function deny_testimonial($testimonial_id)
{
    $testi = new Testimonials();
    $testi->testimonial_id = $testimonial_id;
    $testi->status = DENIED;
    $testi->change_status();
}
 public function testChange_statusWithInvalidStatus()
 {
     $testi = new Testimonials();
     $testi->status = 'delete';
     $testi->testimonial_id = 1;
     try {
         $testi->change_status();
     } catch (PAException $e) {
         $error = $e->message;
         $code = $e->code;
     }
     $this->assertEquals($code, INVALID_PARAMETER);
 }