[Order API TDD] API 테스트로 전환하기

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

@@ -36,11 +36,16 @@ public ResponseEntity<GetProductResponse> getProduct(@PathVariable final long pr
         return ResponseEntity.ok(response);
     }
 
-    public void updateProduct(final Long productId, final UpdateProductRequest request) {
+    @PatchMapping("/{productId}")
+    @Transactional
+    public ResponseEntity<Void> updateProduct(
+            @PathVariable final Long productId,
+            @RequestBody final UpdateProductRequest request) {
         final Product product = productPort.getProduct(productId);
 
         product.update(request.name(), request.price(), request.discountPolicy());
 
         productPort.save(product);
+        return ResponseEntity.ok().build();
     }
 }

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

@@ -1,12 +1,19 @@
 package com.example.productorderservice.product;
 
+import io.restassured.response.ExtractableResponse;
+import io.restassured.response.Response;
+import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
 class ProductApiTest extends ApiTest {
 
+    @Autowired
+    ProductRepository productRepository;
+
     @Test
     void 상품등록() {
         final var request = ProductSteps.getAddProductRequest();
@@ -19,7 +26,7 @@ class ProductApiTest extends ApiTest {
     @Test
     void 상품조회() {
         ProductSteps.requestAddProduct(ProductSteps.getAddProductRequest());
-        Long productId = 1L;
+        final long productId = 1L;
 
         final var response = ProductSteps.requestInquiryProduct(productId);
 
@@ -28,4 +35,15 @@ class ProductApiTest extends ApiTest {
         assertThat(response.jsonPath().getString("name")).isEqualTo("상품명");
         assertThat(response.jsonPath().getString("price")).isEqualTo("1000");
     }
+
+    @Test
+    void 상품수정() {
+        ProductSteps.requestAddProduct(ProductSteps.getAddProductRequest());
+        final long productId = 1L;
+
+        final ExtractableResponse<Response> response = ProductSteps.requestUpdateProduct(productId);
+
+        assertThat(response.statusCode()).isEqualTo(HttpStatus.OK.value());
+        Assertions.assertEquals("상품 수정", productRepository.findById(1L).get().getName());
+    }
 }

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

@@ -16,7 +16,7 @@ public class ProductServiceTest {
     void updateProduct() {
         productService.addProduct(ProductSteps.getAddProductRequest());
         final Long productId = 1L;
-        final UpdateProductRequest request = new UpdateProductRequest("상품 수정", 2000, DiscountPolicy.NONE);
+        final UpdateProductRequest request = ProductSteps.getUpdateProductRequest();
 
         productService.updateProduct(productId, request);
 

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

@@ -30,4 +30,18 @@ public static ExtractableResponse<Response> requestInquiryProduct(final Long pro
                 .then().log().all()
                 .extract();
     }
+
+    public static UpdateProductRequest getUpdateProductRequest() {
+        return new UpdateProductRequest("상품 수정", 2000, DiscountPolicy.NONE);
+    }
+
+    public static ExtractableResponse<Response> requestUpdateProduct(final long productId) {
+        return RestAssured.given().log().all()
+                .contentType(MediaType.APPLICATION_JSON_VALUE)
+                .body(ProductSteps.getUpdateProductRequest())
+                .when()
+                .patch("/products/{productId}", productId)
+                .then().log().all()
+                .extract();
+    }
 }