Move function in MusicBrainz main module

test/music_brainz_test.exs

@@ -1,8 +1,9 @@
 defmodule MusicBrainzTest do
   use ExUnit.Case, async: true
 
-  alias MusicBrainz.APIMock
-  import MusicLibrary.Fixtures.ReleaseGroup
+  alias MusicBrainz.{APIMock, ReleaseSearchResult}
+  import MusicBrainz.Fixtures.Release
+  import MusicBrainz.Fixtures.ReleaseGroup
   import Mox
 
   setup :verify_on_exit!
@@ -19,4 +20,22 @@ defmodule MusicBrainzTest do
                MusicBrainz.search_release_group("Marillion", limit: 20, offset: 10)
     end
   end
+
+  describe "search_release_by_barcode/1" do
+    test "it returns releases belonging to the same release group" do
+      barcode = "5052205070023"
+      releases = releases(:queen_greatest_hits)
+
+      expect(APIMock, :search_release_by_barcode, fn ^barcode, _config ->
+        {:ok, Enum.map(releases, &ReleaseSearchResult.from_api_response/1)}
+      end)
+
+      assert {:ok, results} = MusicBrainz.search_release_by_barcode(barcode)
+
+      assert Enum.all?(results, fn result ->
+               result.release_group.id == "69ce61c8-127f-3809-95d8-62fdf3ae1347" &&
+                 result.release_group.title == "Greatest Hits"
+             end)
+    end
+  end
 end