irb --> require 'mocha'
    ==> true

irb --> require 'stubba'
    ==> true

irb --> String.any_instance.stubs(:blah).returns("blah")
NoMethodError: undefined method `stub' for nil:NilClass
        from /opt/local/lib/ruby/gems/1.8/gems/mocha-0.5.5/lib/mocha/object.rb:57:in `stubs'
        from (irb):3
irb --> exit
duane-johnsons-imac-g5:~/Projects/merb duanejohnson$ irb -rubygems
Welcome to interactive ruby!
irb --> require 'mocha_standalone'
    ==> true

irb --> String.any_instance.stubs(:blah).returns("blah")
NoMethodError: undefined method `stub' for nil:NilClass
        from /opt/local/lib/ruby/gems/1.8/gems/mocha-0.5.5/lib/mocha/object.rb:57:in `stubs'
        from (irb):2