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require 'test_helper'
class DecoratorTest < Minitest::Spec
class SongRepresentation < Representable::Decorator
include Representable::JSON
property :name
end
class AlbumRepresentation < Representable::Decorator
include Representable::JSON
collection :songs, :class => Song, :extend => SongRepresentation
end
class RatingRepresentation < Representable::Decorator
include Representable::JSON
property :system
property :value
end
let(:song) { Song.new("Mama, I'm Coming Home") }
let(:album) { Album.new([song]) }
let(:rating) { OpenStruct.new(system: 'MPAA', value: 'R') }
describe "inheritance" do
let(:inherited_decorator) do
Class.new(AlbumRepresentation) do
property :best_song
end.new(Album.new([song], "Stand Up"))
end
it { inherited_decorator.to_hash.must_equal({"songs"=>[{"name"=>"Mama, I'm Coming Home"}], "best_song"=>"Stand Up"}) }
end
let(:decorator) { AlbumRepresentation.new(album) }
let(:rating_decorator) { RatingRepresentation.new(rating) }
it "renders" do
decorator.to_hash.must_equal({"songs"=>[{"name"=>"Mama, I'm Coming Home"}]})
album.wont_respond_to :to_hash
song.wont_respond_to :to_hash # DISCUSS: weak test, how to assert blank slate?
# no @representable_attrs in decorated objects
song.wont_be(:instance_variable_defined?, :@representable_attrs)
rating_decorator.to_hash.must_equal({"system" => "MPAA", "value" => "R"})
end
describe "#from_hash" do
it "returns represented" do
decorator.from_hash({"songs"=>[{"name"=>"Mama, I'm Coming Home"}]}).must_equal album
end
it "parses" do
decorator.from_hash({"songs"=>[{"name"=>"Atomic Garden"}]})
album.songs.first.must_be_kind_of Song
album.songs.must_equal [Song.new("Atomic Garden")]
album.wont_respond_to :to_hash
song.wont_respond_to :to_hash # DISCUSS: weak test, how to assert blank slate?
end
end
describe "#decorated" do
it "is aliased to #represented" do
AlbumRepresentation.prepare(album).decorated.must_equal album
end
end
describe "inline decorators" do
representer!(decorator: true) do
collection :songs, :class => Song do
property :name
end
end
it "does not pollute represented" do
representer.new(album).from_hash({"songs"=>[{"name"=>"Atomic Garden"}]})
# no @representable_attrs in decorated objects
song.wont_be(:instance_variable_defined?, :@representable_attrs)
album.wont_be(:instance_variable_defined?, :@representable_attrs)
end
end
end
require "uber/inheritable_attr"
class InheritanceWithDecoratorTest < Minitest::Spec
class Twin
extend Uber::InheritableAttr
inheritable_attr :representer_class
self.representer_class = Class.new(Representable::Decorator){ include Representable::Hash }
end
class Album < Twin
representer_class.property :title # Twin.representer_class.clone
end
class Song < Twin # Twin.representer_class.clone
end
it do
Twin.representer_class.definitions.size.must_equal 0
Album.representer_class.definitions.size.must_equal 1
Song.representer_class.definitions.size.must_equal 0
end
end
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