module Shoulda module Matchers if defined?(ActiveSupport::TestCase) # @private AssertionError = ActiveSupport::TestCase::Assertion elsif Gem.ruby_version >= Gem::Version.new('1.8') && Gem.ruby_version < Gem::Version.new('1.9') require 'test/unit' # @private AssertionError = Test::Unit::AssertionFailedError elsif defined?(Test::Unit::AssertionFailedError) # Test::Unit has been loaded already, so we use it # @private AssertionError = Test::Unit::AssertionFailedError elsif Gem.ruby_version >= Gem::Version.new("1.9") begin require 'minitest' rescue LoadError require 'minitest/unit' ensure # @private AssertionError = MiniTest::Assertion end else raise 'No unit test library available' end end end