require 'abstract_unit' require 'fixtures/topic' class TransactionTest < Test::Unit::TestCase def setup @topics = create_fixtures "topics" @first, @second = Topic.find(1, 2) end def test_successful Topic.transaction do @first.approved = 1 @second.approved = 0 @first.save @second.save end assert Topic.find(1).approved?, "First should have been approved" assert !Topic.find(2).approved?, "Second should have been unapproved" end def test_successful_with_instance_method @first.transaction do @first.approved = 1 @second.approved = 0 @first.save @second.save end assert Topic.find(1).approved?, "First should have been approved" assert !Topic.find(2).approved?, "Second should have been unapproved" end def test_failing_on_exception begin Topic.transaction do @first.approved = true @second.approved = false @first.save @second.save raise "Bad things!" end rescue # caught it end assert @first.approved?, "First should still be changed in the objects" assert !@second.approved?, "Second should still be changed in the objects" assert !Topic.find(1).approved?, "First shouldn't have been approved" assert Topic.find(2).approved?, "Second should still be approved" end def test_failing_with_object_rollback begin Topic.transaction(@first, @second) do @first.approved = true @second.approved = false @first.save @second.save raise "Bad things!" end rescue # caught it end assert !@first.approved?, "First shouldn't have been approved" assert @second.approved?, "Second should still be approved" end def test_callback_rollback_in_save add_exception_raising_after_save_callback_to_topic begin @first.approved = true @first.save flunk rescue => e assert_equal "Make the transaction rollback", e.message assert !Topic.find(1).approved? ensure remove_exception_raising_after_save_callback_to_topic end end def xtest_nested_explicit_transactions Topic.transaction do Topic.transaction do @first.approved = 1 @second.approved = 0 @first.save @second.save end end assert Topic.find(1).approved?, "First should have been approved" assert !Topic.find(2).approved?, "Second should have been unapproved" end private def add_exception_raising_after_save_callback_to_topic Topic.class_eval { def after_save() raise "Make the transaction rollback" end } end def remove_exception_raising_after_save_callback_to_topic Topic.class_eval { remove_method :after_save } end end