/**
* @see Hashable::getHash
*
* The hash is purely valuer based. Order of the elements in the array is not held into account.
*
* @since 0.1
*
* @return string
*/
public function getHash()
{
$hasher = new MapValueHasher();
return $hasher->hash($this);
}
public function testHashThrowsExceptionOnInvalidArgument()
{
$hasher = new MapValueHasher();
$this->setExpectedException('InvalidArgumentException');
$hasher->hash(null);
}
