Extend Last.fm Feed album/artist functions

test/last_fm/feed_test.exs

@@ -49,12 +49,28 @@ defmodule LastFm.FeedTest do
 
     test "it returns artists in descending order of scrobble" do
       :ok = Feed.update([@track_two, @track_one])
-      assert [@track_one.artist] == Feed.all_artists()
+
+      assert [
+               %{
+                 artist: @track_two.artist,
+                 scrobbled_at_uts: @track_two.scrobbled_at_uts,
+                 scrobbled_at_label: @track_two.scrobbled_at_label
+               }
+             ] ==
+               Feed.all_artists()
     end
 
     test "it returns albums in descending order of scrobble" do
       :ok = Feed.update([@track_two, @track_one])
-      assert [@track_one.album] == Feed.all_albums()
+
+      assert [
+               %{
+                 album: @track_two.album,
+                 cover_url: @track_two.cover_url,
+                 scrobbled_at_uts: @track_two.scrobbled_at_uts,
+                 scrobbled_at_label: @track_two.scrobbled_at_label
+               }
+             ] == Feed.all_albums()
     end
   end
 end