MockArticle - which is "better"? Which would you code/use? Which would you like to maintain?

HardCoded.rb

class MockArticlesHard
  @@articles = {}

  def initialize
    return unless @@articles.empty?

    @@articles[:article_aab] = FactoryGirl.create(:article_aab)
    @@articles[:article_bla] = FactoryGirl.create(:article_bla)
    @@articles[:article_blub] = FactoryGirl.create(:article_blub)
    @@articles[:article_blub_blub] = FactoryGirl.create(:article_blub_blub)
    @@articles[:article_blub_bla] = FactoryGirl.create(:article_blub_bla)

    Article.solr_reindex
  end

  def article_aab
    @@articles[:article_aab]
  end

  def article_bla
    @@articles[:article_bla]
  end

  def article_blub
    @@articles[:article_blub]
  end

  def article_blub_blub
    @@articles[:article_blub_blub]
  end

  def article_blub_bla
    @@articles[:article_blub_bla]
  end

end

Metaprogramming1.rb

class MockArticles
  @@articles = {}
  @@mock_article_names = %w(article_aab article_bla article_blub article_blub_blub article_blub_bla)

  def initialize
    return unless @@articles.empty?

    @@mock_article_names.each do |article_title|
      @@articles[article_title] = FactoryGirl.create(article_title.to_sym)
    end

    Article.solr_reindex
  end

  @@mock_article_names.each do |article_title|
    define_method(article_title) do
      @@articles[article_title]
    end
  end
end

Metaprogramming2.rb

class MockArticles
  @@articles = {}

  def initialize
    return unless @@articles.empty?

    %w(article_aab article_bla article_blub article_blub_blub article_blub_bla).each do |article_title|
      @@articles[article_title] = FactoryGirl.create(article_title.to_sym)
    end

    Article.solr_reindex
  end

  def method_missing(meth, *args)
    @@articles[meth.to_s]
  end
end