Add song class.

models/song.rb

@@ -0,0 +1,15 @@
+require './models/mpd_connection'
+
+class Song < Struct.new(:artist, :album, :title)
+
+  def initialize(song)
+    @song = song
+    self.artist = song.artist
+    self.album = song.album
+    self.title  = song.title
+  end
+
+  def self.queue
+    MPDConnection.mpd.queue.map { |song| self.new(song) }
+  end
+end

spec/models/song_spec.rb

@@ -0,0 +1,16 @@
+require 'spec_helper'
+
+describe Song do
+
+  let(:song1) { MPD::Song.new({ title: 'Back in Black', album: 'Back in Black', genre: 'Rock', date: '1980' }) }
+  let(:song2) { MPD::Song.new({ title: 'Highway to Hell', album: 'Highway to Hell', genre: 'Rock', date: '1979' }) }
+
+  before do
+    MPDConnection.mpd.stub(:queue).and_return([song1, song2])
+  end
+
+  it 'returns the queue of songs' do
+    queue = Song.queue
+    expect(queue).to have(2).items
+  end
+end