package org.apache.samoa.topology.impl;

/*
 * #%L
 * SAMOA
 * %%
 * Copyright (C) 2013 Yahoo! Inc.
 * %%
 * 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.
 * #L%
 */

import static org.junit.Assert.*;
import mockit.Mocked;
import mockit.NonStrictExpectations;
import mockit.Tested;

import org.apache.samoa.core.EntranceProcessor;
import org.apache.samoa.core.Processor;
import org.apache.samoa.topology.EntranceProcessingItem;
import org.apache.samoa.topology.ProcessingItem;
import org.apache.samoa.topology.Stream;
import org.apache.samoa.topology.Topology;
import org.apache.samoa.topology.impl.ThreadsComponentFactory;
import org.apache.samoa.topology.impl.ThreadsEntranceProcessingItem;
import org.apache.samoa.topology.impl.ThreadsProcessingItem;
import org.apache.samoa.topology.impl.ThreadsStream;
import org.apache.samoa.topology.impl.ThreadsTopology;
import org.junit.Before;
import org.junit.Test;

/**
 * @author Anh Thu Vu
 * 
 */
public class ThreadsComponentFactoryTest {
  @Tested
  private ThreadsComponentFactory factory;
  @Mocked
  private Processor processor, processorReplica;
  @Mocked
  private EntranceProcessor entranceProcessor;

  private final int parallelism = 3;
  private final String topoName = "TestTopology";

  @Before
  public void setUp() throws Exception {
    factory = new ThreadsComponentFactory();
  }

  @Test
  public void testCreatePiNoParallelism() {
    new NonStrictExpectations() {
      {
        processor.newProcessor(processor);
        result = processorReplica;
      }
    };
    ProcessingItem pi = factory.createPi(processor);
    assertNotNull("ProcessingItem created is null.", pi);
    assertEquals("ProcessingItem created is not a ThreadsProcessingItem.", ThreadsProcessingItem.class, pi.getClass());
    assertEquals("Parallelism of PI is not 1", 1, pi.getParallelism(), 0);
  }

  @Test
  public void testCreatePiWithParallelism() {
    new NonStrictExpectations() {
      {
        processor.newProcessor(processor);
        result = processorReplica;
      }
    };
    ProcessingItem pi = factory.createPi(processor, parallelism);
    assertNotNull("ProcessingItem created is null.", pi);
    assertEquals("ProcessingItem created is not a ThreadsProcessingItem.", ThreadsProcessingItem.class, pi.getClass());
    assertEquals("Parallelism of PI is not ", parallelism, pi.getParallelism(), 0);
  }

  @Test
  public void testCreateStream() {
    new NonStrictExpectations() {
      {
        processor.newProcessor(processor);
        result = processorReplica;
      }
    };
    ProcessingItem pi = factory.createPi(processor);

    Stream stream = factory.createStream(pi);
    assertNotNull("Stream created is null", stream);
    assertEquals("Stream created is not a ThreadsStream.", ThreadsStream.class, stream.getClass());
  }

  @Test
  public void testCreateTopology() {
    Topology topology = factory.createTopology(topoName);
    assertNotNull("Topology created is null.", topology);
    assertEquals("Topology created is not a ThreadsTopology.", ThreadsTopology.class, topology.getClass());
  }

  @Test
  public void testCreateEntrancePi() {
    EntranceProcessingItem entrancePi = factory.createEntrancePi(entranceProcessor);
    assertNotNull("EntranceProcessingItem created is null.", entrancePi);
    assertEquals("EntranceProcessingItem created is not a ThreadsEntranceProcessingItem.",
        ThreadsEntranceProcessingItem.class, entrancePi.getClass());
    assertSame("EntranceProcessor is not set correctly.", entranceProcessor, entrancePi.getProcessor());
  }

}