#92 [feat] : ClovaApiClient 단위 테스트 코드를 작성한다

src/test/java/kusitms/backend/chatbot/infra/adapter/ClovaApiClientTest.java

@@ -0,0 +1,117 @@
+package kusitms.backend.chatbot.infra.adapter;
+
+import kusitms.backend.chatbot.application.dto.request.ClovaRequestDto;
+import kusitms.backend.chatbot.status.ChatbotErrorStatus;
+import kusitms.backend.global.exception.CustomException;
+import okhttp3.mockwebserver.MockResponse;
+import okhttp3.mockwebserver.MockWebServer;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
+import org.springframework.web.reactive.function.client.WebClient;
+import reactor.core.publisher.Mono;
+import reactor.test.StepVerifier;
+
+import java.io.IOException;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+class ClovaApiClientTest {
+
+    private MockWebServer mockWebServer;
+    private ClovaApiClient clovaApiClient;
+
+    @BeforeEach
+    void setUp() throws IOException {
+        mockWebServer = new MockWebServer();
+        mockWebServer.start();
+        String baseUrl = mockWebServer.url("/").toString();
+        clovaApiClient = new ClovaApiClient(WebClient.create(baseUrl));
+    }
+
+    @AfterEach
+    void tearDown() throws IOException {
+        mockWebServer.shutdown();
+    }
+
+    /**
+     * 클로바 API 호출 성공 테스트
+     */
+    @Test
+    void testRequestChatbot_Success() {
+        // Given
+        String responseBody = """
+            {
+                "result": {
+                    "message": {
+                        "content": "응답 메시지"
+                    }
+                }
+            }
+        """;
+        mockWebServer.enqueue(new MockResponse()
+                .setResponseCode(200)
+                .setHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
+                .setBody(responseBody));
+
+        ClovaRequestDto request = new ClovaRequestDto(null, 0.8, 0.3, 256, 1.2);
+
+        // When & Then
+        StepVerifier.create(clovaApiClient.requestChatbot(request))
+                .expectNext("응답 메시지")
+                .verifyComplete();
+    }
+
+    /**
+     * WebClient 통신 오류 발생 테스트
+     */
+    @Test
+    void testRequestChatbot_CommunicationError() {
+        // Given
+        mockWebServer.enqueue(new MockResponse().setResponseCode(500));
+
+        ClovaRequestDto request = new ClovaRequestDto(null, 0.8, 0.3, 256, 1.2);
+
+        // When & Then
+        StepVerifier.create(clovaApiClient.requestChatbot(request))
+                .expectErrorMatches(throwable -> throwable instanceof CustomException
+                        && ((CustomException) throwable).getErrorCode() == ChatbotErrorStatus._CHATBOT_API_COMMUNICATION_ERROR)
+                .verify();
+    }
+
+    /**
+     * 요청 본문 확인 테스트
+     */
+    @Test
+    void testRequestBodyMapping() throws InterruptedException {
+        // Given
+        mockWebServer.enqueue(new MockResponse()
+                .setResponseCode(200)
+                .setHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
+                .setBody("""
+                    {
+                        "result": {
+                            "message": {
+                                "content": "응답 메시지"
+                            }
+                        }
+                    }
+                """));
+
+        ClovaRequestDto request = new ClovaRequestDto(null, 0.8, 0.3, 256, 1.2);
+
+        // When
+        Mono<String> response = clovaApiClient.requestChatbot(request);
+
+        // Then
+        StepVerifier.create(response)
+                .expectNext("응답 메시지")
+                .verifyComplete();
+
+        // 요청 확인
+        String recordedRequest = mockWebServer.takeRequest().getBody().readUtf8();
+        assertNotNull(recordedRequest);
+    }
+}