PhpOffice\PhpPresentation\Shape\RichText::setColumns PHP Method

    public function setColumns($value = 1)
    {
        if ($value > 16 || $value < 1) {
            throw new \Exception('Number of columns should be 1-16');
        }
        $this->columns = $value;
        return $this;
    }

 /**
  * @expectedException \Exception
  * expectedExceptionMessage Number of columns should be 1-16
  */
 public function testColumnsException()
 {
     $object = new RichText();
     $object->setColumns(1000);
 }