59                                        : void
   60    {
   61        $raised = false;
   62        try {
   63            $with = null;
   64            $next_with = $this->add_label->transform($with);
   65        } 
catch (InvalidArgumentException 
$e) {
 
   66            $raised = true;
   67        }
   68        $this->assertTrue($raised);
   69 
   70        $raised = false;
   71        try {
   72            $without = [1, 2, 3, 4];
   73            $with = $this->add_label->transform($without);
   74        } 
catch (InvalidArgumentException 
$e) {
 
   75            $raised = true;
   76        }
   77        $this->assertTrue($raised);
   78 
   79        $raised = false;
   80        try {
   81            $without = "1, 2, 3";
   82            $with = $this->add_label->transform($without);
   83        } 
catch (InvalidArgumentException 
$e) {
 
   84            $raised = true;
   85        }
   86        $this->assertTrue($raised);
   87 
   88        $raised = false;
   89        try {
   90            $std_class = new stdClass();
   91            $with = $this->add_label->transform($std_class);
   92        } 
catch (InvalidArgumentException 
$e) {
 
   93            $raised = true;
   94        }
   95        $this->assertTrue($raised);
   96    }