fix ut

spring-cloud-starter-tencent-polaris-circuitbreaker/src/main/java/com/tencent/cloud/polaris/circuitbreaker/feign/PolarisFeignCircuitBreakerInvocationHandler.java

@@ -122,7 +122,9 @@ public class PolarisFeignCircuitBreakerInvocationHandler implements InvocationHa
 		}
 		try {
 			return circuitBreaker.run(supplier, fallbackFunction);
-		} catch (FallbackWrapperException e) {
+		}
+		catch (FallbackWrapperException e) {
+			// unwrap And Rethrow
 			throw e.getCause();
 		}
 	}
@@ -134,9 +136,9 @@ public class PolarisFeignCircuitBreakerInvocationHandler implements InvocationHa
 				throw (RuntimeException) underlyingException;
 			}
 			if (underlyingException != null) {
-				throw new IllegalStateException(underlyingException);
+				throw new FallbackWrapperException(underlyingException);
 			}
-			throw new IllegalStateException(exception);
+			throw new FallbackWrapperException(exception);
 		}
 	}
 

spring-cloud-starter-tencent-polaris-circuitbreaker/src/main/java/com/tencent/cloud/polaris/circuitbreaker/resttemplate/PolarisCircuitBreakerRestTemplateInterceptor.java

@@ -98,11 +98,10 @@ public class PolarisCircuitBreakerRestTemplateInterceptor implements ClientHttpR
 						throw new FallbackWrapperException(t);
 					}
 			);
-		} catch (FallbackWrapperException e) {
-			Throwable underlyingException = e.getCause();
-			if (underlyingException instanceof IllegalStateException) {
-				throw e;
 		}
+		catch (FallbackWrapperException e) {
+			// unwrap And Rethrow
+			Throwable underlyingException = e.getCause();
 			if (underlyingException instanceof RuntimeException) {
 				throw (RuntimeException) underlyingException;
 			}

spring-cloud-starter-tencent-polaris-circuitbreaker/src/test/java/com/tencent/cloud/polaris/circuitbreaker/feign/PolarisCircuitBreakerFeignIntegrationTest.java

@@ -111,7 +111,7 @@ public class PolarisCircuitBreakerFeignIntegrationTest {
 		Utils.sleepUninterrupted(2000);
 		assertThatThrownBy(() -> {
 			echoService.echo(null);
-		}).isInstanceOf(Exception.class);
+		}).isInstanceOf(InvocationTargetException.class);
 		assertThatThrownBy(() -> {
 			fooService.echo("test");
 		}).isInstanceOf(NoFallbackAvailableException.class);
@@ -244,7 +244,7 @@ public class PolarisCircuitBreakerFeignIntegrationTest {
 		@Override
 		public String echo(@RequestParam("str") String param) throws InvocationTargetException {
 			if (param == null) {
-				throw new InvocationTargetException(new Exception());
+				throw new InvocationTargetException(new Exception(), "test InvocationTargetException");
 			}
 			return "echo fallback";
 		}

spring-cloud-starter-tencent-polaris-circuitbreaker/src/test/java/com/tencent/cloud/polaris/circuitbreaker/resttemplate/PolarisCircuitBreakerRestTemplateIntegrationTest.java

@@ -75,6 +75,7 @@ import org.springframework.web.util.DefaultUriBuilderFactory;
 import static com.tencent.polaris.test.common.Consts.NAMESPACE_TEST;
 import static com.tencent.polaris.test.common.TestUtils.SERVER_ADDRESS_ENV;
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.RANDOM_PORT;
 import static org.springframework.test.web.client.match.MockRestRequestMatchers.method;
 import static org.springframework.test.web.client.match.MockRestRequestMatchers.requestTo;
@@ -142,12 +143,14 @@ public class PolarisCircuitBreakerRestTemplateIntegrationTest {
 		assertThat(defaultRestTemplate.getForObject("http://localhost:18001/example/service/b/info", String.class)).isEqualTo("fallback");
 		mockServer.verify();
 		mockServer.reset();
+		assertThatThrownBy(() -> {
+			restTemplateFallbackFromPolaris.getForObject("/example/service/b/info", String.class);
+		}).isInstanceOf(IllegalStateException.class);
 		assertThat(restTemplateFallbackFromCode.getForObject("/example/service/b/info", String.class)).isEqualTo("\"this is a fallback class\"");
 		Utils.sleepUninterrupted(2000);
 		assertThat(restTemplateFallbackFromCode2.getForObject("/example/service/b/info", String.class)).isEqualTo("\"this is a fallback class\"");
 		Utils.sleepUninterrupted(2000);
-		assertThat(restTemplateFallbackFromCode3.getForEntity("/example/service/b/info", String.class)
-				.getStatusCode()).isEqualTo(HttpStatus.OK);
+		assertThat(restTemplateFallbackFromCode3.getForEntity("/example/service/b/info", String.class).getStatusCode()).isEqualTo(HttpStatus.OK);
 		Utils.sleepUninterrupted(2000);
 		assertThat(restTemplateFallbackFromCode4.getForObject("/example/service/b/info", String.class)).isEqualTo("fallback");
 		Utils.sleepUninterrupted(2000);