Merged updates from trunk into stable branch
[feedcatcher.git] / vendor / rails / activerecord / test / cases / autosave_association_test.rb
diff --git a/vendor/rails/activerecord/test/cases/autosave_association_test.rb b/vendor/rails/activerecord/test/cases/autosave_association_test.rb
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+require 'cases/helper'
+require 'models/bird'
+require 'models/company'
+require 'models/customer'
+require 'models/developer'
+require 'models/order'
+require 'models/parrot'
+require 'models/person'
+require 'models/pirate'
+require 'models/post'
+require 'models/reader'
+require 'models/ship'
+require 'models/ship_part'
+require 'models/treasure'
+
+class TestAutosaveAssociationsInGeneral < ActiveRecord::TestCase
+  def test_autosave_should_be_a_valid_option_for_has_one
+    assert base.valid_keys_for_has_one_association.include?(:autosave)
+  end
+
+  def test_autosave_should_be_a_valid_option_for_belongs_to
+    assert base.valid_keys_for_belongs_to_association.include?(:autosave)
+  end
+
+  def test_autosave_should_be_a_valid_option_for_has_many
+    assert base.valid_keys_for_has_many_association.include?(:autosave)
+  end
+
+  def test_autosave_should_be_a_valid_option_for_has_and_belongs_to_many
+    assert base.valid_keys_for_has_and_belongs_to_many_association.include?(:autosave)
+  end
+
+  private
+
+  def base
+    ActiveRecord::Base
+  end
+end
+
+class TestDefaultAutosaveAssociationOnAHasOneAssociation < ActiveRecord::TestCase
+  def test_save_fails_for_invalid_has_one
+    firm = Firm.find(:first)
+    assert firm.valid?
+
+    firm.account = Account.new
+
+    assert !firm.account.valid?
+    assert !firm.valid?
+    assert !firm.save
+    assert_equal "is invalid", firm.errors.on("account")
+  end
+
+  def test_save_succeeds_for_invalid_has_one_with_validate_false
+    firm = Firm.find(:first)
+    assert firm.valid?
+
+    firm.unvalidated_account = Account.new
+
+    assert !firm.unvalidated_account.valid?
+    assert firm.valid?
+    assert firm.save
+  end
+
+  def test_build_before_child_saved
+    firm = Firm.find(1)
+
+    account = firm.account.build("credit_limit" => 1000)
+    assert_equal account, firm.account
+    assert account.new_record?
+    assert firm.save
+    assert_equal account, firm.account
+    assert !account.new_record?
+  end
+
+  def test_build_before_either_saved
+    firm = Firm.new("name" => "GlobalMegaCorp")
+
+    firm.account = account = Account.new("credit_limit" => 1000)
+    assert_equal account, firm.account
+    assert account.new_record?
+    assert firm.save
+    assert_equal account, firm.account
+    assert !account.new_record?
+  end
+
+  def test_assignment_before_parent_saved
+    firm = Firm.new("name" => "GlobalMegaCorp")
+    firm.account = a = Account.find(1)
+    assert firm.new_record?
+    assert_equal a, firm.account
+    assert firm.save
+    assert_equal a, firm.account
+    assert_equal a, firm.account(true)
+  end
+
+  def test_assignment_before_either_saved
+    firm = Firm.new("name" => "GlobalMegaCorp")
+    firm.account = a = Account.new("credit_limit" => 1000)
+    assert firm.new_record?
+    assert a.new_record?
+    assert_equal a, firm.account
+    assert firm.save
+    assert !firm.new_record?
+    assert !a.new_record?
+    assert_equal a, firm.account
+    assert_equal a, firm.account(true)
+  end
+
+  def test_not_resaved_when_unchanged
+    firm = Firm.find(:first, :include => :account)
+    firm.name += '-changed'
+    assert_queries(1) { firm.save! }
+
+    firm = Firm.find(:first)
+    firm.account = Account.find(:first)
+    assert_queries(Firm.partial_updates? ? 0 : 1) { firm.save! }
+
+    firm = Firm.find(:first).clone
+    firm.account = Account.find(:first)
+    assert_queries(2) { firm.save! }
+
+    firm = Firm.find(:first).clone
+    firm.account = Account.find(:first).clone
+    assert_queries(2) { firm.save! }
+  end
+end
+
+class TestDefaultAutosaveAssociationOnABelongsToAssociation < ActiveRecord::TestCase
+  def test_save_fails_for_invalid_belongs_to
+    assert log = AuditLog.create(:developer_id => 0, :message => "")
+
+    log.developer = Developer.new
+    assert !log.developer.valid?
+    assert !log.valid?
+    assert !log.save
+    assert_equal "is invalid", log.errors.on("developer")
+  end
+
+  def test_save_succeeds_for_invalid_belongs_to_with_validate_false
+    assert log = AuditLog.create(:developer_id => 0, :message=> "")
+
+    log.unvalidated_developer = Developer.new
+    assert !log.unvalidated_developer.valid?
+    assert log.valid?
+    assert log.save
+  end
+
+  def test_assignment_before_parent_saved
+    client = Client.find(:first)
+    apple = Firm.new("name" => "Apple")
+    client.firm = apple
+    assert_equal apple, client.firm
+    assert apple.new_record?
+    assert client.save
+    assert apple.save
+    assert !apple.new_record?
+    assert_equal apple, client.firm
+    assert_equal apple, client.firm(true)
+  end
+
+  def test_assignment_before_either_saved
+    final_cut = Client.new("name" => "Final Cut")
+    apple = Firm.new("name" => "Apple")
+    final_cut.firm = apple
+    assert final_cut.new_record?
+    assert apple.new_record?
+    assert final_cut.save
+    assert !final_cut.new_record?
+    assert !apple.new_record?
+    assert_equal apple, final_cut.firm
+    assert_equal apple, final_cut.firm(true)
+  end
+
+  def test_store_two_association_with_one_save
+    num_orders = Order.count
+    num_customers = Customer.count
+    order = Order.new
+
+    customer1 = order.billing = Customer.new
+    customer2 = order.shipping = Customer.new
+    assert order.save
+    assert_equal customer1, order.billing
+    assert_equal customer2, order.shipping
+
+    order.reload
+
+    assert_equal customer1, order.billing
+    assert_equal customer2, order.shipping
+
+    assert_equal num_orders +1, Order.count
+    assert_equal num_customers +2, Customer.count
+  end
+
+  def test_store_association_in_two_relations_with_one_save
+    num_orders = Order.count
+    num_customers = Customer.count
+    order = Order.new
+
+    customer = order.billing = order.shipping = Customer.new
+    assert order.save
+    assert_equal customer, order.billing
+    assert_equal customer, order.shipping
+
+    order.reload
+
+    assert_equal customer, order.billing
+    assert_equal customer, order.shipping
+
+    assert_equal num_orders +1, Order.count
+    assert_equal num_customers +1, Customer.count
+  end
+
+  def test_store_association_in_two_relations_with_one_save_in_existing_object
+    num_orders = Order.count
+    num_customers = Customer.count
+    order = Order.create
+
+    customer = order.billing = order.shipping = Customer.new
+    assert order.save
+    assert_equal customer, order.billing
+    assert_equal customer, order.shipping
+
+    order.reload
+
+    assert_equal customer, order.billing
+    assert_equal customer, order.shipping
+
+    assert_equal num_orders +1, Order.count
+    assert_equal num_customers +1, Customer.count
+  end
+
+  def test_store_association_in_two_relations_with_one_save_in_existing_object_with_values
+    num_orders = Order.count
+    num_customers = Customer.count
+    order = Order.create
+
+    customer = order.billing = order.shipping = Customer.new
+    assert order.save
+    assert_equal customer, order.billing
+    assert_equal customer, order.shipping
+
+    order.reload
+
+    customer = order.billing = order.shipping = Customer.new
+
+    assert order.save
+    order.reload
+
+    assert_equal customer, order.billing
+    assert_equal customer, order.shipping
+
+    assert_equal num_orders +1, Order.count
+    assert_equal num_customers +2, Customer.count
+  end
+end
+
+class TestDefaultAutosaveAssociationOnAHasManyAssociation < ActiveRecord::TestCase
+  fixtures :companies, :people
+
+  def test_invalid_adding
+    firm = Firm.find(1)
+    assert !(firm.clients_of_firm << c = Client.new)
+    assert c.new_record?
+    assert !firm.valid?
+    assert !firm.save
+    assert c.new_record?
+  end
+
+  def test_invalid_adding_before_save
+    no_of_firms = Firm.count
+    no_of_clients = Client.count
+    new_firm = Firm.new("name" => "A New Firm, Inc")
+    new_firm.clients_of_firm.concat([c = Client.new, Client.new("name" => "Apple")])
+    assert c.new_record?
+    assert !c.valid?
+    assert !new_firm.valid?
+    assert !new_firm.save
+    assert c.new_record?
+    assert new_firm.new_record?
+  end
+
+  def test_invalid_adding_with_validate_false
+    firm = Firm.find(:first)
+    client = Client.new
+    firm.unvalidated_clients_of_firm << client
+
+    assert firm.valid?
+    assert !client.valid?
+    assert firm.save
+    assert client.new_record?
+  end
+
+  def test_valid_adding_with_validate_false
+    no_of_clients = Client.count
+
+    firm = Firm.find(:first)
+    client = Client.new("name" => "Apple")
+
+    assert firm.valid?
+    assert client.valid?
+    assert client.new_record?
+
+    firm.unvalidated_clients_of_firm << client
+
+    assert firm.save
+    assert !client.new_record?
+    assert_equal no_of_clients+1, Client.count
+  end
+
+  def test_invalid_build
+    new_client = companies(:first_firm).clients_of_firm.build
+    assert new_client.new_record?
+    assert !new_client.valid?
+    assert_equal new_client, companies(:first_firm).clients_of_firm.last
+    assert !companies(:first_firm).save
+    assert new_client.new_record?
+    assert_equal 1, companies(:first_firm).clients_of_firm(true).size
+  end
+
+  def test_adding_before_save
+    no_of_firms = Firm.count
+    no_of_clients = Client.count
+
+    new_firm = Firm.new("name" => "A New Firm, Inc")
+    c = Client.new("name" => "Apple")
+
+    new_firm.clients_of_firm.push Client.new("name" => "Natural Company")
+    assert_equal 1, new_firm.clients_of_firm.size
+    new_firm.clients_of_firm << c
+    assert_equal 2, new_firm.clients_of_firm.size
+
+    assert_equal no_of_firms, Firm.count      # Firm was not saved to database.
+    assert_equal no_of_clients, Client.count  # Clients were not saved to database.
+    assert new_firm.save
+    assert !new_firm.new_record?
+    assert !c.new_record?
+    assert_equal new_firm, c.firm
+    assert_equal no_of_firms+1, Firm.count      # Firm was saved to database.
+    assert_equal no_of_clients+2, Client.count  # Clients were saved to database.
+
+    assert_equal 2, new_firm.clients_of_firm.size
+    assert_equal 2, new_firm.clients_of_firm(true).size
+  end
+
+  def test_assign_ids
+    firm = Firm.new("name" => "Apple")
+    firm.client_ids = [companies(:first_client).id, companies(:second_client).id]
+    firm.save
+    firm.reload
+    assert_equal 2, firm.clients.length
+    assert firm.clients.include?(companies(:second_client))
+  end
+
+  def test_assign_ids_for_through_a_belongs_to
+    post = Post.new(:title => "Assigning IDs works!", :body => "You heared it here first, folks!")
+    post.person_ids = [people(:david).id, people(:michael).id]
+    post.save
+    post.reload
+    assert_equal 2, post.people.length
+    assert post.people.include?(people(:david))
+  end
+
+  def test_build_before_save
+    company = companies(:first_firm)
+    new_client = assert_no_queries { company.clients_of_firm.build("name" => "Another Client") }
+    assert !company.clients_of_firm.loaded?
+
+    company.name += '-changed'
+    assert_queries(2) { assert company.save }
+    assert !new_client.new_record?
+    assert_equal 2, company.clients_of_firm(true).size
+  end
+
+  def test_build_many_before_save
+    company = companies(:first_firm)
+    new_clients = assert_no_queries { company.clients_of_firm.build([{"name" => "Another Client"}, {"name" => "Another Client II"}]) }
+
+    company.name += '-changed'
+    assert_queries(3) { assert company.save }
+    assert_equal 3, company.clients_of_firm(true).size
+  end
+
+  def test_build_via_block_before_save
+    company = companies(:first_firm)
+    new_client = assert_no_queries { company.clients_of_firm.build {|client| client.name = "Another Client" } }
+    assert !company.clients_of_firm.loaded?
+
+    company.name += '-changed'
+    assert_queries(2) { assert company.save }
+    assert !new_client.new_record?
+    assert_equal 2, company.clients_of_firm(true).size
+  end
+
+  def test_build_many_via_block_before_save
+    company = companies(:first_firm)
+    new_clients = assert_no_queries do
+      company.clients_of_firm.build([{"name" => "Another Client"}, {"name" => "Another Client II"}]) do |client|
+        client.name = "changed"
+      end
+    end
+
+    company.name += '-changed'
+    assert_queries(3) { assert company.save }
+    assert_equal 3, company.clients_of_firm(true).size
+  end
+
+  def test_replace_on_new_object
+    firm = Firm.new("name" => "New Firm")
+    firm.clients = [companies(:second_client), Client.new("name" => "New Client")]
+    assert firm.save
+    firm.reload
+    assert_equal 2, firm.clients.length
+    assert firm.clients.include?(Client.find_by_name("New Client"))
+  end
+end
+
+class TestDestroyAsPartOfAutosaveAssociation < ActiveRecord::TestCase
+  self.use_transactional_fixtures = false
+
+  def setup
+    @pirate = Pirate.create(:catchphrase => "Don' botharrr talkin' like one, savvy?")
+    @ship = @pirate.create_ship(:name => 'Nights Dirty Lightning')
+  end
+
+  # reload
+  def test_a_marked_for_destruction_record_should_not_be_be_marked_after_reload
+    @pirate.mark_for_destruction
+    @pirate.ship.mark_for_destruction
+
+    assert !@pirate.reload.marked_for_destruction?
+    assert !@pirate.ship.marked_for_destruction?
+  end
+
+  # has_one
+  def test_should_destroy_a_child_association_as_part_of_the_save_transaction_if_it_was_marked_for_destroyal
+    assert !@pirate.ship.marked_for_destruction?
+
+    @pirate.ship.mark_for_destruction
+    id = @pirate.ship.id
+
+    assert @pirate.ship.marked_for_destruction?
+    assert Ship.find_by_id(id)
+
+    @pirate.save
+    assert_nil @pirate.reload.ship
+    assert_nil Ship.find_by_id(id)
+  end
+
+  def test_should_skip_validation_on_a_child_association_if_marked_for_destruction
+    @pirate.ship.name = ''
+    assert !@pirate.valid?
+
+    @pirate.ship.mark_for_destruction
+    assert_difference('Ship.count', -1) { @pirate.save! }
+  end
+
+  def test_should_rollback_destructions_if_an_exception_occurred_while_saving_a_child
+    # Stub the save method of the @pirate.ship instance to destroy and then raise an exception
+    class << @pirate.ship
+      def save(*args)
+        super
+        destroy
+        raise 'Oh noes!'
+      end
+    end
+
+    assert_raise(RuntimeError) { assert !@pirate.save }
+    assert_not_nil @pirate.reload.ship
+  end
+
+  # belongs_to
+  def test_should_destroy_a_parent_association_as_part_of_the_save_transaction_if_it_was_marked_for_destroyal
+    assert !@ship.pirate.marked_for_destruction?
+
+    @ship.pirate.mark_for_destruction
+    id = @ship.pirate.id
+
+    assert @ship.pirate.marked_for_destruction?
+    assert Pirate.find_by_id(id)
+
+    @ship.save
+    assert_nil @ship.reload.pirate
+    assert_nil Pirate.find_by_id(id)
+  end
+
+  def test_should_skip_validation_on_a_parent_association_if_marked_for_destruction
+    @ship.pirate.catchphrase = ''
+    assert !@ship.valid?
+
+    @ship.pirate.mark_for_destruction
+    assert_difference('Pirate.count', -1) { @ship.save! }
+  end
+
+  def test_should_rollback_destructions_if_an_exception_occurred_while_saving_a_parent
+    # Stub the save method of the @ship.pirate instance to destroy and then raise an exception
+    class << @ship.pirate
+      def save(*args)
+        super
+        destroy
+        raise 'Oh noes!'
+      end
+    end
+
+    assert_raise(RuntimeError) { assert !@ship.save }
+    assert_not_nil @ship.reload.pirate
+  end
+
+  # has_many & has_and_belongs_to
+  %w{ parrots birds }.each do |association_name|
+    define_method("test_should_destroy_#{association_name}_as_part_of_the_save_transaction_if_they_were_marked_for_destroyal") do
+      2.times { |i| @pirate.send(association_name).create!(:name => "#{association_name}_#{i}") }
+
+      assert !@pirate.send(association_name).any? { |child| child.marked_for_destruction? }
+
+      @pirate.send(association_name).each { |child| child.mark_for_destruction }
+      klass = @pirate.send(association_name).first.class
+      ids = @pirate.send(association_name).map(&:id)
+
+      assert @pirate.send(association_name).all? { |child| child.marked_for_destruction? }
+      ids.each { |id| assert klass.find_by_id(id) }
+
+      @pirate.save
+      assert @pirate.reload.send(association_name).empty?
+      ids.each { |id| assert_nil klass.find_by_id(id) }
+    end
+
+    define_method("test_should_skip_validation_on_the_#{association_name}_association_if_marked_for_destruction") do
+      2.times { |i| @pirate.send(association_name).create!(:name => "#{association_name}_#{i}") }
+      children = @pirate.send(association_name)
+
+      children.each { |child| child.name = '' }
+      assert !@pirate.valid?
+
+      children.each { |child| child.mark_for_destruction }
+      assert_difference("#{association_name.classify}.count", -2) { @pirate.save! }
+    end
+
+    define_method("test_should_rollback_destructions_if_an_exception_occurred_while_saving_#{association_name}") do
+      2.times { |i| @pirate.send(association_name).create!(:name => "#{association_name}_#{i}") }
+      before = @pirate.send(association_name).map { |c| c }
+
+      # Stub the save method of the first child to destroy and the second to raise an exception
+      class << before.first
+        def save(*args)
+          super
+          destroy
+        end
+      end
+      class << before.last
+        def save(*args)
+          super
+          raise 'Oh noes!'
+        end
+      end
+
+      assert_raise(RuntimeError) { assert !@pirate.save }
+      assert_equal before, @pirate.reload.send(association_name)
+    end
+
+    # Add and remove callbacks tests for association collections.
+    %w{ method proc }.each do |callback_type|
+      define_method("test_should_run_add_callback_#{callback_type}s_for_#{association_name}") do
+        association_name_with_callbacks = "#{association_name}_with_#{callback_type}_callbacks"
+
+        pirate = Pirate.new(:catchphrase => "Arr")
+        pirate.send(association_name_with_callbacks).build(:name => "Crowe the One-Eyed")
+
+        expected = [
+          "before_adding_#{callback_type}_#{association_name.singularize}_<new>",
+          "after_adding_#{callback_type}_#{association_name.singularize}_<new>"
+        ]
+
+        assert_equal expected, pirate.ship_log
+      end
+
+      define_method("test_should_run_remove_callback_#{callback_type}s_for_#{association_name}") do
+        association_name_with_callbacks = "#{association_name}_with_#{callback_type}_callbacks"
+
+        @pirate.send(association_name_with_callbacks).create!(:name => "Crowe the One-Eyed")
+        @pirate.send(association_name_with_callbacks).each { |c| c.mark_for_destruction }
+        child_id = @pirate.send(association_name_with_callbacks).first.id
+
+        @pirate.ship_log.clear
+        @pirate.save
+
+        expected = [
+          "before_removing_#{callback_type}_#{association_name.singularize}_#{child_id}",
+          "after_removing_#{callback_type}_#{association_name.singularize}_#{child_id}"
+        ]
+
+        assert_equal expected, @pirate.ship_log
+      end
+    end
+  end
+end
+
+class TestAutosaveAssociationOnAHasOneAssociation < ActiveRecord::TestCase
+  self.use_transactional_fixtures = false
+
+  def setup
+    @pirate = Pirate.create(:catchphrase => "Don' botharrr talkin' like one, savvy?")
+    @ship = @pirate.create_ship(:name => 'Nights Dirty Lightning')
+  end
+
+  def test_should_still_work_without_an_associated_model
+    @ship.destroy
+    @pirate.reload.catchphrase = "Arr"
+    @pirate.save
+    assert 'Arr', @pirate.reload.catchphrase
+  end
+
+  def test_should_automatically_save_the_associated_model
+    @pirate.ship.name = 'The Vile Insanity'
+    @pirate.save
+    assert_equal 'The Vile Insanity', @pirate.reload.ship.name
+  end
+
+  def test_should_automatically_save_bang_the_associated_model
+    @pirate.ship.name = 'The Vile Insanity'
+    @pirate.save!
+    assert_equal 'The Vile Insanity', @pirate.reload.ship.name
+  end
+
+  def test_should_automatically_validate_the_associated_model
+    @pirate.ship.name = ''
+    assert !@pirate.valid?
+    assert !@pirate.errors.on(:ship_name).blank?
+  end
+
+  def test_should_merge_errors_on_the_associated_models_onto_the_parent_even_if_it_is_not_valid
+    @pirate.ship.name   = nil
+    @pirate.catchphrase = nil
+    assert !@pirate.valid?
+    assert !@pirate.errors.on(:ship_name).blank?
+    assert !@pirate.errors.on(:catchphrase).blank?
+  end
+
+  def test_should_still_allow_to_bypass_validations_on_the_associated_model
+    @pirate.catchphrase = ''
+    @pirate.ship.name = ''
+    @pirate.save(false)
+    assert_equal ['', ''], [@pirate.reload.catchphrase, @pirate.ship.name]
+  end
+
+  def test_should_allow_to_bypass_validations_on_associated_models_at_any_depth
+    2.times { |i| @pirate.ship.parts.create!(:name => "part #{i}") }
+
+    @pirate.catchphrase = ''
+    @pirate.ship.name = ''
+    @pirate.ship.parts.each { |part| part.name = '' }
+    @pirate.save(false)
+
+    values = [@pirate.reload.catchphrase, @pirate.ship.name, *@pirate.ship.parts.map(&:name)]
+    assert_equal ['', '', '', ''], values
+  end
+
+  def test_should_still_raise_an_ActiveRecordRecord_Invalid_exception_if_we_want_that
+    @pirate.ship.name = ''
+    assert_raise(ActiveRecord::RecordInvalid) do
+      @pirate.save!
+    end
+  end
+
+  def test_should_rollback_any_changes_if_an_exception_occurred_while_saving
+    before = [@pirate.catchphrase, @pirate.ship.name]
+
+    @pirate.catchphrase = 'Arr'
+    @pirate.ship.name = 'The Vile Insanity'
+
+    # Stub the save method of the @pirate.ship instance to raise an exception
+    class << @pirate.ship
+      def save(*args)
+        super
+        raise 'Oh noes!'
+      end
+    end
+
+    assert_raise(RuntimeError) { assert !@pirate.save }
+    assert_equal before, [@pirate.reload.catchphrase, @pirate.ship.name]
+  end
+
+  def test_should_not_load_the_associated_model
+    assert_queries(1) { @pirate.catchphrase = 'Arr'; @pirate.save! }
+  end
+end
+
+class TestAutosaveAssociationOnABelongsToAssociation < ActiveRecord::TestCase
+  self.use_transactional_fixtures = false
+
+  def setup
+    @ship = Ship.create(:name => 'Nights Dirty Lightning')
+    @pirate = @ship.create_pirate(:catchphrase => "Don' botharrr talkin' like one, savvy?")
+  end
+
+  def test_should_still_work_without_an_associated_model
+    @pirate.destroy
+    @ship.reload.name = "The Vile Insanity"
+    @ship.save
+    assert 'The Vile Insanity', @ship.reload.name
+  end
+
+  def test_should_automatically_save_the_associated_model
+    @ship.pirate.catchphrase = 'Arr'
+    @ship.save
+    assert_equal 'Arr', @ship.reload.pirate.catchphrase
+  end
+
+  def test_should_automatically_save_bang_the_associated_model
+    @ship.pirate.catchphrase = 'Arr'
+    @ship.save!
+    assert_equal 'Arr', @ship.reload.pirate.catchphrase
+  end
+
+  def test_should_automatically_validate_the_associated_model
+    @ship.pirate.catchphrase = ''
+    assert !@ship.valid?
+    assert !@ship.errors.on(:pirate_catchphrase).blank?
+  end
+
+  def test_should_merge_errors_on_the_associated_model_onto_the_parent_even_if_it_is_not_valid
+    @ship.name = nil
+    @ship.pirate.catchphrase = nil
+    assert !@ship.valid?
+    assert !@ship.errors.on(:name).blank?
+    assert !@ship.errors.on(:pirate_catchphrase).blank?
+  end
+
+  def test_should_still_allow_to_bypass_validations_on_the_associated_model
+    @ship.pirate.catchphrase = ''
+    @ship.name = ''
+    @ship.save(false)
+    assert_equal ['', ''], [@ship.reload.name, @ship.pirate.catchphrase]
+  end
+
+  def test_should_still_raise_an_ActiveRecordRecord_Invalid_exception_if_we_want_that
+    @ship.pirate.catchphrase = ''
+    assert_raise(ActiveRecord::RecordInvalid) do
+      @ship.save!
+    end
+  end
+
+  def test_should_rollback_any_changes_if_an_exception_occurred_while_saving
+    before = [@ship.pirate.catchphrase, @ship.name]
+
+    @ship.pirate.catchphrase = 'Arr'
+    @ship.name = 'The Vile Insanity'
+
+    # Stub the save method of the @ship.pirate instance to raise an exception
+    class << @ship.pirate
+      def save(*args)
+        super
+        raise 'Oh noes!'
+      end
+    end
+
+    assert_raise(RuntimeError) { assert !@ship.save }
+    # TODO: Why does using reload on @ship looses the associated pirate?
+    assert_equal before, [@ship.pirate.reload.catchphrase, @ship.reload.name]
+  end
+
+  def test_should_not_load_the_associated_model
+    assert_queries(1) { @ship.name = 'The Vile Insanity'; @ship.save! }
+  end
+end
+
+module AutosaveAssociationOnACollectionAssociationTests
+  def test_should_automatically_save_the_associated_models
+    new_names = ['Grace OMalley', 'Privateers Greed']
+    @pirate.send(@association_name).each_with_index { |child, i| child.name = new_names[i] }
+
+    @pirate.save
+    assert_equal new_names, @pirate.reload.send(@association_name).map(&:name)
+  end
+
+  def test_should_automatically_save_bang_the_associated_models
+    new_names = ['Grace OMalley', 'Privateers Greed']
+    @pirate.send(@association_name).each_with_index { |child, i| child.name = new_names[i] }
+
+    @pirate.save!
+    assert_equal new_names, @pirate.reload.send(@association_name).map(&:name)
+  end
+
+  def test_should_automatically_validate_the_associated_models
+    @pirate.send(@association_name).each { |child| child.name = '' }
+
+    assert !@pirate.valid?
+    assert_equal "can't be blank", @pirate.errors.on("#{@association_name}_name")
+    assert @pirate.errors.on(@association_name).blank?
+  end
+
+  def test_should_not_use_default_invalid_error_on_associated_models
+    @pirate.send(@association_name).build(:name => '')
+
+    assert !@pirate.valid?
+    assert_equal "can't be blank", @pirate.errors.on("#{@association_name}_name")
+    assert @pirate.errors.on(@association_name).blank?
+  end
+
+  def test_should_merge_errors_on_the_associated_models_onto_the_parent_even_if_it_is_not_valid
+    @pirate.send(@association_name).each { |child| child.name = '' }
+    @pirate.catchphrase = nil
+
+    assert !@pirate.valid?
+    assert_equal "can't be blank", @pirate.errors.on("#{@association_name}_name")
+    assert !@pirate.errors.on(:catchphrase).blank?
+  end
+
+  def test_should_allow_to_bypass_validations_on_the_associated_models_on_update
+    @pirate.catchphrase = ''
+    @pirate.send(@association_name).each { |child| child.name = '' }
+
+    assert @pirate.save(false)
+    assert_equal ['', '', ''], [
+      @pirate.reload.catchphrase,
+      @pirate.send(@association_name).first.name,
+      @pirate.send(@association_name).last.name
+    ]
+  end
+
+  def test_should_validation_the_associated_models_on_create
+    assert_no_difference("#{ @association_name == :birds ? 'Bird' : 'Parrot' }.count") do
+      2.times { @pirate.send(@association_name).build }
+      @pirate.save(true)
+    end
+  end
+
+  def test_should_allow_to_bypass_validations_on_the_associated_models_on_create
+    assert_difference("#{ @association_name == :birds ? 'Bird' : 'Parrot' }.count", +2) do
+      2.times { @pirate.send(@association_name).build }
+      @pirate.save(false)
+    end
+  end
+
+  def test_should_rollback_any_changes_if_an_exception_occurred_while_saving
+    before = [@pirate.catchphrase, *@pirate.send(@association_name).map(&:name)]
+    new_names = ['Grace OMalley', 'Privateers Greed']
+
+    @pirate.catchphrase = 'Arr'
+    @pirate.send(@association_name).each_with_index { |child, i| child.name = new_names[i] }
+
+    # Stub the save method of the first child instance to raise an exception
+    class << @pirate.send(@association_name).first
+      def save(*args)
+        super
+        raise 'Oh noes!'
+      end
+    end
+
+    assert_raise(RuntimeError) { assert !@pirate.save }
+    assert_equal before, [@pirate.reload.catchphrase, *@pirate.send(@association_name).map(&:name)]
+  end
+
+  def test_should_still_raise_an_ActiveRecordRecord_Invalid_exception_if_we_want_that
+    @pirate.send(@association_name).each { |child| child.name = '' }
+    assert_raise(ActiveRecord::RecordInvalid) do
+      @pirate.save!
+    end
+  end
+
+  def test_should_not_load_the_associated_models_if_they_were_not_loaded_yet
+    assert_queries(1) { @pirate.catchphrase = 'Arr'; @pirate.save! }
+
+    @pirate.send(@association_name).class # hack to load the target
+
+    assert_queries(3) do
+      @pirate.catchphrase = 'Yarr'
+      new_names = ['Grace OMalley', 'Privateers Greed']
+      @pirate.send(@association_name).each_with_index { |child, i| child.name = new_names[i] }
+      @pirate.save!
+    end
+  end
+end
+
+class TestAutosaveAssociationOnAHasManyAssociation < ActiveRecord::TestCase
+  self.use_transactional_fixtures = false
+
+  def setup
+    @association_name = :birds
+
+    @pirate = Pirate.create(:catchphrase => "Don' botharrr talkin' like one, savvy?")
+    @child_1 = @pirate.birds.create(:name => 'Posideons Killer')
+    @child_2 = @pirate.birds.create(:name => 'Killer bandita Dionne')
+  end
+
+  include AutosaveAssociationOnACollectionAssociationTests
+end
+
+class TestAutosaveAssociationOnAHasAndBelongsToManyAssociation < ActiveRecord::TestCase
+  self.use_transactional_fixtures = false
+
+  def setup
+    @association_name = :parrots
+    @habtm = true
+
+    @pirate = Pirate.create(:catchphrase => "Don' botharrr talkin' like one, savvy?")
+    @child_1 = @pirate.parrots.create(:name => 'Posideons Killer')
+    @child_2 = @pirate.parrots.create(:name => 'Killer bandita Dionne')
+  end
+
+  include AutosaveAssociationOnACollectionAssociationTests
+end
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