Rails core - Nov 2006 - testing actionpack (for patch)

Hello,

I''ve read the file on running tests for actionpack (I''m
working on a
patch), but I''m getting this error...

./test/controller/../../lib/../../activesupport/lib/active_support/dependencies.rb:240:in
`load_missing_constant'': uninitialized constant
ActionView::Helpers::JavaScriptHelper::PrototypeHelper (NameError)

I''ve tried...
rake test_action_pack
rake test
and
ruby test/templates/date_helper_test.rb (the file that my tests need to go in)

How do I resolve this missing constant problem?

Thanks,
Andrew