gistfile1.txt

require 'minitest/autorun'

module A; end

class Person; end
class User
  prepend A
end

kode = <<-RUBY_EVAL
  def tester
    'It works!'
  end

  protected :tester
RUBY_EVAL

Person.class_eval(kode, __FILE__, __LINE__ + 1)
User.class_eval(kode, __FILE__, __LINE__ + 1)

describe Person do
  it 'prints the message' do
    Person.new.send(:tester).must_equal 'It works!'
  end
end

describe User do
  it 'prints the message' do
    # won't work because the the top ancestor of the User
    # receiver is not User. Protected method cannot be accessed
    User.new.send(:tester).must_equal 'It works!'
  end
end