rails/activerecord/test/cases/dup_test.rb

# frozen_string_literal: true

require "cases/helper"
require "models/reply"
require "models/topic"
require "models/movie"
require "models/car"

module ActiveRecord
  class DupTest < ActiveRecord::TestCase
    fixtures :topics, :cars

    def test_dup
      assert_not_predicate Topic.new.freeze.dup, :frozen?
    end

    def test_not_readonly
      topic = Topic.first

      duped = topic.dup
      assert_not duped.readonly?, "should not be readonly"
    end

    def test_is_readonly
      topic = Topic.first
      topic.readonly!

      duped = topic.dup
      assert_predicate duped, :readonly?, "should be readonly"
    end

    def test_dup_not_persisted
      topic = Topic.first
      duped = topic.dup

      assert_not duped.persisted?, "topic not persisted"
      assert_predicate duped, :new_record?, "topic is new"
    end

    def test_dup_not_previously_new_record
      topic = Topic.first
      duped = topic.dup

      assert_not duped.previously_new_record?, "should not be a previously new record"
    end

    def test_dup_not_destroyed
      topic = Topic.first
      topic.destroy

      duped = topic.dup
      assert_not_predicate duped, :destroyed?
    end

    def test_dup_has_no_id
      topic = Topic.first
      duped = topic.dup
      assert_nil duped.id
    end

    def test_dup_with_modified_attributes
      topic = Topic.first
      topic.author_name = "Aaron"
      duped = topic.dup
      assert_equal "Aaron", duped.author_name
    end

    def test_dup_with_changes
      dbtopic = Topic.first
      topic = Topic.new

      topic.attributes = dbtopic.attributes.except("id")

      # duped has no timestamp values
      duped = dbtopic.dup

      # clear topic timestamp values
      topic.send(:clear_timestamp_attributes)

      assert_equal topic.changes, duped.changes
    end

    def test_dup_topics_are_independent
      topic = Topic.first
      topic.author_name = "Aaron"
      duped = topic.dup

      duped.author_name = "meow"

      assert_not_equal topic.changes, duped.changes
    end

    def test_dup_attributes_are_independent
      topic = Topic.first
      duped = topic.dup

      duped.author_name = "meow"
      topic.author_name = "Aaron"

      assert_equal "Aaron", topic.author_name
      assert_equal "meow", duped.author_name
    end

    def test_dup_timestamps_are_cleared
      topic = Topic.first
      assert_not_nil topic.updated_at
      assert_not_nil topic.created_at

      # temporary change to the topic object
      topic.updated_at -= 3.days

      # dup should not preserve the timestamps if present
      new_topic = topic.dup
      assert_nil new_topic.updated_at
      assert_nil new_topic.created_at

      new_topic.save
      assert_not_nil new_topic.updated_at
      assert_not_nil new_topic.created_at
    end

    def test_dup_locking_column_is_cleared
      car = Car.first
      car.touch
      assert_not_equal 0, car.lock_version

      car.lock_version = 1000

      new_car = car.dup
      assert_equal 0, new_car.lock_version
    end

    def test_dup_locking_column_is_not_dirty
      car = Car.first
      car.touch
      assert_not_equal 0, car.lock_version

      car.lock_version += 1
      new_car = car.dup
      assert_not_predicate new_car, :lock_version_changed?
    end

    def test_dup_after_initialize_callbacks
      topic = Topic.new
      assert Topic.after_initialize_called
      Topic.after_initialize_called = false
      topic.dup
      assert Topic.after_initialize_called
    end

    def test_dup_validity_is_independent
      repair_validations(Topic) do
        Topic.validates_presence_of :title
        topic = Topic.new("title" => "Literature")
        topic.valid?

        duped = topic.dup
        duped.title = nil
        assert_predicate duped, :invalid?

        topic.title = nil
        duped.title = "Mathematics"
        assert_predicate topic, :invalid?
        assert_predicate duped, :valid?
      end
    end

    def test_dup_with_default_scope
      prev_default_scopes = Topic.default_scopes
      Topic.default_scopes = [ActiveRecord::Scoping::DefaultScope.new(proc { Topic.where(approved: true) })]
      topic = Topic.new(approved: false)
      assert_not topic.dup.approved?, "should not be overridden by default scopes"
    ensure
      Topic.default_scopes = prev_default_scopes
    end

    def test_dup_without_primary_key
      klass = Class.new(ActiveRecord::Base) do
        self.table_name = "parrots_pirates"
      end

      record = klass.create!

      assert_nothing_raised do
        record.dup
      end
    end

    def test_dup_record_not_persisted_after_rollback_transaction
      movie = Movie.new(name: "test")

      assert_raises(ActiveRecord::RecordInvalid) do
        Movie.transaction do
          movie.save!
          duped = movie.dup
          duped.name = nil
          duped.save!
        end
      end

      assert_not movie.persisted?
    end
  end
end