eval.rb

require 'test/unit'

class Person; end

class TestCheckedAttribute < Test::Unit::TestCase
  def setup
    add_checked_attribute(Person, :age)
    @bob = Person.new
  end

  def test_accepts_valid_values
    @bob.age = 20
    assert_equal 20, @bob.age
  end

  def test_refuses_nil_values
    assert_raises RuntimeError, 'Invalid attribute' do
      @bob.age = nil
    end
  end

  def test_refuses_false_values
    assert_raises RuntimeError, 'Inlalid attribute' do
      @bob.age = false
    end
  end

  def add_checked_attribute(klass, attribute)
  end
end