public function testShouldInvalidWhenIsEmpty()
{
// Set
$shipping = new Shipping();
$volume = m::mock('Axado\\Volume\\VolumeInterface');
$shipping->setPostalCodeOrigin('123123');
$shipping->setPostalCodeDestination('01010');
$shipping->setAditionalDays('12');
$shipping->setAditionalPrice('12.6');
$shipping->addVolume($volume);
// Act
$result = $this->callProtected($shipping, 'isValid');
// Assert
$this->assertFalse($result);
}
