feat: 댓글 유효성 검사 적용

src/main/java/sixgaezzang/sidepeek/comments/dto/request/CommentRequest.java

@@ -1,6 +1,9 @@
 package sixgaezzang.sidepeek.comments.dto.request;
 
-import static sixgaezzang.sidepeek.common.util.CommonConstant.MAX_TEXT_LENGTH;
+import static sixgaezzang.sidepeek.comments.exception.message.CommentErrorMessage.CONTENT_IS_NULL;
+import static sixgaezzang.sidepeek.comments.exception.message.CommentErrorMessage.CONTENT_OVER_MAX_LENGTH;
+import static sixgaezzang.sidepeek.comments.exception.message.CommentErrorMessage.IS_ANONYMOUS_IS_NULL;
+import static sixgaezzang.sidepeek.comments.util.CommentConstant.MAX_COMMENT_LENGTH;
 import static sixgaezzang.sidepeek.common.util.CommonConstant.MIN_ID;
 
 import io.swagger.v3.oas.annotations.media.Schema;
@@ -12,16 +15,16 @@
 @Schema(description = "댓글 생성/수정 요청 정보")
 public record CommentRequest(
     @Schema(description = "댓글 작성자 식별자", example = "1")
-    @Min(value = MIN_ID, message = "")
+    @Min(value = MIN_ID, message = "작성자 id는 " + MIN_ID + "보다 작을 수 없습니다.")
     Long ownerId,
 
     @Schema(description = "익명 댓글 여부", example = "false")
-    @NotNull
+    @NotNull(message = IS_ANONYMOUS_IS_NULL)
     Boolean isAnonymous,
 
     @Schema(description = "댓글 내용", example = "우와 이 프로젝트 대박인데요?")
-    @Size(max = MAX_TEXT_LENGTH, message = "")
-    @NotBlank
+    @Size(max = MAX_COMMENT_LENGTH, message = CONTENT_OVER_MAX_LENGTH)
+    @NotBlank(message = CONTENT_IS_NULL)
     String content
 ) {
 }

src/main/java/sixgaezzang/sidepeek/comments/exception/message/CommentErrorMessage.java

@@ -0,0 +1,12 @@
+package sixgaezzang.sidepeek.comments.exception.message;
+
+import static sixgaezzang.sidepeek.comments.util.CommentConstant.MAX_COMMENT_LENGTH;
+
+public class CommentErrorMessage {
+    // isAnonymous
+    public static final String IS_ANONYMOUS_IS_NULL = "익명 댓글 여부를 입력해주세요.";
+
+    // content
+    public static final String CONTENT_IS_NULL = "댓글 내용을 입력해주세요.";
+    public static final String CONTENT_OVER_MAX_LENGTH = "댓글은 " + MAX_COMMENT_LENGTH + "자 이하여야 합니다.";
+}

src/main/java/sixgaezzang/sidepeek/comments/util/CommentConstant.java

@@ -0,0 +1,5 @@
+package sixgaezzang.sidepeek.comments.util;
+
+public class CommentConstant {
+    public static final int MAX_COMMENT_LENGTH = 300;
+}