Running RSpec on Google App Engine via JRuby

I'm trying to write some tests (RSpec) against the AppEngine and its datastore. I've tried to load the environment and tests via:

appcfg.rb run -S spec app/tests/

And I end up with the following error:

spec:19: undefined method `bin_path' for Gem:Module (NoMethodError)

I can run non-appengine specs just fine by running:

spec app/tests/

Any suggestions on how to get RSpec up and running with JRuby and Google App Engine would be greatly appreciated. Thank you.

Some versions numbers for your face:

jruby 1.4.0 (ruby 1.8.7 patchlevel 174) (2009-11-02 6586) (Java HotSpot(TM) 64-Bit Server VM 开发者_StackOverflow社区1.6.0_17) [x86_64-java]

rspec (1.3.0) appengine-apis (0.0.12) appengine-jruby-jars (0.0.6) appengine-rack (0.0.6) appengine-sdk (1.3.1) appengine-tools (0.0.10.1) dm-appengine (0.0.7) dm-core (0.10.2)

spec:19: undefined method `bin_path' for Gem:Module (NoMethodError)

looks like

http://www.ruby-forum.com/topic/205780