댓글 최대 2 depth - CUD API 테스트 & 테스트 데이터 삽입 RestClient 호출시 null

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댓글 최대 2 depth - CUD API 테스트 & 테스트 데이터 삽입 시 RestClient 호출시 null 발생 됩니다.

혹시 어느 부분을 봐야 할까요??

> Task :service:comment:test

CommentApiTest > create() FAILED

org.springframework.web.client.ResourceAccessException at CommentApiTest.java:36

Caused by: java.net.ConnectException at CommentApiTest.java:36

Caused by: java.net.ConnectException at Utils.java:1041

Caused by: java.nio.channels.ClosedChannelException at SocketChannelImpl.java:202

1 test completed, 1 failed

> Task :service:comment:test FAILED

FAILURE: Build failed with an exception.

* What went wrong:

Execution failed for task ':service:comment:test'.

package kuke.board.comment.service.api;

import kuke.board.comment.service.response.CommentResponse;
import lombok.AllArgsConstructor;
import lombok.Getter;
import org.junit.jupiter.api.Test;
import org.springframework.web.client.RestClient;


public class CommentApiTest {


    RestClient restClient = RestClient.create("http://localhost:9001");

    @Test
    void create() {

        CommentResponse response1 = createComment(new CommentCreateRequest(1L, "my comment1", null, 1L));
        CommentResponse response2 = createComment(new CommentCreateRequest(1L, "my comment2", response1.getCommentId(), 1L));
        CommentResponse response3 = createComment(new CommentCreateRequest(1L, "my comment3", response1.getCommentId(), 1L));

        System.out.println("commentId=%s".formatted(response1.getCommentId()));
        System.out.println("\tcommentId=%s".formatted(response2.getCommentId()));
        System.out.println("\tcommentId=%s".formatted(response3.getCommentId()));

    }

    CommentResponse createComment(CommentCreateRequest request) {
        return restClient.post()
                .uri("/v1/comments")
                .body(request)
                .retrieve()
                .body(CommentResponse.class);
    }


    @Getter
    @AllArgsConstructor
    public static class CommentCreateRequest {
        private Long articleId;
        private String content;
        private Long parentCommentId;
        private Long writerId;
    }
}

CommentResponse createComment(CommentCreateRequest request) {
    return restClient.post()
            .uri("/v1/comments")
            .body(request)
            .retrieve()
            .body(CommentResponse.class);  <--- 33번째 라인 
}