Test that although Complex and Rational raise on #dup, we consider them #duplicable?

test_duplicable.rb

begin
  require "bundler/inline"
rescue LoadError => e
  $stderr.puts "Bundler version 1.10 or later is required. Please update your Bundler"
  raise e
end

gemfile(true) do
  source "https://rubygems.org"
  gem "rails", github: "rails/rails"
end

require "active_support"
require "active_support/core_ext/object/duplicable"
require "minitest/autorun"

class BugTest < Minitest::Test
  def test_complex_duplicable
    assert_raises(TypeError) { Complex(1).dup }
    refute Complex(1).duplicable?, "expected instance of Complex not to be `duplicable?`"
  end

  def test_rational_duplicable
    assert_raises(TypeError) { Rational(1).dup }
    refute Rational(1).duplicable?, "expected instance of Rational not to be `duplicable?`"
  end
end