components/camel-gson/src/test/java/org/apache/camel/component/gson/GsonFieldNamePolicyTest.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.gson;

import com.google.gson.FieldNamingPolicy;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.test.junit4.CamelTestSupport;
import org.junit.Test;

public class GsonFieldNamePolicyTest extends CamelTestSupport {

    @Test
    public void testUnmarshalPojo() throws Exception {
        String json = "{\"id\":\"123\",\"first_name\":\"Donald\",\"last_name\":\"Duck\"}";
        PersonPojo pojo = template.requestBody("direct:backPojo", json, PersonPojo.class);
        assertNotNull(pojo);

        assertEquals(123, pojo.getId());
        assertEquals("Donald", pojo.getFirstName());
        assertEquals("Duck", pojo.getLastName());
    }

    @Test
    public void testMarshalPojo() throws Exception {
        PersonPojo pojo = new PersonPojo();
        pojo.setId(123);
        pojo.setFirstName("Donald");
        pojo.setLastName("Duck");

        String expected = "{\"id\":123,\"first_name\":\"Donald\",\"last_name\":\"Duck\"}";
        String json = template.requestBody("direct:inPojo", pojo, String.class);
        assertEquals(expected, json);
    }

    @Override
    protected RouteBuilder createRouteBuilder() throws Exception {
        return new RouteBuilder() {
            @Override
            public void configure() throws Exception {
                GsonDataFormat formatPojo = new GsonDataFormat();
                formatPojo.setUnmarshalType(PersonPojo.class);
                formatPojo.setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES);

                from("direct:inPojo").marshal(formatPojo);
                from("direct:backPojo").unmarshal(formatPojo);
            }
        };
    }

}