[impr-invocationTargetEx] invocation ex (#17270)

Author: sk1418

core-java-modules/core-java-reflection/src/test/java/com/baeldung/reflection/exception/invocationtarget/InvocationTargetUnitTest.java

@@ -1,23 +1,46 @@
 package com.baeldung.reflection.exception.invocationtarget;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 
 import org.junit.jupiter.api.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class InvocationTargetUnitTest {
 
+    private static final Logger LOG = LoggerFactory.getLogger(InvocationTargetUnitTest.class);
+
     @Test
-    public void whenCallingMethodThrowsException_thenAssertCauseOfInvocationTargetException() throws Exception {
+    public void whenCallingMethodThrowsException_thenCorrect() throws Exception {
 
         InvocationTargetExample targetExample = new InvocationTargetExample();
         Method method = InvocationTargetExample.class.getMethod("divideByZeroExample");
-        
+
         Exception exception = assertThrows(InvocationTargetException.class, () -> method.invoke(targetExample));
-        
-        assertEquals(ArithmeticException.class, exception.getCause().getClass());
+        LOG.error("InvocationTargetException Thrown:", exception);
+    }
+
+    @Test
+    public void whenCallingMethodThrowsException_thenPrintUnderlyingException() {
+        try {
+            InvocationTargetExample targetExample = new InvocationTargetExample();
+            Method method = InvocationTargetExample.class.getMethod("divideByZeroExample");
+            method.invoke(targetExample);
+        } catch (InvocationTargetException e) {
+            Throwable cause = e.getCause();
+            if (cause instanceof ArithmeticException) {
+                // handle ArithmeticException
+                LOG.error("InvocationTargetException caused by ArithmeticException:", cause);
+            } else {
+                // handle other exceptions
+                LOG.error("The underlying exception of InvocationTargetException:", cause);
+            }
+        } catch (NoSuchMethodException | IllegalAccessException e) {
+            // for simplicity, rethrow reflection exceptions as RuntimeException
+            throw new RuntimeException(e);
+        }
     }
-}
+}