Include Rails-style initialize method in a class

.gitignore

.rvmrc
Gemfile
Gemfile.lock

rails_style_initializer.gemspec

Gem::Specification.new do |s|
  s.name        = 'rails_style_initializer'
  s.version     = '0.0.1'
  s.platform    = Gem::Platform::RUBY
  s.author      = 'Jared Ning'
  s.email       = '[email protected]'
  s.summary     = 'Rails-style initializer'
  s.description = 'Include Rails-style initialize method in a class. It also includes #attributes=.'

  s.files         = ['rails_style_initializer.rb']
  s.test_file     = 'rails_style_initializer.spec.rb'
  s.require_path  = '.'
end

rails_style_initializer.rb

module RailsStyleInitializer

  def initialize(atts = {})
    self.attributes = atts
  end

  def attributes=(atts)
    atts.each do |att, value|
      send "#{att}=", value
    end
  end

end

rails_style_initializer.spec.rb

require 'minitest/autorun'
require 'rails_style_initializer'

class Player
  include RailsStyleInitializer

  attr_accessor :name
  attr_accessor :score

  def initialize(attributes = {})
    super
    @score ||= 0
  end
end

describe Player do
  it 'is initialized with attributes' do
    player = Player.new(name: 'Roger Federer', score: 40)
    player.name.must_equal 'Roger Federer'
    player.score.must_equal 40
  end

  it 'can be initialized with nothing' do
    player = Player.new
    player.name.must_be_nil
  end

  it 'allows defaults when implemented' do
    player = Player.new
    player.score.must_equal 0
  end

  it '#attributes= assigns attributes' do
    player = Player.new
    player.attributes = {name: 'Andy Murray', score: 30}
    player.name.must_equal 'Andy Murray'
    player.score.must_equal 30
  end
end