module RSpec::Rails::TestUnitAssertionAdapter::ClassMethods

def assertion_method_names
  Test::Unit::Assertions.public_instance_methods.select{|m| m.to_s =~ /^(assert|flunk)/} +
    [:build_message]
end

def define_assertion_delegators
  assertion_method_names.each do |m|
    class_eval <<-CODE
      def #{m}(*args, &block)
        assertion_delegate.send :#{m}, *args, &block
      end
    CODE
  end
end