/** @test **/
public function it_calculates_the_total_package_weight()
{
$items = [new PackageItem(['weight' => new Weight(2000, 'g')]), new PackageItem(['weight' => new Weight(1, 'kg')])];
$package = new Package($items);
$this->assertEquals(3, $package->weight(new Unit('kg'))->value());
}
/**
* Get the current rate of shipping.
*
* @param Location|null $origin The origin of the package
* @param Location|null $destination The destination of the package
* @param Package|null $package The package being sent
*
* @return float The shipping rate
*/
public function getRate(Location $origin = null, Location $destination = null, Package $package = null)
{
$weight = $package->weight();
$weight_cost = $weight->in($this->unit)->value() * $this->weight_rate;
return $this->base_rate + $weight_cost;
}
