CAMEL-22549: Fix CXF dispatch oneway tests to check absence of response

For oneway operations, no response message is created. The old getOut()
created an empty OUT (null body), but getMessage() returns IN (with request
body). Check ExchangeHelper.hasResponse() instead of null body assertion.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: gnodet

components/camel-cxf/camel-cxf-spring-soap/src/test/java/org/apache/camel/component/cxf/CxfDispatchMessageTest.java

@@ -25,13 +25,14 @@
 import org.apache.camel.Exchange;
 import org.apache.camel.Processor;
 import org.apache.camel.component.cxf.common.message.CxfConstants;
+import org.apache.camel.support.ExchangeHelper;
 import org.junit.jupiter.api.Test;
 import org.springframework.context.support.AbstractApplicationContext;
 import org.springframework.context.support.ClassPathXmlApplicationContext;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
-import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 /**
@@ -63,10 +64,8 @@ public void testDipatchMessageOneway() throws Exception {
         Exchange exchange = sendJaxWsDispatchMessage(name, true);
         assertEquals(false, exchange.isFailed(), "The request should be handled sucessfully");
 
-        org.apache.camel.Message response = exchange.getMessage();
-        assertNotNull(response, "The response message must not be null");
-
-        assertNull(response.getBody(), "The response body must be null");
+        // Oneway operation should not produce a response
+        assertFalse(ExchangeHelper.hasResponse(exchange), "The oneway response must not have a response message");
     }
 
     protected Exchange sendJaxWsDispatchMessage(final String name, final boolean oneway) {

components/camel-cxf/camel-cxf-spring-soap/src/test/java/org/apache/camel/component/cxf/CxfDispatchPayloadTest.java

@@ -28,14 +28,15 @@
 import org.apache.camel.component.cxf.common.CxfPayload;
 import org.apache.camel.component.cxf.common.message.CxfConstants;
 import org.apache.camel.component.cxf.converter.CxfPayloadConverter;
+import org.apache.camel.support.ExchangeHelper;
 import org.apache.cxf.binding.soap.SoapHeader;
 import org.junit.jupiter.api.Test;
 import org.springframework.context.support.AbstractApplicationContext;
 import org.springframework.context.support.ClassPathXmlApplicationContext;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
-import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 /**
@@ -67,10 +68,8 @@ public void testDispatchPayloadOneway() throws Exception {
         Exchange exchange = sendJaxWsDispatchPayload(name, true);
         assertEquals(false, exchange.isFailed(), "The request should be handled sucessfully");
 
-        org.apache.camel.Message response = exchange.getMessage();
-        assertNotNull(response, "The response must not be null");
-
-        assertNull(response.getBody(), "The response must be null");
+        // Oneway operation should not produce a response
+        assertFalse(ExchangeHelper.hasResponse(exchange), "The oneway response must not have a response message");
     }
 
     private Exchange sendJaxWsDispatchPayload(final String name, final boolean oneway) {