/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding 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
 *
 * 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 org.apache.samoa.topology.impl;

import static org.junit.Assert.*;

import java.util.Set;

import mockit.Expectations;
import mockit.Mocked;
import mockit.Tested;

import org.apache.samoa.core.EntranceProcessor;
import org.apache.samoa.topology.EntranceProcessingItem;
import org.apache.samoa.topology.impl.ThreadsEntranceProcessingItem;
import org.apache.samoa.topology.impl.ThreadsTopology;
import org.junit.Before;
import org.junit.Test;

/**
 * @author Anh Thu Vu
 * 
 */
public class ThreadsTopologyTest {

  @Tested
  private ThreadsTopology topology;

  @Mocked
  private ThreadsEntranceProcessingItem entrancePi;
  @Mocked
  private EntranceProcessor entranceProcessor;

  @Before
  public void setUp() throws Exception {
    topology = new ThreadsTopology("TestTopology");
  }

  @Test
  public void testAddEntrancePi() {
    topology.addEntranceProcessingItem(entrancePi);
    Set<EntranceProcessingItem> entrancePIs = topology.getEntranceProcessingItems();
    assertNotNull("Set of entrance PIs is null.", entrancePIs);
    assertEquals("Number of entrance PI in ThreadsTopology must be 1", 1, entrancePIs.size());
    assertSame("Entrance PI was not set correctly.", entrancePi, entrancePIs.toArray()[0]);
    // TODO: verify that entrance PI is in the set of ProcessingItems
    // Need to access topology's set of PIs (getProcessingItems() method)
  }

  @Test
  public void testRun() {
    topology.addEntranceProcessingItem(entrancePi);

    new Expectations() {
      {
        entrancePi.getProcessor();
        result = entranceProcessor;
        entranceProcessor.onCreate(anyInt);

        entrancePi.startSendingEvents();
      }
    };
    topology.run();
  }

  @Test(expected = IllegalStateException.class)
  public void testRunWithoutEntrancePI() {
    topology.run();
  }

}