/*
 * #%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%
 */
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();
  }

}