialComment.new
+    assert_no_queries do
+      assert_equal [1,2,3,5,6,7,8,9,10], author.comments.collect(&:id)
+    end
+  end
+
+  def test_eager_load_has_many_through_has_many_with_conditions
+    post = Post.find(:first, :include => :invalid_tags)
+    assert_no_queries do
+      post.invalid_tags
+    end
+  end
+
+  def test_eager_belongs_to_and_has_one_not_singularized
+    assert_nothing_raised do
+      Author.find(:first, :include => :author_address)
+      AuthorAddress.find(:first, :include => :author)
+    end
+  end
+
+  def test_self_referential_has_many_through
+    assert_equal [authors(:mary)], authors(:david).favorite_authors
+    assert_equal [],               authors(:mary).favorite_authors
+  end
+
+  def test_add_to_self_referential_has_many_through
+    new_author = Author.create(:name => "Bob")
+    authors(:david).author_favorites.create :favorite_author => new_author
+    assert_equal new_author, authors(:david).reload.favorite_authors.first
+  end
+
+  def test_has_many_through_uses_conditions_specified_on_the_has_many_association
+    author = Author.find(:first)
+    assert !author.comments.blank?
+    assert author.nonexistant_comments.blank?
+  end
+
+  def test_has_many_through_uses_correct_attributes
+    assert_nil posts(:thinking).tags.find_by_name("General").attributes["tag_id"]
+  end
+
+  def test_associating_unsaved_records_with_has_many_through
+    saved_post = posts(:thinking)
+    new_tag = Tag.new(:name => "new")
+
+    saved_post.tags << new_tag
+    assert !new_tag.new_record? #consistent with habtm!
+    assert !saved_post.new_record?
+    assert saved_post.tags.include?(new_tag)
+
+    assert !new_tag.new_record?
+    assert saved_post.reload.tags(true).include?(new_tag)
+
+
+    new_post = Post.new(:title => "Association replacmenet works!", :body => "You best believe it.")
+    saved_tag = tags(:general)
+
+    new_post.tags << saved_tag
+    assert new_post.new_record?
+    assert !saved_tag.new_record?
+    assert new_post.tags.include?(saved_tag)
+
+    new_post.save!
+    assert !new_post.new_record?
+    assert new_post.reload.tags(true).include?(saved_tag)
+
+    assert posts(:thinking).tags.build.new_record?
+    assert posts(:thinking).tags.new.new_record?
+  end
+
+  def test_create_associate_when_adding_to_has_many_through
+    count = posts(:thinking).tags.count
+    push = Tag.create!(:name => 'pushme')
+    post_thinking = posts(:thinking)
+    assert_nothing_raised { post_thinking.tags << push }
+    assert_nil( wrong = post_thinking.tags.detect { |t| t.class != Tag },
+                message = "Expected a Tag in tags collection, got #{wrong.class}.")
+    assert_nil( wrong = post_thinking.taggings.detect { |t| t.class != Tagging },
+                message = "Expected a Tagging in taggings collection, got #{wrong.class}.")
+    assert_equal(count + 1, post_thinking.tags.size)
+    assert_equal(count + 1, post_thinking.tags(true).size)
+
+    assert_kind_of Tag, post_thinking.tags.create!(:name => 'foo')
+    assert_nil( wrong = post_thinking.tags.detect { |t| t.class != Tag },
+                message = "Expected a Tag in tags collection, got #{wrong.class}.")
+    assert_nil( wrong = post_thinking.taggings.detect { |t| t.class != Tagging },
+                message = "Expected a Tagging in taggings collection, got #{wrong.class}.")
+    assert_equal(count + 2, post_thinking.tags.size)
+    assert_equal(count + 2, post_thinking.tags(true).size)
+
+    assert_nothing_raised { post_thinking.tags.concat(Tag.create!(:name => 'abc'), Tag.create!(:name => 'def')) }
+    assert_nil( wrong = post_thinking.tags.detect { |t| t.class != Tag },
+                message = "Expected a Tag in tags collection, got #{wrong.class}.")
+    assert_nil( wrong = post_thinking.taggings.detect { |t| t.class != Tagging },
+                message = "Expected a Tagging in taggings collection, got #{wrong.class}.")
+    assert_equal(count + 4, post_thinking.tags.size)
+    assert_equal(count + 4, post_thinking.tags(true).size)
+
+    # Raises if the wrong reflection name is used to set the Edge belongs_to
+    assert_nothing_raised { vertices(:vertex_1).sinks << vertices(:vertex_5) }
+  end
+
+  def test_has_many_through_collection_size_doesnt_load_target_if_not_loaded
+    author = authors(:david)
+    assert_equal 9, author.comments.size
+    assert !author.comments.loaded?
+  end
+
+  def test_has_many_through_collection_size_uses_counter_cache_if_it_exists
+    author = authors(:david)
+    author.stubs(:read_attribute).with('comments_count').returns(100)
+    assert_equal 100, author.comments.size
+    assert !author.comments.loaded?
+  end
+
+  def test_adding_junk_to_has_many_through_should_raise_type_mismatch
+    assert_raise(ActiveRecord::AssociationTypeMismatch) { posts(:thinking).tags << "Uhh what now?" }
+  end
+
+  def test_adding_to_has_many_through_should_return_self
+    tags = posts(:thinking).tags
+    assert_equal tags, posts(:thinking).tags.push(tags(:general))
+  end
+
+  def test_delete_associate_when_deleting_from_has_many_through_with_nonstandard_id
+    count = books(:awdr).references.count
+    references_before = books(:awdr).references
+    book = Book.create!(:name => 'Getting Real')
+    book_awdr = books(:awdr)
+    book_awdr.references << book
+    assert_equal(count + 1, book_awdr.references(true).size)
+
+    assert_nothing_raised { book_awdr.references.delete(book) }
+    assert_equal(count, book_awdr.references.size)
+    assert_equal(count, book_awdr.references(true).size)
+    assert_equal(references_before.sort, book_awdr.references.sort)
+  end
+
+  def test_delete_associate_when_deleting_from_has_many_through
+    count = posts(:thinking).tags.count
+    tags_before = posts(:thinking).tags
+    tag = Tag.create!(:name => 'doomed')
+    post_thinking = posts(:thinking)
+    post_thinking.tags << tag
+    assert_equal(count + 1, post_thinking.taggings(true).size)
+    assert_equal(count + 1, post_thinking.tags(true).size)
+
+    assert_nothing_raised { post_thinking.tags.delete(tag) }
+    assert_equal(count, post_thinking.tags.size)
+    assert_equal(count, post_thinking.tags(true).size)
+    assert_equal(count, post_thinking.taggings(true).size)
+    assert_equal(tags_before.sort, post_thinking.tags.sort)
+  end
+
+  def test_delete_associate_when_deleting_from_has_many_through_with_multiple_tags
+    count = posts(:thinking).tags.count
+    tags_before = posts(:thinking).tags
+    doomed = Tag.create!(:name => 'doomed')
+    doomed2 = Tag.create!(:name => 'doomed2')
+    quaked = Tag.create!(:name => 'quaked')
+    post_thinking = posts(:thinking)
+    post_thinking.tags << doomed << doomed2
+    assert_equal(count + 2, post_thinking.tags(true).size)
+
+    assert_nothing_raised { post_thinking.tags.delete(doomed, doomed2, quaked) }
+    assert_equal(count, post_thinking.tags.size)
+    assert_equal(count, post_thinking.tags(true).size)
+    assert_equal(tags_before.sort, post_thinking.tags.sort)
+  end
+
+  def test_deleting_junk_from_has_many_through_should_raise_type_mismatch
+    assert_raise(ActiveRecord::AssociationTypeMismatch) { posts(:thinking).tags.delete("Uhh what now?") }
+  end
+
+  def test_has_many_through_sum_uses_calculations
+    assert_nothing_raised { authors(:david).comments.sum(:post_id) }
+  end
+
+  def test_calculations_on_has_many_through_should_disambiguate_fields
+    assert_nothing_raised { authors(:david).categories.maximum(:id) }
+  end
+  
+  def test_calculations_on_has_many_through_should_not_disambiguate_fields_unless_necessary
+    assert_nothing_raised { authors(:david).categories.maximum("categories.id") }
+  end
+
+  def test_has_many_through_has_many_with_sti
+    assert_equal [comments(:does_it_hurt)], authors(:david).special_post_comments
+  end
+
+  def test_uniq_has_many_through_should_retain_order
+    comment_ids = authors(:david).comments.map(&:id)
+    assert_equal comment_ids.sort, authors(:david).ordered_uniq_comments.map(&:id)
+    assert_equal comment_ids.sort.reverse, authors(:david).ordered_uniq_comments_desc.map(&:id)
+  end
+
+  def test_polymorphic_has_many
+    expected = taggings(:welcome_general)
+    p = Post.find(posts(:welcome).id, :include => :taggings)
+    assert_no_queries {assert p.taggings.include?(expected)}
+    assert posts(:welcome).taggings.include?(taggings(:welcome_general))
+  end
+
+  def test_polymorphic_has_one
+    expected = posts(:welcome)
+
+    tagging  = Tagging.find(taggings(:welcome_general).id, :include => :taggable)
+    assert_no_queries { assert_equal expected, tagging.taggable}
+  end
+
+  def test_polymorphic_belongs_to
+    p = Post.find(posts(:welcome).id, :include => {:taggings => :taggable})
+    assert_no_queries {assert_equal posts(:welcome), p.taggings.first.taggable}
+  end
+
+  def test_preload_polymorphic_has_many_through
+    posts           = Post.find(:all, :order => 'posts.id')
+    posts_with_tags = Post.find(:all, :include => :tags, :order => 'posts.id')
+    assert_equal posts.length, posts_with_tags.length
+    posts.length.times do |i|
+      assert_equal posts[i].tags.length, assert_no_queries { posts_with_tags[i].tags.length }
+    end
+  end
+
+  def test_preload_polymorph_many_types
+    taggings = Tagging.find :all, :include => :taggable, :conditions => ['taggable_type != ?', 'FakeModel']
+    assert_no_queries do
+      taggings.first.taggable.id
+      taggings[1].taggable.id
+    end
+
+    taggables = taggings.map(&:taggable)
+    assert taggables.include?(items(:dvd))
+    assert taggables.include?(posts(:welcome))
+  end
+
+  def test_preload_nil_polymorphic_belongs_to
+    assert_nothing_raised do
+      taggings = Tagging.find(:all, :include => :taggable, :conditions => ['taggable_type IS NULL'])
+    end
+  end
+
+  def test_preload_polymorphic_has_many
+    posts               = Post.find(:all, :order => 'posts.id')
+    posts_with_taggings = Post.find(:all, :include => :taggings, :order => 'posts.id')
+    assert_equal posts.length, posts_with_taggings.length
+    posts.length.times do |i|
+      assert_equal posts[i].taggings.length, assert_no_queries { posts_with_taggings[i].taggings.length }
+    end
+  end
+
+  def test_belongs_to_shared_parent
+    comments = Comment.find(:all, :include => :post, :conditions => 'post_id = 1')
+    assert_no_queries do
+      assert_equal comments.first.post, comments[1].post
+    end
+  end
+
+  def test_has_many_through_include_uses_array_include_after_loaded
+    david = authors(:david)
+    david.categories.class # force load target
+
+    category = david.categories.first
+
+    assert_no_queries do
+      assert david.categories.loaded?
+      assert david.categories.include?(category)
+    end
+  end
+
+  def test_has_many_through_include_checks_if_record_exists_if_target_not_loaded
+    david = authors(:david)
+    category = david.categories.first
+
+    david.reload
+    assert ! david.categories.loaded?
+    assert_queries(1) do
+      assert david.categories.include?(category)
+    end
+    assert ! david.categories.loaded?
+  end
+  
+  def test_has_many_through_include_returns_false_for_non_matching_record_to_verify_scoping
+    david = authors(:david)
+    category = Category.create!(:name => 'Not Associated')
+
+    assert ! david.categories.loaded?
+    assert ! david.categories.include?(category)
+  end
+
+  def test_has_many_through_goes_through_all_sti_classes
+    sub_sti_post = SubStiPost.create!(:title => 'test', :body => 'test', :author_id => 1)
+    new_comment = sub_sti_post.comments.create(:body => 'test')
+
+    assert_equal [9, 10, new_comment.id], authors(:david).sti_post_comments.map(&:id).sort
+  end
+
+  private
+    # create dynamic Post models to allow different dependency options
+    def find_post_with_dependency(post_id, association, association_name, dependency)
+      class_name = "PostWith#{association.to_s.classify}#{dependency.to_s.classify}"
+      Post.find(post_id).update_attribute :type, class_name
+      klass = Object.const_set(class_name, Class.new(ActiveRecord::Base))
+      klass.set_table_name 'posts'
+      klass.send(association, association_name, :as => :taggable, :dependent => dependency)
+      klass.find(post_id)
+    end
+end