gistfile1.rb

require File.expand_path('../spec_helper', __FILE__)

describe "Class#class_eval" do
  it "uses the right variable scope for class variables declared in class_eval" do
    module ClassAttribute
      class << self
        def included(mod)
          mod.class_eval <<-EOS
            unless defined? @@attribute
              @@attribute = nil
            end
            def self.attribute
              @@attribute
            end
            def self.attribute=(obj)
              @@attribute = obj
            end
          EOS
        end
      end
    end

    class A
      include ClassAttribute
    end

    class B
      include ClassAttribute
    end

    A.attribute = "PASS"
    B.attribute = "FAIL"
    A.attribute.should == "PASS"
  end

end