marshaller/json/src/test/java/org/apache/karaf/decanter/marshaller/json/TestJsonMarshaller.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.karaf.decanter.marshaller.json;

import java.io.StringReader;
import java.util.Dictionary;
import java.util.Hashtable;
import java.util.HashMap;
import java.util.Map;

import javax.json.Json;
import javax.json.JsonObject;
import javax.json.JsonReader;

import org.apache.karaf.decanter.api.marshaller.Marshaller;
import org.junit.Assert;
import org.junit.Test;
import org.osgi.service.event.Event;
import org.osgi.service.event.EventConstants;

public class TestJsonMarshaller {

    private static final long EXPECTED_TIMESTAMP = 1454428780634L;
    private static final String EXPECTED_TOPIC = "testTopic";
    private static final String DOT_KEY = "test.key";
    private static final String DOT_VALUE = "test.value";
    private static final String EXPECTED_DOT_KEY = "test.key";
    private static final String EXPECTED_UNDERLINE_KEY = "test_key";

   @Test
   public void testMarshal() throws Exception {
       Marshaller marshaller = new JsonMarshaller();

       Map<String, Object> map = new HashMap<>();
       map.put(EventConstants.TIMESTAMP, EXPECTED_TIMESTAMP);
       map.put("c", "d");
       String jsonSt = marshaller.marshal(new Event(EXPECTED_TOPIC, map));
       System.out.println(jsonSt);
       JsonReader reader = Json.createReader(new StringReader(jsonSt));
       JsonObject jsonO = reader.readObject();
       Assert.assertEquals("Timestamp string", "2016-02-02T15:59:40,634Z",jsonO.getString("@timestamp"));
       long ts = jsonO.getJsonNumber(EventConstants.TIMESTAMP).longValue();
       Assert.assertEquals("timestamp long", EXPECTED_TIMESTAMP, ts);
       Assert.assertEquals("Topic", EXPECTED_TOPIC, jsonO.getString(EventConstants.EVENT_TOPIC.replace('.', '_')));
   }

   @Test
   public void testMarshalWithDot() throws Exception {
       JsonMarshaller marshaller = new JsonMarshaller();

       Dictionary<String, Object> config = new Hashtable<>();
       config.put("replaceDotsByUnderscores", "false");
       marshaller.activate(config);

       Map<String, Object> map = new HashMap<>();
       map.put(DOT_KEY, DOT_VALUE);
       String jsonSt = marshaller.marshal(new Event(EXPECTED_TOPIC, map));
       System.out.println(jsonSt);
       JsonReader reader = Json.createReader(new StringReader(jsonSt));
       JsonObject jsonO = reader.readObject();
       Assert.assertEquals("Value", DOT_VALUE, jsonO.getString(EXPECTED_DOT_KEY));
        try {
           jsonO.getString(EXPECTED_UNDERLINE_KEY);
	   Assert.fail("Key "+ EXPECTED_UNDERLINE_KEY + " exists");
       } catch (NullPointerException e) {
	   // This is expected
       }
   }


   @Test
   public void testMarshalWithUnderscore() throws Exception {
       JsonMarshaller marshaller = new JsonMarshaller();

       Dictionary<String, Object> config = new Hashtable<>();
       config.put("replaceDotsByUnderscores", "true");
       marshaller.activate(config);

       Map<String, Object> map = new HashMap<>();
       map.put(DOT_KEY, DOT_VALUE);
       String jsonSt = marshaller.marshal(new Event(EXPECTED_TOPIC, map));
       System.out.println(jsonSt);
       JsonReader reader = Json.createReader(new StringReader(jsonSt));
       JsonObject jsonO = reader.readObject();
       Assert.assertEquals("Value", DOT_VALUE, jsonO.getString(EXPECTED_UNDERLINE_KEY));
       try {
           jsonO.getString(EXPECTED_DOT_KEY);
	   Assert.fail("Key "+ EXPECTED_DOT_KEY + " exists");
       } catch (NullPointerException e) {
	   // This is expected
       }
   }

   @Test
   public void testInnerMap() throws Exception {
       Marshaller marshaller = new JsonMarshaller();

       Map<String, Object> map = new HashMap<>();
       map.put(EventConstants.TIMESTAMP, EXPECTED_TIMESTAMP);
       map.put("test", "test");
       Map<String, Object> inner = new HashMap<>();
       inner.put("other", "other");
       map.put("inner", inner);

       String jsonString = marshaller.marshal(new Event(EXPECTED_TOPIC, map));

       System.out.println(jsonString);

       JsonReader reader = Json.createReader(new StringReader(jsonString));
       JsonObject jsonObject = reader.readObject();
       Assert.assertEquals("Timestamp string", "2016-02-02T15:59:40,634Z", jsonObject.getString("@timestamp"));
       long ts = jsonObject.getJsonNumber(EventConstants.TIMESTAMP).longValue();
       Assert.assertEquals("timestamp long", EXPECTED_TIMESTAMP, ts);

       Assert.assertEquals("test", jsonObject.getString("test"));

       JsonObject innerObject = jsonObject.getJsonObject("inner");
       Assert.assertEquals("other", innerObject.getString("other"));
   }

}