public void patchCommentById(
            final Long memberId,
            final Long commentId,
            final CommentPatchRequest request
    ) {
        Comment comment = findComment(commentId);
        comment.update(request.comment(), memberId);
    }
@Test
    void 댓글을_수정한다() {
        // given
        Comment saved = commentRepository.save(댓글_생성());
        String text = "edit";
        CommentPatchRequest req = new CommentPatchRequest(text);

        // when
        commentService.patchCommentById(1L, 1L, req);

        // then
        assertThat(saved.getContent()).isEqualTo(text);
    }