support classed to have abilities to determine if its instances match all or any conditions

conditions.rb

module Conditions
  def self.included(base)
    class << base
      attr_reader :conditions_map

      def condition(name, &block)
        @conditions_map ||= Hash.new

        @conditions_map.store(name, block)
      end

      def conditions
        @conditions_map ||= Hash.new
        @conditions_map.keys
      end
    end

    def matches_all_conditions?
      self.class.conditions.each do |condition|
        return false unless self.matches?(condition)
      end

      true
    end

    def matches_any_conditions?
      self.class.conditions.each do |condition|
        return true if self.matches?(condition)
      end

      false
    end

    def matches?(condition)
      self.class.conditions_map[condition].call(self)
    end
  end
end

test.rb

require './conditions'

class Test
  include Conditions

  condition :must_length_than_five do |test|
    test.size > 5
  end

  condition :must_respond_to_to_s do |test|
    test.respond_to? :to_s
  end

  def size
    6
  end

  def to_s
    "Test Instance Here"
  end
end

puts Test.conditions
puts "Test's conditions: [:must_length_than_five, :must_respond_to_to_s]"

test = Test.new
puts test.matches_all_conditions?
puts "Expected: test matches all conditions: true"

class Test
  def size
    4
  end
end
puts test.matches_all_conditions?
puts "Expected: test matches all conditions: false"

puts test.matches_any_conditions?
puts "Expected: test matches any conditions: true"

class Test
  undef_method :to_s
end

puts test.matches_any_conditions?
puts "Expected: test matches any conditions: false"

class TestWithoutCondition
  include Conditions
end

puts TestWithoutCondition.conditions

test_result.sh

must_length_than_five
must_respond_to_to_s
Test's conditions: [:must_length_than_five, :must_respond_to_to_s]
true
Expected: test matches all conditions: true
false
Expected: test matches all conditions: false
true
Expected: test matches any conditions: true
false
Expected: test matches any conditions: false