test_const.rb

require 'test/unit/assertions.rb'
include Test::Unit::Assertions

module ConstantSpecs
  class ParentA
    CS_CONST20 = :const20_2
  end

  class ContainerA
    class ChildA < ParentA
      def self.const20; CS_CONST20; end
    end
  end
end
assert_equal(:const20_2, ConstantSpecs::ContainerA::ChildA.const20)

class ::Object
  CS_CONST20 = :const20_1

  module ConstantSpecs
    class ContainerA
      class ChildA
        def self.const20; CS_CONST20; end
      end
    end
  end
end
assert_equal(:const20_1, ConstantSpecs::ContainerA::ChildA.const20)

puts :ok