def test_can_hold_cargo_returns_true_if_slot_is_not_available(self):
		tray = SlottedCargoContainer()
		self.assertFalse(tray.can_hold_cargo(Fish))
	def test_can_hold_cargo_returns_true_if_slot_is_available(self):
		tray = SlottedCargoContainer()
		tray.add_resource_slot(Fish, 1)
		self.assertTrue(tray.can_hold_cargo(Fish))