Adding persistent ID to Track.

lib/pj/track.rb

@@ -1,5 +1,5 @@
 module PJ
   class Track
-    attr_accessor :track_id
+    attr_accessor :track_id, :persistent_id
   end
 end

spec/track_spec.rb

@@ -14,4 +14,14 @@
     @track.track_id = tid
     @track.track_id.should == tid
   end
+
+  it 'should have a persistent ID' do
+    @track.should respond_to(:persistent_id)
+  end
+
+  it 'should allow setting the persistent ID' do
+    pid = 'EA0123HA03'
+    @track.persistent_id = pid
+    @track.persistent_id.should == pid
+  end
 end