Remove some uses of List.last

lib/music_library/records/tracklist_pdf.ex

@@ -7,6 +7,8 @@ defmodule MusicLibrary.Records.TracklistPdf do
   alias MusicLibraryWeb.Duration
   alias Typst.Format
 
+  @fallback_config {4, 5, false}
+
   @layout_configs [
     {1, 8, true},
     {2, 8, true},
@@ -14,7 +16,7 @@ defmodule MusicLibrary.Records.TracklistPdf do
     {3, 7, true},
     {3, 6, true},
     {4, 6, false},
-    {4, 5, false}
+    @fallback_config
   ]
 
   # Empirically measured per-column capacities at block(spacing: 3pt),
@@ -127,7 +129,7 @@ defmodule MusicLibrary.Records.TracklistPdf do
 
   @doc false
   def layout_params(total_items, _media_count) do
-    Enum.find(@layout_configs, List.last(@layout_configs), fn {columns, font_size, _} ->
+    Enum.find(@layout_configs, @fallback_config, fn {columns, font_size, _} ->
       capacity(columns, font_size) >= total_items
     end)
   end

test/music_library/listening_stats_test.exs

@@ -96,45 +96,41 @@ defmodule MusicLibrary.ListeningStatsTest do
           scrobbled_at_uts: System.system_time(:second)
         })
 
-      tracks = list_tracks(%{order: :scrobbled_at})
+      assert [track1, track2] = list_tracks(%{order: :scrobbled_at})
 
-      assert length(tracks) == 2
       # Should be ordered by scrobbled_at_uts descending (newest first)
-      assert List.first(tracks).title == "Newer Track"
-      assert List.last(tracks).title == "Older Track"
+      assert track1.title == "Newer Track"
+      assert track2.title == "Older Track"
     end
 
     test "returns tracks ordered by title" do
       track_fixture(%{title: "Zebra Track"})
       track_fixture(%{title: "Alpha Track"})
 
-      tracks = list_tracks(%{order: :title})
+      assert [track1, track2] = list_tracks(%{order: :title})
 
-      assert length(tracks) == 2
-      assert List.first(tracks).title == "Alpha Track"
-      assert List.last(tracks).title == "Zebra Track"
+      assert track1.title == "Alpha Track"
+      assert track2.title == "Zebra Track"
     end
 
     test "returns tracks ordered by artist name" do
       track_fixture(%{artist_name: "Zebra Artist", title: "Track 1"})
       track_fixture(%{artist_name: "Alpha Artist", title: "Track 2"})
 
-      tracks = list_tracks(%{order: :artist})
+      assert [track1, track2] = list_tracks(%{order: :artist})
 
-      assert length(tracks) == 2
-      assert List.first(tracks).artist.name == "Alpha Artist"
-      assert List.last(tracks).artist.name == "Zebra Artist"
+      assert track1.artist.name == "Alpha Artist"
+      assert track2.artist.name == "Zebra Artist"
     end
 
     test "returns tracks ordered by album title" do
       track_fixture(%{album_title: "Zebra Album", title: "Track 1"})
       track_fixture(%{album_title: "Alpha Album", title: "Track 2"})
 
-      tracks = list_tracks(%{order: :album})
+      assert [track1, track2] = list_tracks(%{order: :album})
 
-      assert length(tracks) == 2
-      assert List.first(tracks).album.title == "Alpha Album"
-      assert List.last(tracks).album.title == "Zebra Album"
+      assert track1.album.title == "Alpha Album"
+      assert track2.album.title == "Zebra Album"
     end
 
     test "filters tracks by search query matching track title" do