ruby/test/psych/test_array.rb

# frozen_string_literal: true
require_relative 'helper'

module Psych
  class TestArray < TestCase
    class X < Array
    end

    class Y < Array
      attr_accessor :val
    end

    def setup
      super
      @list = [{ :a => 'b' }, 'foo']
    end

    def test_enumerator
      x = [1, 2, 3, 4]
      y = Psych.load Psych.dump x.to_enum
      assert_equal x, y
    end

    def test_another_subclass_with_attributes
      y = Y.new.tap {|o| o.val = 1}
      y << "foo" << "bar"
      y = Psych.unsafe_load Psych.dump y

      assert_equal %w{foo bar}, y
      assert_equal Y, y.class
      assert_equal 1, y.val
    end

    def test_subclass
      yaml = Psych.dump X.new
      assert_match X.name, yaml

      list = X.new
      list << 1
      assert_equal X, list.class
      assert_equal 1, list.first
    end

    def test_subclass_with_attributes
      y = Psych.unsafe_load Psych.dump Y.new.tap {|o| o.val = 1}
      assert_equal Y, y.class
      assert_equal 1, y.val
    end

    def test_backwards_with_syck
      x = Psych.unsafe_load "--- !seq:#{X.name} []\n\n"
      assert_equal X, x.class
    end

    def test_self_referential
      @list << @list
      assert_cycle(@list)
    end

    def test_recursive_array
      @list << @list

      loaded = Psych.load(Psych.dump(@list), aliases: true)

      assert_same loaded, loaded.last
    end

    def test_recursive_array_uses_alias
      @list << @list

      assert_raise(AliasesNotEnabled) do
        Psych.load(Psych.dump(@list), aliases: false)
      end
    end

    def test_cycle
      assert_cycle(@list)
    end
  end
end