[WebPage] 상품 도메인 개발

1. Item Class

@Data
public class Item {

    private Long id;
    private String itemName;
    private Integer price;
    private Integer quantity;

    public Item() {
    }

    public Item(String itemName, Integer price, Integer quantity) {
        this.itemName = itemName;
        this.price = price;
        this.quantity = quantity;
    }
}

 

 

2. ItemRepository

• DB사용하지 않고 간단하게 메모리 활용..

@Repository
public class ItemRepository {

    private static final Map<Long, Item> store = new HashMap<>();
    private static long sequence = 0L;

    public Item save(Item item){
        item.setId(++sequence);
        store.put(item.getId(), item);
        return item;
    }

    public Item findById(Long id){
        return store.get(id);
    }

    public List<Item> findAll(){
        return new ArrayList<>(store.values());
    }

    public void update(Long itemId, Item updateParam){
        Item findItem = findById(itemId);
        findItem.setItemName(updateParam.getItemName());
        findItem.setPrice(updateParam.getPrice());
        findItem.setQuantity(updateParam.getQuantity());

    }

    public void clearStore(){
        store.clear();
    }


}

 

 

3. Test

import java.util.List;

import static org.assertj.core.api.Assertions.*;
import static org.junit.jupiter.api.Assertions.*;

class ItemRepositoryTest {

    ItemRepository itemRepository = new ItemRepository();

    @AfterEach
    void afterEach(){
        itemRepository.clearStore();
    }

    @Test
    void save(){
        //given
        Item item = new Item("itemA", 10000, 10);
        //when
        Item savedItem = itemRepository.save(item);
        //then
        Item findItem = itemRepository.findById(item.getId());
        assertThat(findItem).isEqualTo(savedItem);
    }

    @Test
    void findAll(){
        //given
        Item item1 = new Item("item1", 10000, 10);
        Item item2 = new Item("item2", 20000, 20);

        itemRepository.save(item1);
        itemRepository.save(item2);

        //when
        List<Item> result = itemRepository.findAll();

        //then
        assertThat(result.size()).isEqualTo(2);
        assertThat(result).contains(item1, item2);
    }

    @Test
    void updateItem(){
        //given
        Item item = new Item("item1", 10000, 10);
        Item savedItem = itemRepository.save(item);
        Long itemId = savedItem.getId();

        //when
        Item updateParam = new Item("item2", 20000, 20);
        itemRepository.update(itemId, updateParam);

        //then
        Item findItem = itemRepository.findById(itemId);
        assertThat(findItem.getItemName()).isEqualTo(updateParam.getItemName());
        assertThat(findItem.getQuantity()).isEqualTo(updateParam.getQuantity());
    }

}

 

 

5. GitHub : 210916 domain

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GitHub - bsh6463/MVC3