Ouzo\Validatable::validateNotBlank PHP Method

    public function validateNotBlank($value, $errorMessage, $errorField = null)
    {
        if (Strings::isBlank($value)) {
            $this->error($errorMessage);
            $this->_errorFields[] = $errorField;
        }
    }

 /**
  * @test
  */
 public function shouldNotTreatZeroAsBlank()
 {
     //given
     $validatable = new Validatable();
     //when
     $validatable->validateNotBlank('0', 'blank');
     //then
     Assert::thatArray($validatable->getErrors())->isEmpty();
     Assert::thatArray($validatable->getErrorFields())->isEmpty();
 }