def test_main_unknown_prod(capsys):
main.main(['pie', '--verbose'])
stdout, _ = capsys.readouterr()
expectd_op = ('INFO: Item \'pie\' not in stock\nSubtotal: £0.00\n'
'(No offers available)\nTotal: £0.00')
assert expectd_op in stdout
def test_main(capsys):
main.main(['apples'])
stdout, _ = capsys.readouterr()
expectd_op = 'Subtotal: £1.00\nApples 10% off: -10p\nTotal: £0.90'
assert expectd_op in stdout