Test fragmented key on attribute

Author: bf4

test/cache_test.rb

@@ -127,7 +127,7 @@ def test_cache_options_definition
     end
 
     def test_fragment_cache_definition
-      assert_equal([:name], @role_serializer.class._cache_only)
+      assert_equal([:name, :slug], @role_serializer.class._cache_only)
       assert_equal([:content], @bio_serializer.class._cache_except)
     end
 

test/fixtures/poro.rb

@@ -136,10 +136,11 @@ def custom_options
 end
 
 RoleSerializer = Class.new(ActiveModel::Serializer) do
-  cache only: [:name], skip_digest: true
-  attributes :id, :name, :description, :slug
+  cache only: [:name, :slug], skip_digest: true
+  attributes :id, :name, :description
+  attribute :friendly_id, key: :slug
 
-  def slug
+  def friendly_id
     "#{object.name}-#{object.id}"
   end