#33 tdd(order-service): add product - pojo

product-order-service/src/main/java/com/example/productorderservice/product/AddProductRequest.java

@@ -0,0 +1,12 @@
+package com.example.productorderservice.product;
+
+import org.springframework.util.Assert;
+
+record AddProductRequest(String name, int price, DiscountPolicy discountPolicy) {
+    AddProductRequest {
+        Assert.hasText(name, "상품명은 필수입니다.");
+        Assert.isTrue(price > 0, "상품 가격은 0보다 커야 합니다.");
+        Assert.notNull(discountPolicy, "할인 정책은 필수입니다.");
+    }
+
+}

product-order-service/src/main/java/com/example/productorderservice/product/DiscountPolicy.java

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+package com.example.productorderservice.product;
+
+enum DiscountPolicy {
+    NONE
+
+}

product-order-service/src/main/java/com/example/productorderservice/product/Product.java

@@ -0,0 +1,28 @@
+package com.example.productorderservice.product;
+
+import org.springframework.util.Assert;
+
+class Product {
+    private Long id;
+    private final String name;
+    private final int price;
+    private final DiscountPolicy discountPolicy;
+
+    public Product(String name, int price, DiscountPolicy discountPolicy) {
+        Assert.hasText(name, "상품명은 필수입니다.");
+        Assert.isTrue(price > 0, "상품 가격은 0보다 커야 합니다.");
+        Assert.notNull(discountPolicy, "할인 정책은 필수입니다.");
+
+        this.name = name;
+        this.price = price;
+        this.discountPolicy = discountPolicy;
+    }
+
+    public void assignId(final Long id) {
+        this.id = id;
+    }
+
+    public Long getId() {
+        return id;
+    }
+}

product-order-service/src/main/java/com/example/productorderservice/product/ProductAdapter.java

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+package com.example.productorderservice.product;
+
+class ProductAdapter implements ProductPort {
+
+    private final ProductRepository productRepository;
+
+    ProductAdapter(ProductRepository productRepository) {
+        this.productRepository = productRepository;
+    }
+
+    @Override
+    public void save(Product product) {
+        productRepository.save(product);
+    }
+}

product-order-service/src/main/java/com/example/productorderservice/product/ProductPort.java

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+package com.example.productorderservice.product;
+
+interface ProductPort {
+    void save(Product product);
+}

product-order-service/src/main/java/com/example/productorderservice/product/ProductRepository.java

@@ -0,0 +1,14 @@
+package com.example.productorderservice.product;
+
+import java.util.HashMap;
+import java.util.Map;
+
+class ProductRepository {
+    private Map<Long, Product> persistence = new HashMap<>();
+    private Long sequence = 0L;
+
+    public void save(final Product product) {
+        product.assignId(++sequence);
+        persistence.put(product.getId(), product);
+    }
+}

product-order-service/src/main/java/com/example/productorderservice/product/ProductService.java

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+package com.example.productorderservice.product;
+
+class ProductService {
+    private final ProductPort productPort;
+
+    ProductService(ProductPort productPort) {
+        this.productPort = productPort;
+    }
+
+
+    public void addProduct(AddProductRequest request) {
+        final Product product = new Product(request.name(), request.price(), request.discountPolicy());
+
+        productPort.save(product);
+    }
+}

product-order-service/src/test/java/com/example/productorderservice/product/ProductServiceTest.java

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+package com.example.productorderservice.product;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+class ProductServiceTest {
+
+    private ProductService productService;
+    private ProductPort productPort;
+    private ProductRepository productRepository;
+
+    @BeforeEach
+    void setUp() {
+        productRepository = new ProductRepository();
+        productPort = new ProductAdapter(productRepository);
+        productService = new ProductService(productPort);
+    }
+
+    @Test
+    void 상품등록() {
+        final AddProductRequest request = 상품등록요청_생성();
+
+        productService.addProduct(request);
+    }
+
+    private static AddProductRequest 상품등록요청_생성() {
+        final String name = "상품명";
+        final int price = 1000;
+        final DiscountPolicy discountPolicy = DiscountPolicy.NONE;
+
+        final AddProductRequest request = new AddProductRequest(name, price, discountPolicy);
+        return request;
+    }
+
+}