fix: Fix test stability issues

microservices-idempotent-consumer/src/main/java/com/iluwatar/idempotentconsumer/App.java

@@ -45,7 +45,12 @@ import org.springframework.context.annotation.Bean;
 @Slf4j
 public class App {
   public static void main(String[] args) {
-    SpringApplication.run(App.class, args);
+    var context = SpringApplication.run(App.class, args);
+    if (args.length > 0 && "test".equals(args[0])) {
+      // Close the context immediately during tests to prevent Tomcat/background threads from
+      // hanging the JVM
+      context.close();
+    }
   }
 
   /**

microservices-idempotent-consumer/src/test/java/com/iluwatar/idempotentconsumer/AppTest.java

@@ -40,7 +40,7 @@ class AppTest {
 
   @Test
   void testMain() {
-    assertDoesNotThrow(() -> App.main(new String[] {}));
+    assertDoesNotThrow(() -> App.main(new String[] {"test"}));
   }
 
   @Test