Ruby refinements not working in CI server

Question

I'm having errors within the Jenkins server:

$ ruby -v
ruby 2.0.0p0 (2013-02-24 revision 39474) [x86_64-linux]

When running rspec, I have the following error:

 undefined method `using' for #<Class:0x000000026f9c88> (NoMethodError)

the exact same code works on my local computer, with ruby2. Here's my version: ruby 2.0.0dev (2012-12-01 trunk 38126) [x86_64-linux] Also, it works on irb. It seems that ruby isn't recognizing the using statement when running a script.

Here's the code:

describe "blah" do
    include TestHelper
    using TestHelper::BrowserRefinement
    ...
end

---

clarification: the refinement is defined in a different file. I'm scourging the interwebs to see if there's a difference between revisions r39474 and r38126.

Answer 1

In current release of Ruby 2.0 (2.0.0p0), using is an instance method of the top-level object main, not that of Module. And it's a private method. If you call it in class/module definition or method definition, a RuntimeError is raised.

"The scope of a refinement activated by main.using is from the point just after main.using is invoked to the end of the file where main.using is invoked. However, when main.using is invoked in a string given as the first argument of Kernel#eval, Kernel#instance_eval, or Module#module_eval, the end of the scope is the end of the string."

You can read more about this in Refinements Specification.

For your test cases, you can write them with eval and pass in the top level bindings, like the test cases in ruby source.

Refinements is still an experimental feature, it may change in future :-)