public function testCanAddSameSkuMoreThanOnce()
{
$item1 = new Item(123, 12.5, 1);
$item2 = new Item(123, 22.8, 1);
$transaction = new Transaction(1, 12.5);
$transaction->addItem($item1);
$transaction->addItem($item2);
$items = $transaction->getItems();
$this->assertEquals(1, count($items));
$item = reset($items);
$this->assertEquals(2, $item->getQuantity());
}
protected function prepareTransactionItems(Transaction $transaction)
{
$output = '';
$items = $transaction->getItems();
foreach ($items as $item) {
$output .= $this->prepareTransactionItem($transaction, $item);
}
return $output;
}
