plugins/json/src/test/java/org/apache/struts2/json/JSONEnumTest.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.struts2.json;

import java.util.Map;

import junit.framework.TestCase;

/**
 * Test serialization of an Enum in the two supported modes: - Enum as a
 * name=value pair; - Enum as a bean
 */
public class JSONEnumTest extends TestCase {

    /**
     * Asserts that a bean can be serialized to JSON and restored as a map
     */
    public void testEnumAsNameValue() throws Exception {
        Bean bean1 = new Bean();

        bean1.setStringField("str");
        bean1.setBooleanField(true);
        bean1.setCharField('s');
        bean1.setDoubleField(10.1);
        bean1.setFloatField(1.5f);
        bean1.setIntField(10);
        bean1.setLongField(100);
        bean1.setEnumField(AnEnum.ValueA);
        bean1.setEnumBean(AnEnumBean.Two);

        JSONWriter jsonWriter = new DefaultJSONWriter();
        jsonWriter.setEnumAsBean(false);
        String json = jsonWriter.write(bean1);

        Map result = (Map) JSONUtil.deserialize(json);
        assertEquals("str", result.get("stringField"));
        assertEquals(true, result.get("booleanField"));
        assertEquals("s", result.get("charField")); // note: this is a
                                                            // String
        assertEquals(10.1, result.get("doubleField"));
        assertEquals(1.5, result.get("floatField")); // note: this is a
                                                            // Double
        assertEquals(10L, result.get("intField")); // note: this is a
                                                            // Long
        assertEquals(AnEnum.ValueA, AnEnum.valueOf((String) result.get("enumField"))); // note:
                                                                                        // this
                                                                                        // is a
                                                                                        // String
        assertEquals(AnEnumBean.Two, AnEnumBean.valueOf((String) result.get("enumBean"))); // note:
                                                                                            // this
                                                                                            // is a
                                                                                            // String
    }

    /**
     * Asserts that a bean can be serialized to JSON and restored as a map <br>
     * In this case, the name of the enum is in _name and the two properties of
     * AnEnumBean are also serialized
     */
    public void testEnumAsBean() throws Exception {
        Bean bean1 = new Bean();

        bean1.setStringField("str");
        bean1.setBooleanField(true);
        bean1.setCharField('s');
        bean1.setDoubleField(10.1);
        bean1.setFloatField(1.5f);
        bean1.setIntField(10);
        bean1.setLongField(100);
        bean1.setEnumField(AnEnum.ValueA);
        bean1.setEnumBean(AnEnumBean.Two);

        JSONWriter jsonWriter = new DefaultJSONWriter();
        jsonWriter.setEnumAsBean(true);
        String json = jsonWriter.write(bean1);

        Map result = (Map) JSONUtil.deserialize(json);
        assertEquals("str", result.get("stringField"));
        assertEquals(true, result.get("booleanField"));
        assertEquals("s", result.get("charField")); // note: this is a
                                                            // String
        assertEquals(10.1, result.get("doubleField"));
        assertEquals(1.5, result.get("floatField")); // note: this is a
                                                            // Double
        assertEquals(10L, result.get("intField")); // note: this is a
                                                            // Long
        Map enumBean1 = (Map) result.get("enumField");
        assertNotNull(enumBean1);
        assertEquals(AnEnum.ValueA, AnEnum.valueOf((String) enumBean1.get("_name"))); // get
                                                                                        // the
                                                                                        // special
                                                                                        // name
                                                                                        // property
        Map enumBean2 = (Map) result.get("enumBean");
        assertEquals(AnEnumBean.Two, AnEnumBean.valueOf((String) enumBean2.get("_name"))); // get
                                                                                            // the
                                                                                            // special
                                                                                            // name
                                                                                            // property
        assertEquals(AnEnumBean.Two.getPropA(), (String) enumBean2.get("propA")); // get
                                                                                    // the
                                                                                    // propA
                                                                                    // property
        assertEquals(AnEnumBean.Two.getPropB(), (String) enumBean2.get("propB")); // get
                                                                                    // the
                                                                                    // propA
                                                                                    // property
    }
}