def test_list_of_selected_phones_buy(self):
test = Purchase()
test.select_cell_phone("Motorola G99")
test.select_cell_phone("Motorola G99")
test.unselect_cell_phone("Motorola G99")
self.assertEqual(test.buy(),"Motorola G99 " )
def test_buy_when_no_selected_phone(self):
test = Purchase()
self.assertEqual(test.buy(),"Please add something to the list" )