components/camel-velocity/src/test/java/org/apache/camel/component/velocity/VelocitySupplementalContextTest.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.camel.component.velocity;

import java.util.HashMap;
import java.util.Map;

import org.apache.camel.EndpointInject;
import org.apache.camel.Produce;
import org.apache.camel.ProducerTemplate;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.mock.MockEndpoint;
import org.apache.camel.test.junit4.CamelTestSupport;
import org.junit.Test;

public class VelocitySupplementalContextTest extends CamelTestSupport {

    @Produce(uri = "direct:input")
    protected ProducerTemplate inputEndpoint;

    @EndpointInject(uri = "mock:results")
    protected MockEndpoint outputEndpoint;

    @Test
    public void testCamelRoute() throws Exception {
        outputEndpoint.expectedMessageCount(1);
        outputEndpoint.expectedHeaderReceived("body", "new_body");
        outputEndpoint.expectedHeaderReceived("in.body", "old_body");
        outputEndpoint.expectedBodiesReceived("bar");

        Map<String, Object> headers = new HashMap<String, Object>();
        headers.put(VelocityConstants.VELOCITY_TEMPLATE,
                "#set( $headers.body = ${body} )\n#set( $headers['in.body'] = $in.body )\n" + "bar");
        inputEndpoint.sendBodyAndHeaders("old_body", headers);

        assertMockEndpointsSatisfied();
    }

    @Override
    protected RouteBuilder createRouteBuilder() throws Exception {

        final Map<String, Object> supplementalContext = new HashMap<>();
        supplementalContext.put("body", "new_body");

        return new RouteBuilder() {
            @Override
            public void configure() throws Exception {
                from("direct:input")
                    .setHeader(VelocityConstants.VELOCITY_SUPPLEMENTAL_CONTEXT).constant(supplementalContext)
                    .to("velocity:template-in-header")
                    .to("mock:results");
            }
        };
    }

}