ChangeSetIteratorTest.java

/*
 * Hibernate Search, full-text search for your domain model
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later
 * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
 */
package org.hibernate.search.test.backend.lucene;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.NoSuchElementException;

import org.hibernate.search.backend.AddLuceneWork;
import org.hibernate.search.backend.LuceneWork;
import org.hibernate.search.backend.OptimizeLuceneWork;
import org.hibernate.search.backend.PurgeAllLuceneWork;
import org.hibernate.search.backend.UpdateLuceneWork;
import org.hibernate.search.backend.impl.lucene.Changeset;
import org.hibernate.search.backend.impl.lucene.ChangesetList;
import org.hibernate.search.testsupport.TestForIssue;
import org.junit.Assert;
import org.junit.Test;

/**
 * Unit tests for the iterator functionality of org.hibernate.search.backend.impl.lucene.ChangesetList
 * @author Sanne Grinovero (C) 2015 Red Hat Inc.
 */
@TestForIssue(jiraKey = "HSEARCH-1769")
public class ChangeSetIteratorTest {

	@Test
	public void testOutherIteratorBeingEmpty() {
		ChangesetList list = new ChangesetList( new ArrayList<Changeset>( 2 ) );
		Iterator<LuceneWork> iterator = list.iterator();
		Assert.assertFalse( iterator.hasNext() );
	}

	@Test
	public void testOutherIteratorBeingEmptyException() {
		ChangesetList list = new ChangesetList( new ArrayList<Changeset>( 2 ) );
		Iterator<LuceneWork> iterator = list.iterator();
		try {
			iterator.next();
			Assert.fail( "Should have thrown the exception" );
		}
		catch (NoSuchElementException e) {
			//All good
		}
	}

	@Test
	public void testInnerIteratorBeingEmpty() {
		ArrayList<Changeset> outher = new ArrayList<Changeset>( 2 );
		outher.add( new Changeset( new ArrayList<LuceneWork>( 2 ), null, null ) );
		outher.add( new Changeset( new ArrayList<LuceneWork>( 2 ), null, null ) );
		ChangesetList list = new ChangesetList( outher );
		Iterator<LuceneWork> iterator = list.iterator();
		Assert.assertFalse( "Iterator should have been empty", iterator.hasNext() );
	}

	@Test
	public void testInnerIteratorBeingEmptyException() {
		ArrayList<Changeset> outher = new ArrayList<Changeset>( 2 );
		outher.add( new Changeset( new ArrayList<LuceneWork>( 2 ), null, null ) );
		outher.add( new Changeset( new ArrayList<LuceneWork>( 2 ), null, null ) );
		ChangesetList list = new ChangesetList( outher );
		Iterator<LuceneWork> iterator = list.iterator();
		try {
			iterator.next();
			Assert.fail( "Should have thrown the exception" );
		}
		catch (NoSuchElementException e) {
			//All good
		}
	}

	@Test
	public void testInnerIteratorSingleEmpty() {
		ArrayList<LuceneWork> workListOne = new ArrayList<LuceneWork>( 2 );
		workListOne.add( new PurgeAllLuceneWork( Object.class ) );
		ArrayList<Changeset> outher = new ArrayList<Changeset>( 2 );
		outher.add( new Changeset( workListOne, null, null ) );
		ChangesetList list = new ChangesetList( outher );
		Iterator<LuceneWork> iterator = list.iterator();
		Assert.assertTrue( "Iterator should contain some elements", iterator.hasNext() );
		Assert.assertTrue( iterator.next() instanceof PurgeAllLuceneWork );
	}

	@Test
	public void testFourElementsIterator() {
		ArrayList<LuceneWork> workListOne = new ArrayList<LuceneWork>( 2 );
		workListOne.add( new PurgeAllLuceneWork( Object.class ) );
		workListOne.add( new AddLuceneWork( null, null, null, null ) );
		ArrayList<LuceneWork> workListTwo = new ArrayList<LuceneWork>( 2 );
		workListTwo.add( new OptimizeLuceneWork( Object.class ) );
		workListTwo.add( new UpdateLuceneWork( null, null, null, null ) );
		ArrayList<Changeset> outher = new ArrayList<Changeset>( 2 );
		outher.add( new Changeset( workListOne, null, null ) );
		outher.add( new Changeset( workListTwo, null, null ) );
		ChangesetList list = new ChangesetList( outher );
		Iterator<LuceneWork> iterator = list.iterator();
		Assert.assertTrue( "Iterator should contain some elements", iterator.hasNext() );
		Assert.assertTrue( iterator.next() instanceof PurgeAllLuceneWork );
		iterator.hasNext();
		Assert.assertTrue( iterator.next() instanceof AddLuceneWork );
		iterator.hasNext();
		Assert.assertTrue( iterator.next() instanceof OptimizeLuceneWork );
		iterator.hasNext();
		Assert.assertTrue( iterator.next() instanceof UpdateLuceneWork );
	}

}