/**
* @param InformationUnit $unit
*
* @return InformationUnit
* @throws \OutOfBoundsException
*/
public function subtract(InformationUnit $unit) : self
{
$value = self::convert($unit->getAmount(), $unit->getDimensionCode(), $this->getDimensionCode());
$result = $this->getAmount() - $value;
if ($result < 0) {
throw new \OutOfBoundsException('Cannot subtract, less or equal zero result');
}
$this->amount = $result;
return $this;
}
/**
* Bytes constructor.
*
* @param float $amount
*
* @throws \OutOfBoundsException
*/
public function __construct(float $amount)
{
parent::__construct($amount);
$this->dimension = self::$megaByte;
}