HTMLPurifier_Length::toString PHP Method

    public function toString()
    {
        if (!$this->isValid()) {
            return false;
        }
        return $this->n . $this->unit;
    }

 function testToString()
 {
     $l = new HTMLPurifier_Length('23', 'in');
     $this->assertIdentical($l->toString(), '23in');
 }