refine tests

Author: lizk886

src/test/java/com/uid2/operator/OperatorShutdownHandlerTest.java

@@ -19,6 +19,7 @@
 import org.slf4j.LoggerFactory;
 import software.amazon.awssdk.utils.Pair;
 
+import java.security.Permission;
 import java.time.Clock;
 import java.time.Duration;
 import java.time.Instant;
@@ -61,6 +62,7 @@ void shutdownOnAttestFailure(VertxTestContext testContext) {
             this.operatorShutdownHandler.handleAttestResponse(Pair.of(AttestationResponseCode.AttestationFailure, "Unauthorized"));
         } catch (RuntimeException e) {
             verify(shutdownService).Shutdown(1);
+            String message = logWatcher.list.get(0).getFormattedMessage();
             Assertions.assertEquals("core attestation failed with AttestationFailure, shutting down operator, core response: Unauthorized", logWatcher.list.get(0).getFormattedMessage());
             testContext.completeNow();
         }