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require 'test_helper'
class InstanceTest < BaseTest
Song = Struct.new(:id, :title)
Song.class_eval do
def self.find(id)
new(id, "Invincible")
end
end
describe "lambda { fragment } (new way of class: lambda { nil })" do
representer! do
property :title, :instance => lambda { |options| options[:fragment] }
end
it "skips creating new instance" do
object = Object.new
object.instance_eval do
def from_hash(hash, *args)
hash
end
end
song = OpenStruct.new.extend(representer).from_hash({"title" => object})
song.title.must_equal object
end
end
# TODO: use *args in from_hash.
# DISCUSS: do we need parse_strategy?
describe "property with :instance" do
representer!(:inject => :song_representer) do
property :song,
:instance => lambda { |options| options[:fragment]["id"] == song.id ? song : Song.find(options[:fragment]["id"]) },
:extend => song_representer
end
it( "xxx") { OpenStruct.new(:song => Song.new(1, "The Answer Is Still No")).extend(representer).
from_hash("song" => {"id" => 1}).song.must_equal Song.new(1, "The Answer Is Still No") }
it { OpenStruct.new(:song => Song.new(1, "The Answer Is Still No")).extend(representer).
from_hash("song" => {"id" => 2}).song.must_equal Song.new(2, "Invincible") }
end
describe "collection with :instance" do
representer!(:inject => :song_representer) do
collection :songs,
:instance => lambda { |options|
options[:fragment]["id"] == songs[options[:index]].id ? songs[options[:index]] : Song.find(options[:fragment]["id"])
}, # let's not allow returning nil anymore. make sure we can still do everything as with nil. also, let's remove parse_strategy: sync.
:extend => song_representer
end
it {
album= Struct.new(:songs).new([
Song.new(1, "The Answer Is Still No"),
Song.new(2, "")])
album.
extend(representer).
from_hash("songs" => [{"id" => 2},{"id" => 2, "title"=>"The Answer Is Still No"}]).songs.must_equal [
Song.new(2, "Invincible"), Song.new(2, "The Answer Is Still No")]
}
end
describe "property with lambda receiving fragment and args" do
representer!(:inject => :song_representer) do
property :song, :instance => lambda { |options| Struct.new(:args, :id).new([options[:fragment], options[:user_options]]) }, :extend => song_representer
end
it { OpenStruct.new(:song => Song.new(1, "The Answer Is Still No")).extend(representer).
from_hash({"song" => {"id" => 1}}, user_options: { volume: 1 }).song.args.must_equal([{"id"=>1}, {:volume=>1}]) }
end
# TODO: raise and test instance:{nil}
# describe "property with instance: { nil }" do # TODO: introduce :representable option?
# representer!(:inject => :song_representer) do
# property :song, :instance => lambda { |*| nil }, :extend => song_representer
# end
# let(:hit) { hit = OpenStruct.new(:song => song).extend(representer) }
# it "calls #to_hash on song instance, nothing else" do
# hit.to_hash.must_equal("song"=>{"title"=>"Resist Stance"})
# end
# it "calls #from_hash on the existing song instance, nothing else" do
# song_id = hit.song.object_id
# hit.from_hash("song"=>{"title"=>"Suffer"})
# hit.song.title.must_equal "Suffer"
# hit.song.object_id.must_equal song_id
# end
# end
# lambda { |fragment, i, Context(binding: <..>, args: [..])| }
describe "sync" do
representer!(:inject => :song_representer) do
collection :songs,
:instance => lambda { |options|
songs[options[:index]]
},
:extend => song_representer,
# :parse_strategy => :sync
:setter => lambda { |*| }
end
it {
album= Struct.new(:songs).new(songs = [
Song.new(1, "The Answer Is Still No"),
Song.new(2, "Invncble")])
album.
extend(representer).
from_hash("songs" => [{"title" => "The Answer Is Still No"}, {"title" => "Invincible"}])
album.songs.must_equal [
Song.new(1, "The Answer Is Still No"),
Song.new(2, "Invincible")]
songs.object_id.must_equal album.songs.object_id
songs[0].object_id.must_equal album.songs[0].object_id
songs[1].object_id.must_equal album.songs[1].object_id
}
end
describe "update existing elements, only" do
representer!(:inject => :song_representer) do
collection :songs,
:instance => lambda { |options|
#fragment["id"] == songs[i].id ? songs[i] : Song.find(fragment["id"])
songs.find { |s| s.id == options[:fragment]["id"] }
}, # let's not allow returning nil anymore. make sure we can still do everything as with nil. also, let's remove parse_strategy: sync.
:extend => song_representer,
# :parse_strategy => :sync
:setter => lambda { |*| }
end
it("hooray") {
album= Struct.new(:songs).new(songs = [
Song.new(1, "The Answer Is Still No"),
Song.new(2, "Invncble")])
album.
extend(representer).
from_hash("songs" => [{"id" => 2, "title" => "Invincible"}]).
songs.must_equal [
Song.new(1, "The Answer Is Still No"),
Song.new(2, "Invincible")]
# TODO: check elements object_id!
songs.object_id.must_equal album.songs.object_id
songs[0].object_id.must_equal album.songs[0].object_id
songs[1].object_id.must_equal album.songs[1].object_id
}
end
describe "add incoming elements, only" do
representer!(:inject => :song_representer) do
collection :songs,
:instance => lambda { |options|
songs << song=Song.new(2)
song
}, # let's not allow returning nil anymore. make sure we can still do everything as with nil. also, let's remove parse_strategy: sync.
:extend => song_representer,
# :parse_strategy => :sync
:setter => lambda { |*| }
end
it {
album= Struct.new(:songs).new(songs = [
Song.new(1, "The Answer Is Still No")])
album.
extend(representer).
from_hash("songs" => [{"title" => "Invincible"}]).
songs.must_equal [
Song.new(1, "The Answer Is Still No"),
Song.new(2, "Invincible")]
songs.object_id.must_equal album.songs.object_id
songs[0].object_id.must_equal album.songs[0].object_id
}
end
# not sure if this must be a library strategy
describe "replace existing element" do
representer!(:inject => :song_representer) do
collection :songs,
:instance => lambda { |options|
id = options[:fragment].delete("replace_id")
replaced = songs.find { |s| s.id == id }
songs[songs.index(replaced)] = song=Song.new(3)
song
}, # let's not allow returning nil anymore. make sure we can still do everything as with nil. also, let's remove parse_strategy: sync.
:extend => song_representer,
# :parse_strategy => :sync
:setter => lambda { |*| }
end
it {
album= Struct.new(:songs).new(songs = [
Song.new(1, "The Answer Is Still No"),
Song.new(2, "Invincible")])
album.
extend(representer).
from_hash("songs" => [{"replace_id"=>2, "id" => 3, "title" => "Soulmate"}]).
songs.must_equal [
Song.new(1, "The Answer Is Still No"),
Song.new(3, "Soulmate")]
songs.object_id.must_equal album.songs.object_id
songs[0].object_id.must_equal album.songs[0].object_id
}
end
describe "replace collection" do
representer!(:inject => :song_representer) do
collection :songs,
:extend => song_representer, :class => Song
end
it {
album= Struct.new(:songs).new(songs = [
Song.new(1, "The Answer Is Still No")])
album.
extend(representer).
from_hash("songs" => [{"title" => "Invincible"}]).
songs.must_equal [
Song.new(nil, "Invincible")]
songs.object_id.wont_equal album.songs.object_id
}
end
end
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