Add medium tracks

lib/musicbrainz/bindings/medium.rb

@@ -5,6 +5,9 @@ def parse(xml)
         {
           position: (xml.xpath('./position').text rescue nil),
           format: (xml.xpath('./format').text rescue nil),
+          tracks: xml.xpath('./track-list/track').map do |track_xml|
+            MusicBrainz::Bindings::Track.parse(track_xml)
+          end
         }
       end
 

lib/musicbrainz/models/medium.rb

@@ -2,5 +2,10 @@ module MusicBrainz
   class Medium < BaseModel
     field :position, Integer
     field :format, String
+    field :tracks, Array
+
+    def tracks=(tracks_data)
+      @tracks = tracks_data.map { |track_data| Track.new(track_data) }
+    end
   end
 end

lib/musicbrainz/models/release.rb

@@ -12,7 +12,7 @@ class Release < BaseModel
     field :quality, String
 
     def mediums
-      @mediums ||= client.load(:release, { id: id, inc: [:media], limit: 100 }, {
+      @mediums ||= client.load(:release, { id: id, inc: [:recordings, :media], limit: 100 }, {
         binding: :release_mediums,
         create_models: :medium,
         sort: :position

spec/bindings/medium_spec.rb

@@ -8,11 +8,30 @@
       <medium>
         <position>1</position>
         <format id="9712d52a-4509-3d4b-a1a2-67c88c643e31">CD</format>
+        <track-list>
+          <track id="0501cf38-48b7-3026-80d2-717d574b3d6a">
+            <position>1</position>
+            <number>1</number>
+            <length>233013</length>
+            <recording id="b3015bab-1540-4d4e-9f30-14872a1525f7">
+              <title>Empire</title>
+              <length>233013</length>
+              <first-release-date>2006-08-25</first-release-date>
+            </recording>
+          </track>
+        </track-list>
       </medium>
     XML
 
     it 'contains medium attributes' do
       expect(parse).to include(position: '1', format: 'CD')
     end
+
+    it 'contains track attributes' do
+      expect(parse[:tracks].first).to include(
+        id: '0501cf38-48b7-3026-80d2-717d574b3d6a', position: '1', length: '233013',
+        recording_id: 'b3015bab-1540-4d4e-9f30-14872a1525f7', title: 'Empire'
+      )
+    end
   end
 end

spec/models/release_spec.rb

@@ -5,9 +5,6 @@
     mock url: 'http://musicbrainz.org/ws/2/release/2225dd4c-ae9a-403b-8ea0-9e05014c778f?inc=media+release-groups',
          fixture: 'release/find_2225dd4c-ae9a-403b-8ea0-9e05014c778f.xml'
 
-    mock url: 'http://musicbrainz.org/ws/2/release/2225dd4c-ae9a-403b-8ea0-9e05014c778f?inc=media&limit=100',
-         fixture: 'release/find_2225dd4c-ae9a-403b-8ea0-9e05014c778f.xml'
-
     mock url: 'http://musicbrainz.org/ws/2/release/2225dd4c-ae9a-403b-8ea0-9e05014c778f?inc=recordings+media&limit=100',
          fixture: 'release/find_2225dd4c-ae9a-403b-8ea0-9e05014c778f_tracks.xml'
 
@@ -58,6 +55,14 @@
       expect(mediums.first.position).to eq 1
       expect(mediums.first.format).to eq "CD"
     end
+
+    it "gets correct mediums tracks" do
+      expect(mediums.first.tracks.length).to eq 11
+      expect(mediums.first.tracks.first.position).to eq 1
+      expect(mediums.first.tracks.first.recording_id).to eq "b3015bab-1540-4d4e-9f30-14872a1525f7"
+      expect(mediums.first.tracks.first.title).to eq "Empire"
+      expect(mediums.first.tracks.first.length).to eq 233013
+    end
   end
 
   describe '#tracks' do