/**
  * Test whether sandbox custom function validation succeeds
  */
 public function testCustomFunctionValidationFailure()
 {
     $this->setExpectedException('PHPSandbox\\Error');
     $this->sandbox->set_func_validator(function ($name) {
         return $name == 'test';
     });
     $this->sandbox->execute(function () {
         test2();
     });
 }