test-unit を rails 4.2 で使う

activesupport_testcase_inherits_test_unit_testcase.rb

# Rails で test-unit を使う. 参考:
# * https://github.com/test-unit/test-unit-activesupport
# * https://github.com/rails/rails/blob/master/activesupport/lib/active_support/test_case.rb
#
require 'minitest'
def Minitest.autorun; end # remove Minitest at_exit process

require 'active_support/test_case'
require 'active_support/testing/tagged_logging'
require 'active_support/testing/assertions'
require 'active_support/testing/time_helpers'

require 'active_support/testing/isolation'

require 'test/unit'

module ActiveSupport
  if const_defined?(:TestCase)
    remove_const :TestCase
  end

  class TestCase < ::Test::Unit::TestCase
    include ActiveSupport::Testing::TaggedLogging
    include ActiveSupport::Testing::Assertions
    include ActiveSupport::Testing::TimeHelpers

    private
    def mu_pp(object)
      AssertionMessage.convert(object)
    end
  end
end