ProcessorTest.java

/*
 * Created by Andrey Cherkashin (acherkashin)
 * http://acherkashin.me
 * 
 * License
 * Copyright (c) 2015 Andrey Cherkashin
 * The project released under the MIT license: http://opensource.org/licenses/MIT
 */
package ragefist.core;

import java.util.ArrayList;
import java.util.List;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

/**
 *
 * @author acherkashin
 */
public class ProcessorTest
{
	private Processor _processor;
	private List<Integer> _testList;
	
	@Before
	public void setUp() {
		_processor = new Processor();
		_testList  = new ArrayList<>();
	}
	
	private abstract class TestProcessorTask extends ProcessorTask {
		private final List<Integer> _testListRef;
		private TestProcessorTask(List<Integer> testList) {
			_testListRef = testList;
		}
	}

	@Test
	public void testTaskProcessing() {
		TestProcessorTask task = new TestProcessorTask(_testList)
		{
			@Override
			protected boolean _executeImpl(Processor processor) {
				_testList.add(1);
				return true;
			}
		};
		
		// adding a task
		_processor.addTask(task);
		Assert.assertEquals(0, _testList.size());
		
		// processing tasks
		_processor.processTasks();
		Assert.assertEquals(1, _testList.size());
	}
	
	@Test
	public void testTasksChain() {
		TestProcessorTask task1 = new TestProcessorTask(_testList)
		{
			@Override
			protected boolean _executeImpl(Processor processor) {
				_testList.add(1);
				return true;
			}
		};
		TestProcessorTask task2 = new TestProcessorTask(_testList)
		{
			@Override
			protected boolean _executeImpl(Processor processor) {
				_testList.add(2);
				return false; // returning FALSE
			}
		};
		TestProcessorTask task3 = new TestProcessorTask(_testList)
		{
			@Override
			protected boolean _executeImpl(Processor processor) {
				_testList.add(3);
				return true;
			}
		};
		task2.setNextTask(task3);
		task1.setNextTask(task2);
		_processor.addTask(task1);
		
		// check we have only one task in a queue
		Assert.assertEquals(1, _processor.getTasksCount());
		Assert.assertEquals(0, _testList.size());
		
		// processing
		_processor.processTasks();
		
		// check our chain is processed even though task #2 failed
		Assert.assertEquals(3, _testList.size());
		Assert.assertTrue(1 == _testList.get(0));
		Assert.assertTrue(2 == _testList.get(1));
		Assert.assertTrue(3 == _testList.get(2));
	}
}