activesupport/test/core_ext/kernel/concern_test.rb


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# frozen_string_literal: true
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_not Object.ancestors.include?(::ToplevelConcern), mod.ancestors.inspect
  ensure
    Object.send :remove_const, :ToplevelConcern
  end
end