library/src/test/java/com/datatorrent/lib/appdata/snapshot/AppDataSnapshotServerMapTest.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 com.datatorrent.lib.appdata.snapshot;

import java.util.List;
import java.util.Map;

import org.codehaus.jettison.json.JSONObject;
import org.junit.Assert;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.collect.Lists;
import com.google.common.collect.Maps;

import com.datatorrent.lib.testbench.CollectorTestSink;
import com.datatorrent.lib.util.KryoCloneUtils;

public class AppDataSnapshotServerMapTest
{
  public static final String SIMPLE_RESULT = "{\"id\":\"1\"," +
      "\"type\":\"dataQuery\",\"data\":[{\"count\":\"2\",\"word\":\"a\"},{\"count\":\"3\"," +
      "\"word\":\"b\"}],\"countdown\":10}";

  public static final String SIMPLE_QUERY = "{\"id\": \"1\",\n"
      + "\"type\": \"dataQuery\",\n"
      + "\"data\": {\n"
      + "\"fields\": [ \"word\", \"count\" ]\n"
      + "},\n"
      + "\"countdown\":10\n"
      + "}";

  public static final String SIMPLE_SCHEMA = "{\n"
      + "  \"values\": [{\"name\": \"word\", \"type\": \"string\"},\n"
      + "             {\"name\": \"count\", \"type\": \"integer\"}]\n"
      + "}";

  @Test
  public void simpleTest() throws Exception
  {
    AppDataSnapshotServerMap snapshotServer = new AppDataSnapshotServerMap();

    snapshotServer.setSnapshotSchemaJSON(SIMPLE_SCHEMA);

    //// Input Data

    List<Map<String, Object>> dataList = Lists.newArrayList();
    Map<String, Object> data = Maps.newHashMap();
    data.put("word", "a");
    data.put("count", 2);

    Map<String, Object> data1 = Maps.newHashMap();
    data1.put("word", "b");
    data1.put("count", 3);

    dataList.add(data);
    dataList.add(data1);

    ////

    CollectorTestSink<String> resultSink = new CollectorTestSink<String>();
    @SuppressWarnings({"unchecked", "rawtypes"})
    CollectorTestSink<Object> tempResultSink = (CollectorTestSink)resultSink;
    snapshotServer.queryResult.setSink(tempResultSink);

    snapshotServer.setup(null);

    snapshotServer.beginWindow(0L);
    snapshotServer.input.put(dataList);
    snapshotServer.endWindow();

    snapshotServer.beginWindow(1L);
    snapshotServer.query.put(SIMPLE_QUERY);
    snapshotServer.endWindow();

    String result = (String)tempResultSink.collectedTuples.get(0);

    Assert.assertEquals("Should get only 1 result back", 1, tempResultSink.collectedTuples.size());
    Assert.assertEquals("Countdown incorrect", 10, new JSONObject(result).getInt("countdown"));
    Assert.assertEquals("Num results", 2, new JSONObject(result).getJSONArray("data").length());

    JSONObject firstRow = new JSONObject(result).getJSONArray("data").getJSONObject(0);
    JSONObject secondRow = new JSONObject(result).getJSONArray("data").getJSONObject(1);

    Assert.assertEquals(2, firstRow.getInt("count"));
    Assert.assertEquals("a", firstRow.getString("word"));

    Assert.assertEquals(3, secondRow.getInt("count"));
    Assert.assertEquals("b", secondRow.getString("word"));

    //Test serialization
    KryoCloneUtils.cloneObject(snapshotServer);
  }

  private static final Logger LOG = LoggerFactory.getLogger(AppDataSnapshotServerMapTest.class);
}