Errors in ActiveRecord test suite edge - Rails 3.0.0.beta3 missing constantize on associations

Hi,

Trying to run test suite on edge right now fails because 'constantize' is not found from active support. Occurs when testing MySQL/Postgres in either 'rake test' or 'rake test_mysql' or 'rake test_postgresql'

Error received:

Using native PostgreSQL
/Development/Projects/rails/activerecord/lib/active_record/associations.rb:1722:in create_extension_modules': undefined methodconstantize' for Object::DeveloperProjectsAssociationExtension (NoMethodError)

Errors running test_mysql, test_sqlite3, test_postgresql

assocations.rb doesn't have a reference (requires) for 'active_support/core_ext/string/conversions' where constantize is located.

Fix is attached to simply add a :

require 'active_support/core_ext/string/conversions'