require 'abstract_unit' require 'bigdecimal' require 'active_support/core_ext/object/duplicable' class DuplicableTest < Test::Unit::TestCase NO = [nil, false, true, :symbol, 1, 2.3, BigDecimal.new('4.56'), Class.new] YES = ['1', Object.new, /foo/, [], {}, Time.now] def test_duplicable NO.each do |v| assert !v.duplicable? begin v.dup fail rescue Exception end end YES.each do |v| assert v.duplicable? assert_nothing_raised { v.dup } end end end