Metaprogramming Challenge

checked_attr_challenge.rb

# CheckedAttributes Challenge
#
# Make the following two tests pass
# only by implementing the module CheckedAttributes

class Person
  include CheckedAttributes

  attr_checked :age do |v|
    v >= 18
  end
end

require "minitest/autorun"

describe "CheckedAttributes" do
  before do
    @subject = Person.new
  end

  it "raises an error if the validation fails" do
    @subject .age = 18
    assert_equal @subject .age, 18
  end

  it "raises an error if the validation fails" do
    assert_raises(CheckedAttributes::ValidationError) { @subject.age = 12 }
  end
end