activesupport/test/core_ext/kernel/concern_test.rb


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require 'abstract_unit'
require 'active_support/core_ext/kernel/concern'

class KernelConcernTest < ActiveSupport::TestCase
  def test_may_be_defined_at_toplevel
    mod = ::TOPLEVEL_BINDING.eval 'concern(:ToplevelConcern) { }'
    assert_equal mod, ::ToplevelConcern
    assert_kind_of ActiveSupport::Concern, ::ToplevelConcern
    assert !Object.ancestors.include?(::ToplevelConcern), mod.ancestors.inspect
    Object.send :remove_const, :ToplevelConcern
  end
end