rails--rails/activerecord/test/cases/serialization_test.rb

require "cases/helper"
require "models/contact"
require "models/topic"
require "models/book"
require "models/author"
require "models/post"

class SerializationTest < ActiveRecord::TestCase
  fixtures :books

  FORMATS = [ :json ]

  def setup
    @contact_attributes = {
      name: "aaron stack",
      age: 25,
      avatar: "binarydata",
      created_at: Time.utc(2006, 8, 1),
      awesome: false,
      preferences: { gem: "<strong>ruby</strong>" },
      alternative_id: nil,
      id: nil
    }
  end

  def test_include_root_in_json_is_false_by_default
    assert_equal false, ActiveRecord::Base.include_root_in_json, "include_root_in_json should be false by default but was not"
  end

  def test_serialize_should_be_reversible
    FORMATS.each do |format|
      @serialized = Contact.new.send("to_#{format}")
      contact = Contact.new.send("from_#{format}", @serialized)

      assert_equal @contact_attributes.keys.collect(&:to_s).sort, contact.attributes.keys.collect(&:to_s).sort, "For #{format}"
    end
  end

  def test_serialize_should_allow_attribute_only_filtering
    FORMATS.each do |format|
      @serialized = Contact.new(@contact_attributes).send("to_#{format}", only: [ :age, :name ])
      contact = Contact.new.send("from_#{format}", @serialized)
      assert_equal @contact_attributes[:name], contact.name, "For #{format}"
      assert_nil contact.avatar, "For #{format}"
    end
  end

  def test_serialize_should_allow_attribute_except_filtering
    FORMATS.each do |format|
      @serialized = Contact.new(@contact_attributes).send("to_#{format}", except: [ :age, :name ])
      contact = Contact.new.send("from_#{format}", @serialized)
      assert_nil contact.name, "For #{format}"
      assert_nil contact.age, "For #{format}"
      assert_equal @contact_attributes[:awesome], contact.awesome, "For #{format}"
    end
  end

  def test_include_root_in_json_allows_inheritance
    original_root_in_json = ActiveRecord::Base.include_root_in_json
    ActiveRecord::Base.include_root_in_json = true

    klazz = Class.new(ActiveRecord::Base)
    klazz.table_name = "topics"
    assert klazz.include_root_in_json

    klazz.include_root_in_json = false
    assert ActiveRecord::Base.include_root_in_json
    assert !klazz.include_root_in_json
    assert !klazz.new.include_root_in_json
  ensure
    ActiveRecord::Base.include_root_in_json = original_root_in_json
  end

  def test_read_attribute_for_serialization_with_format_without_method_missing
    klazz = Class.new(ActiveRecord::Base)
    klazz.table_name = "books"

    book = klazz.new
    assert_nil book.read_attribute_for_serialization(:format)
  end

  def test_read_attribute_for_serialization_with_format_after_init
    klazz = Class.new(ActiveRecord::Base)
    klazz.table_name = "books"

    book = klazz.new(format: "paperback")
    assert_equal "paperback", book.read_attribute_for_serialization(:format)
  end

  def test_read_attribute_for_serialization_with_format_after_find
    klazz = Class.new(ActiveRecord::Base)
    klazz.table_name = "books"

    book = klazz.find(books(:awdr).id)
    assert_equal "paperback", book.read_attribute_for_serialization(:format)
  end

  def test_find_records_by_serialized_attributes_through_join
    author = Author.create!(name: "David")
    author.serialized_posts.create!(title: "Hello")

    assert_equal 1, Author.joins(:serialized_posts).where(name: "David", serialized_posts: { title: "Hello" }).length
  end
end