def test_give_unit_of_type(self):
warehouse = Warehouse()
unit = Unit('company', 'model1')
warehouse.add_unit(unit)
given_unit = warehouse.give_unit_of_type(Unit)
self.assertEqual(unit, given_unit)
self.assertRaises(NoUnitsLeft, warehouse.give_unit_of_type, Unit)
def test_add(self):
warehouse = Warehouse()
unit = Unit('company', 'model1')
warehouse.add_unit(unit)
self.assertEqual(warehouse.units[Unit], [unit])