TopEntriesCollectorJUnitTest.java example

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 * 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
 * 
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package org.apache.geode.cache.lucene.internal.distributed;

import static org.junit.Assert.*;

import java.util.ArrayList;
import java.util.List;

import org.junit.Before;
import org.junit.Test;
import org.junit.experimental.categories.Category;

import org.apache.geode.CopyHelper;
import org.apache.geode.cache.lucene.internal.LuceneServiceImpl;
import org.apache.geode.cache.lucene.internal.distributed.TopEntriesCollectorManager.ListScanner;
import org.apache.geode.test.junit.categories.UnitTest;

@Category(UnitTest.class)
public class TopEntriesCollectorJUnitTest {

  private EntryScore<String> r1_1 = new EntryScore<String>("1-1", .9f);
  private EntryScore<String> r1_2 = new EntryScore<String>("1-2", .7f);
  private EntryScore<String> r1_3 = new EntryScore<String>("1-3", .5f);

  private EntryScore<String> r2_1 = new EntryScore<String>("2-1", .85f);
  private EntryScore<String> r2_2 = new EntryScore<String>("2-2", .65f);

  private EntryScore<String> r3_1 = new EntryScore<String>("3-1", .8f);
  private EntryScore<String> r3_2 = new EntryScore<String>("3-2", .6f);
  private EntryScore<String> r3_3 = new EntryScore<String>("3-3", .4f);

  private TopEntriesCollectorManager manager;

  @Before
  public void setup() {
    manager = new TopEntriesCollectorManager();
  }

  @Test
  public void testReduce() throws Exception {
    TopEntriesCollector c1 = manager.newCollector("c1");
    c1.collect(r1_1.getKey(), r1_1.getScore());
    c1.collect(r1_2.getKey(), r1_2.getScore());
    c1.collect(r1_3.getKey(), r1_3.getScore());

    TopEntriesCollector c2 = manager.newCollector("c2");
    c2.collect(r2_1.getKey(), r2_1.getScore());
    c2.collect(r2_2.getKey(), r2_2.getScore());

    TopEntriesCollector c3 = manager.newCollector("c3");
    c3.collect(r3_1.getKey(), r3_1.getScore());
    c3.collect(r3_2.getKey(), r3_2.getScore());
    c3.collect(r3_3.getKey(), r3_3.getScore());

    List<TopEntriesCollector> collectors = new ArrayList<>();
    collectors.add(c1);
    collectors.add(c2);
    collectors.add(c3);

    TopEntriesCollector hits = manager.reduce(collectors);
    assertEquals(8, hits.getEntries().getHits().size());
    TopEntriesJUnitTest.verifyResultOrder(hits.getEntries().getHits(), r1_1, r2_1, r3_1, r1_2, r2_2,
        r3_2, r1_3, r3_3);

    // input collector should not change
    assertEquals(3, c1.getEntries().getHits().size());
    assertEquals(2, c2.getEntries().getHits().size());
    assertEquals(3, c3.getEntries().getHits().size());
    // TopEntriesJUnitTest.verifyResultOrder(c1.getEntries().getHits(), r1_1, r2_1, r3_1, r1_2,
    // r2_2, r3_2, r1_3, r3_3);
  }

  @Test
  public void testInitialization() {
    TopEntriesCollector collector = new TopEntriesCollector("name");
    assertEquals("name", collector.getName());
    assertEquals(0, collector.size());
  }

  @Test
  public void testSerialization() {
    LuceneServiceImpl.registerDataSerializables();
    TopEntriesCollectorManager manager = new TopEntriesCollectorManager("id", 213);
    TopEntriesCollectorManager copy = CopyHelper.deepCopy(manager);
    assertEquals("id", copy.getId());
    assertEquals(213, copy.getLimit());
  }

  @Test
  public void testCollectorSerialization() {
    LuceneServiceImpl.registerDataSerializables();
    TopEntriesCollector collector = new TopEntriesCollector("collector", 345);
    TopEntriesCollector copy = CopyHelper.deepCopy(collector);
    assertEquals("collector", copy.getName());
    assertEquals(345, copy.getEntries().getLimit());
  }

  @Test
  public void testScannerDoesNotMutateHits() {
    TopEntriesCollector c1 = manager.newCollector("c1");
    c1.collect(r1_1.getKey(), r1_1.getScore());
    c1.collect(r1_2.getKey(), r1_2.getScore());
    c1.collect(r1_3.getKey(), r1_3.getScore());

    assertEquals(3, c1.getEntries().getHits().size());
    TopEntriesJUnitTest.verifyResultOrder(c1.getEntries().getHits(), r1_1, r1_2, r1_3);

    ListScanner scanner = new ListScanner(c1.getEntries().getHits());
    assertTrue(scanner.hasNext());
    assertEquals(r1_1.getKey(), scanner.peek().getKey());
    assertEquals(r1_1.getKey(), scanner.next().getKey());
    assertTrue(scanner.hasNext());
    assertEquals(r1_2.getKey(), scanner.peek().getKey());
    assertEquals(r1_2.getKey(), scanner.next().getKey());
    assertTrue(scanner.hasNext());
    assertEquals(r1_3.getKey(), scanner.peek().getKey());
    assertEquals(r1_3.getKey(), scanner.next().getKey());
    assertFalse(scanner.hasNext());

    assertEquals(3, c1.getEntries().getHits().size());
    TopEntriesJUnitTest.verifyResultOrder(c1.getEntries().getHits(), r1_1, r1_2, r1_3);
  }
}