[Test] circuitbreaker test

src/main/java/ku/user/user/service/TestService.java

@@ -0,0 +1,22 @@
+package ku.user.user.service;
+
+import ku.user.client.GameServiceClient;
+import lombok.RequiredArgsConstructor;
+import org.springframework.cloud.client.circuitbreaker.CircuitBreaker;
+import org.springframework.cloud.client.circuitbreaker.CircuitBreakerFactory;
+import org.springframework.stereotype.Service;
+
+@Service
+@RequiredArgsConstructor
+public class TestService {
+    private final GameServiceClient gameServiceClient;
+    private final CircuitBreakerFactory circuitBreakerFactory;
+
+
+    public String getResult(String memberId) {
+        CircuitBreaker circuitBreaker = circuitBreakerFactory.create("circuitBreaker");
+        String result = circuitBreaker.run(()->gameServiceClient.getGameResults("1234"), throwable -> "1234");
+        return result;
+    }
+
+}

src/main/resources/application.yml

@@ -78,7 +78,18 @@ management:
     web:
       exposure:
         include: prometheus
+  endpoint:
+    prometheus:
+      enabled: true
 
 token:
   expiration_time: 86400000
   secret: ${SECRET}
+
+resilience4j:
+  circuitbreaker:
+    instances:
+      gameService:
+        slidingWindowSize: 10  # 설정할 호출 수
+        failureRateThreshold: 50  # 실패율 50% 이상
+        waitDurationInOpenState: 30s  # Open 상태에서 대기 시간

src/test/java/ku/user/client/GameServiceClientTest.java

@@ -0,0 +1,54 @@
+package ku.user.client;
+
+import ku.user.user.service.TestService;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.web.client.RestClientException;
+
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.BDDMockito.given;
+
+@SpringBootTest(properties = "spring.profiles.active=local")
+class GameServiceClientTest {
+
+    @MockBean
+    private GameServiceClient gameServiceClient;
+
+    @Autowired
+    private TestService testService;
+
+    @Test
+    void 요청_시간이_초과되면_예외를_발생시킨다() {
+        // Given: 예외를 던지도록 Mock 설정
+        given(gameServiceClient.getGameResults(anyString()))
+                .willThrow(new RestClientException("Timeout"));
+
+        // When & Then
+        try {
+            gameServiceClient.getGameResults("1234");
+        } catch (RestClientException e) {
+            assertThat(e.getMessage()).contains("Timeout");
+        }
+    }
+
+    @Test
+    void CircuitBreaker가_실패_fallback이_호출된다() {
+        // Given
+        given(gameServiceClient.getGameResults(anyString()))
+                .willThrow(new RuntimeException("Service unavailable"));
+
+
+        // When
+        String result = testService.getResult("testUser");
+
+        // Then
+        assertThat(result).isEqualTo("1234"); // Fallback 결과를 확인
+    }
+
+
+
+}