# File lib/buildr/java/bdd.rb, line 166
    def jruby_gem
      %{
       require 'jruby'
       def JRuby.gem(name, version = '>0', *args)
          require 'rbconfig'
          jruby_home = Config::CONFIG['prefix']
          expected_version = '#{TestFramework::JRubyBased.version}'
          unless JRUBY_VERSION >= expected_version
            fail "Expected JRuby version \#{expected_version} installed at \#{jruby_home} but got \#{JRUBY_VERSION}"
          end
          require 'rubygems'
          begin
            Kernel.send :gem, name, version
          rescue LoadError, Gem::LoadError => e
            require 'rubygems/gem_runner'
            args = ['install', name, '--version', version] + args
            Gem::GemRunner.new.run(args)
            Kernel.send :gem, name, version
          end
       end
      }
    end