library/src/test/java/com/datatorrent/lib/algo/InvertIndexTest.java

/*
 * Copyright (c) 2013 DataTorrent, Inc. ALL Rights Reserved.
 *
 * Licensed 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.algo;

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

import org.junit.Assert;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.datatorrent.api.Sink;

import com.datatorrent.lib.testbench.CollectorTestSink;

/**
 *
 * Functional tests for {@link com.datatorrent.lib.algo.InvertIndex} <p>
 *
 */
public class InvertIndexTest
{
    private static Logger log = LoggerFactory.getLogger(InvertIndexTest.class);

  /**
   * Test oper logic emits correct results
   */
  @SuppressWarnings({ "rawtypes", "unchecked" })
  @Test
  public void testNodeProcessing() throws Exception
  {
    InvertIndex<String,String> oper = new InvertIndex<String,String>();
    CollectorTestSink indexSink = new CollectorTestSink();

    Sink inSink = oper.data.getSink();
    oper.index.setSink(indexSink);

    oper.beginWindow(0);

    HashMap<String, String> input = new HashMap<String, String>();

    input.put("a", "str");
    input.put("b", "str");
    inSink.put(input);

    input.clear();
    input.put("a", "str1");
    input.put("b", "str1");
    inSink.put(input);

    input.clear();
    input.put("c", "blah");
    inSink.put(input);

    input.clear();
    input.put("c", "str1");
    inSink.put(input);
    oper.endWindow();

    Assert.assertEquals("number emitted tuples", 3, indexSink.collectedTuples.size());
    for (Object o: indexSink.collectedTuples) {
      log.debug(o.toString());
      HashMap<String, ArrayList<String>> output = (HashMap<String, ArrayList<String>>)o;
      for (Map.Entry<String, ArrayList<String>> e: output.entrySet()) {
        String key = e.getKey();
        ArrayList<String> alist = e.getValue();
        if (key.equals("str1")) {
          Assert.assertEquals("Index for \"str1\" contains \"a\"", true, alist.contains("a"));
          Assert.assertEquals("Index for \"str1\" contains \"b\"", true, alist.contains("b"));
          Assert.assertEquals("Index for \"str1\" contains \"c\"", true, alist.contains("c"));
        }
        else if (key.equals("str")) {
          Assert.assertEquals("Index for \"str1\" contains \"a\"", true, alist.contains("a"));
          Assert.assertEquals("Index for \"str1\" contains \"b\"", true, alist.contains("b"));
          Assert.assertEquals("Index for \"str1\" contains \"c\"", false, alist.contains("c"));
        }
        else if (key.equals("blah")) {
          Assert.assertEquals("Index for \"str1\" contains \"a\"", false, alist.contains("a"));
          Assert.assertEquals("Index for \"str1\" contains \"b\"", false, alist.contains("b"));
          Assert.assertEquals("Index for \"str1\" contains \"c\"", true, alist.contains("c"));
        }
      }
    }
  }
}