function its_calculated_value_should_be_an_integer(ShippingSubjectInterface $subject)
{
$subject->getShippingVolume()->willReturn(100);
$this->calculate($subject, ['amount' => 500, 'division' => 2])->shouldBeInteger();
}
/**
* {@inheritdoc}
*/
public function calculate(ShippingSubjectInterface $subject, array $configuration)
{
return (int) round($configuration['amount'] * ($subject->getShippingVolume() / $configuration['division']));
}