✨ validate fields in CreateCommentRequest

backend/src/main/java/net/pengcook/comment/controller/CommentController.java

@@ -1,5 +1,6 @@
 package net.pengcook.comment.controller;
 
+import jakarta.validation.Valid;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
 import net.pengcook.authentication.domain.UserInfo;
@@ -30,7 +31,7 @@ public List<CommentOfRecipeResponse> readComments(@PathVariable long recipeId, @
 
     @PostMapping
     @ResponseStatus(HttpStatus.CREATED)
-    public void createComment(@RequestBody CreateCommentRequest request, @LoginUser UserInfo userInfo) {
+    public void createComment(@RequestBody @Valid CreateCommentRequest request, @LoginUser UserInfo userInfo) {
         commentService.createComment(request, userInfo);
     }
 }

backend/src/main/java/net/pengcook/comment/dto/CreateCommentRequest.java

@@ -1,4 +1,7 @@
 package net.pengcook.comment.dto;
 
-public record CreateCommentRequest(long recipeId, String message) {
+import jakarta.validation.constraints.Min;
+import jakarta.validation.constraints.NotBlank;
+
+public record CreateCommentRequest(@Min(1) long recipeId, @NotBlank String message) {
 }

backend/src/test/java/net/pengcook/comment/controller/CommentControllerTest.java

@@ -16,6 +16,9 @@
 import net.pengcook.comment.dto.CreateCommentRequest;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.NullAndEmptySource;
+import org.junit.jupiter.params.provider.ValueSource;
 import org.springframework.test.context.jdbc.Sql;
 
 @WithLoginUserTest
@@ -69,4 +72,48 @@ void createComment() {
                 .then().log().all()
                 .statusCode(201);
     }
+
+    @Test
+    @DisplayName("댓글 등록 시 레시피 아이디에 0을 입력하면 예외가 발생한다.")
+    void createCommentWithInvalidRecipeId() {
+        CreateCommentRequest request = new CreateCommentRequest(0L, "thank you!");
+
+        RestAssured.given(spec).log().all()
+                .filter(document(DEFAULT_RESTDOCS_PATH,
+                        "레시피에 댓글을 등록할 때 유효하지 않은 레시피 아이디를 입력하면 예외가 발생합니다.",
+                        "댓글 조회 API",
+                        requestFields(
+                                fieldWithPath("recipeId").description("레시피 아이디"),
+                                fieldWithPath("message").description("댓글 내용")
+                        )
+                ))
+                .contentType(ContentType.JSON)
+                .body(request)
+                .when().post("api/comments")
+                .then().log().all()
+                .statusCode(400);
+    }
+
+    @ParameterizedTest
+    @NullAndEmptySource
+    @ValueSource(strings = {" "})
+    @DisplayName("댓글 등록 시 빈 댓글 내용을 입력하면 예외가 발생한다.")
+    void createCommentWithBlankMessage(String message) {
+        CreateCommentRequest request = new CreateCommentRequest(1L, message);
+
+        RestAssured.given(spec).log().all()
+                .filter(document(DEFAULT_RESTDOCS_PATH,
+                        "레시피에 댓글을 등록할 때 유효하지 않은 댓글 내용을 입력하면 예외가 발생합니다.",
+                        "댓글 조회 API",
+                        requestFields(
+                                fieldWithPath("recipeId").description("레시피 아이디"),
+                                fieldWithPath("message").description("댓글 내용")
+                        )
+                ))
+                .contentType(ContentType.JSON)
+                .body(request)
+                .when().post("api/comments")
+                .then().log().all()
+                .statusCode(400);
+    }
 }