public function test_bootstrap_shutdown()
 {
     mr_bootstrap::startup();
     mr_bootstrap::shutdown();
     $autoloads = spl_autoload_functions();
     $this->assertIsA($autoloads, 'array');
     $found = false;
     foreach ($autoloads as $autoload) {
         if (is_array($autoload) and $autoload[0] instanceof mr_autoload) {
             $found = true;
         }
     }
     $this->assertFalse($found);
 }