GatewayTests.java

/*
 * Copyright 2002-2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.integration.samples.testing.errorhandling;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageHandlingException;
import org.springframework.messaging.MessagingException;
import org.springframework.integration.channel.QueueChannel;
import org.springframework.integration.samples.testing.gateway.VoidGateway;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;


/**
 * 
 * Shows how to test a gateway to ensure the message injected
 * into the Spring Integration flow is what we expected.
 * The gateway uses a direct input channel. The configuration would
 * be a fragment of a larger flow. Since the input channel is direct,
 * it has no subscribers outside the context of a larger flow. So, 
 * in this test case, we bridge it to a {@link QueueChannel} to
 * facilitate easy testing.
 * 
 * @author Gary Russell
 * @since 2.0.2
 *
 */
@ContextConfiguration	// default context name is <ClassName>-context.xml
@RunWith(SpringJUnit4ClassRunner.class)
public class GatewayTests {
	
	@Autowired
	QueueChannel testChannel;
	
	@Autowired
	VoidGateway gateway;
	
	@Test
	public void testTrueHeader() {
		String payload = "XXXABCXXX";
		String fileName = "abc.txt";
		gateway.process(payload, fileName);
		Message<?> errorMessage = testChannel.receive(0);
		assertNotNull("Expected an error message", errorMessage);
		assertEquals(payload, ((MessagingException) errorMessage.getPayload()).getFailedMessage().getPayload());
		Throwable cause = ((MessagingException) errorMessage.getPayload()).getCause();
		assertTrue("Expected exception, got:" + cause, cause instanceof MessageHandlingException);
	}
}