간단한 Web페이지 프로젝트(1)-상품 도메인 개발

 

상품 객체

package hello.itemservice.domain.item;

import lombok.Data;


//@Getter
//@Setter
@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;
    }
}

 

Item의 구성 요소

1) id

2) itemName

3) price

4) quantity

 

상품 저장소(ItemRepository)

package hello.itemservice.domain.item;

import org.springframework.stereotype.Repository;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Repository// component scan의 대상이 된다.
public class ItemRepository {

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

    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();
    }
}

 

 

저장소 테스트 itemRepositoryTest

package hello.itemservice.domain.item;

import org.assertj.core.api.Assertions;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.Test;

import java.util.List;

import static org.assertj.core.api.Assertions.assertThat;
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("ItemA",10000,10);
        Item item2 = new Item("ItemB",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 item1 = new Item("Item1",10000,10);

        Item savedItem=itemRepository.save(item1);
        Long itemId = savedItem.getId();

        //when
        Item updateParam = new Item("item2",20000,30);
        itemRepository.update(itemId,updateParam);

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

    }
}