Add the brief_description for Book and Author.

test/decentralised_book_index/metadata/author_test.exs

@@ -128,4 +128,21 @@ defmodule DecentralisedBookIndex.Metadata.AuthorTest do
       assert author.avatar_url == avatar_url
     end
   end
+
+  describe "calculate a brief description" do
+    test "a short description is already enough" do
+      description = "Amazing!"
+      assert description == Ash.calculate!(Metadata.Author, :brief_description,
+                                           refs: %{description: description})
+    end
+
+    test "a long description is too much" do
+      description = "Etiam laoreet quam sed arcu. Donec at pede. Pellentesque tristique imperdiet tortor."
+      brief = "Etiam laoreet quam s..."
+
+      assert String.length(brief) == 23
+      assert brief == Ash.calculate!(Metadata.Author, :brief_description,
+                                     refs: %{description: description})
+    end
+  end
 end

test/decentralised_book_index/metadata/book_test.exs

@@ -273,4 +273,21 @@ defmodule DecentralisedBookIndex.Metadata.BookTest do
       assert book.cover_image_url == cover_image_url
     end
   end
+
+  describe "calculate a brief description" do
+    test "a short description is already enough" do
+      description = "Amazing!"
+      assert description == Ash.calculate!(Metadata.Book, :brief_description,
+                                           refs: %{description: description})
+    end
+
+    test "a long description is too much" do
+      description = "Etiam laoreet quam sed arcu. Donec at pede. Pellentesque tristique imperdiet tortor."
+      brief = "Etiam laoreet quam s..."
+
+      assert String.length(brief) == 23
+      assert brief == Ash.calculate!(Metadata.Book, :brief_description,
+                                     refs: %{description: description})
+    end
+  end
 end