parameters_each.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"
  #gem "rails", github: "domcleal/rails", branch: 'ac-params-each-yields'
  gem "arel", github: "rails/arel"
end

require "action_controller/railtie"
require "minitest/autorun"

class BugTest < Minitest::Test
  def test_ac_parameters_each_yield
    yielded = []
    ActionController::Parameters.new(a: 'a', b: 'b').each { |arg| yielded << arg }
    assert_equal [["a", "a"], ["b", "b"]], yielded
  end
end