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

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

@@ -29,4 +29,12 @@ class Product {
         this.discountPolicy = discountPolicy;
     }
 
+    public void update(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;
+    }
 }

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

@@ -29,4 +29,11 @@ class ProductService {
                 product.getDiscountPolicy()
         );
     }
+
+    public void updateProduct(Long productId, UpdateProductRequest request) {
+        final Product product = productPort.getProduct(productId);
+        product.update(request.name(), request.price(), request.discountPolicy());
+
+        productPort.save(product);
+    }
 }

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

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

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

@@ -25,11 +25,7 @@ class ProductApiTest extends ApiTest {
         ProductSteps.상품등록요청(ProductSteps.상품등록요청_생성());
         final Long productId = 1L;
 
-        ExtractableResponse<Response> response = RestAssured.given().log().all()
-                .when()
-                .get("/products/{productId}", productId)
-                .then().log().all()
-                .extract();
+        final var response = ProductSteps.상품조회요청(productId);
 
         assertThat(response.statusCode()).isEqualTo(HttpStatus.OK.value());
         assertThat(response.jsonPath().getString("name")).isEqualTo("상품명");

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

@@ -0,0 +1,50 @@
+package com.example.productorderservice.product;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@ExtendWith(MockitoExtension.class)
+class ProductServicePojoTest {
+
+    private ProductService productService;
+    private StubProductPort productPort = new StubProductPort();
+
+    @BeforeEach
+    void setUp() {
+        productService = new ProductService(productPort);
+    }
+
+    @Test
+    void 상품수정() {
+        final Long productId = 1L;
+        final Product product = new Product("상품명", 1000, DiscountPolicy.NONE);
+        final UpdateProductRequest request = new UpdateProductRequest("상품수정", 2000, DiscountPolicy.NONE);
+
+        productPort.getProduct_will_return = product;
+        productService = new ProductService(productPort);
+
+        productService.updateProduct(productId, request);
+
+        assertThat(product.getName()).isEqualTo("상품수정");
+        assertThat(product.getPrice()).isEqualTo(2000);
+    }
+
+    private static class StubProductPort implements ProductPort {
+
+        public Product getProduct_will_return;
+
+        @Override
+        public void save(Product product) {
+
+        }
+
+        @Override
+        public Product getProduct(long productId) {
+            return getProduct_will_return;
+        }
+    }
+}

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

@@ -25,4 +25,12 @@ public class ProductSteps {
         final AddProductRequest request = new AddProductRequest(name, price, discountPolicy);
         return request;
     }
+
+    public static ExtractableResponse<Response> 상품조회요청(Long productId) {
+        return RestAssured.given().log().all()
+                .when()
+                .get("/products/{productId}", productId)
+                .then().log().all()
+                .extract();
+    }
 }

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

@@ -0,0 +1,19 @@
+package com.example.productorderservice.product;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class ProductTest {
+
+    @Test
+    void update() {
+        Product product = new Product("상품명", 1000, DiscountPolicy.NONE);
+
+        product.update("상품수정", 2000, DiscountPolicy.NONE);
+
+        assertThat(product.getName()).isEqualTo("상품수정");
+        assertThat(product.getPrice()).isEqualTo(2000);
+    }
+
+}