/**
 * Copyright 2009 Google 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.
 *
 */

package org.waveprotocol.wave.model.conversation;

import junit.framework.TestCase;

import org.waveprotocol.wave.model.conversation.testing.BlipTestUtils;
import org.waveprotocol.wave.model.id.IdGenerator;
import org.waveprotocol.wave.model.testing.FakeIdGenerator;
import org.waveprotocol.wave.model.util.CollectionUtils;
import org.waveprotocol.wave.model.wave.opbased.ObservableWaveView;

import java.util.Arrays;
import java.util.List;

/**
 * Tests for conversation iterators.
 *
 * @author anorth@google.com (Alex North)
 */

public class BlipIteratorsTest extends TestCase {

  private Conversation conversation;
  private ConversationBlip b1;
  private ConversationBlip b1t1b1;
  private ConversationBlip b1t1b2;
  private ConversationBlip b1t2b1;
  private ConversationBlip b2_d;
  private ConversationBlip b3;
  private ConversationBlip b3t1b1;

  @Override
  protected void setUp() throws Exception {
    super.setUp();
    conversation = buildConversation();
  }

  @Override
  protected void tearDown() throws Exception {
    super.tearDown();
  }

  /**
   * Tests that blipsBreathFirst makes breadth-first traversal and skips
   * deleted blips.
   */
  public void testBlipsBreadthFirst() {
    List<ConversationBlip> actual = CollectionUtils.newArrayList(
        BlipIterators.breadthFirst(conversation));
    assertEquals(Arrays.asList(b1, b3, b1t1b1, b1t1b2, b1t2b1, b3t1b1), actual);
  }

  private Conversation buildConversation() {
    IdGenerator idGenerator = FakeIdGenerator.create();
    ObservableWaveView waveView = ConversationTestUtils.createWaveView(idGenerator);
    ConversationView convView = WaveBasedConversationView.create(waveView, idGenerator);
    Conversation conv = convView.createRoot();
    b1 = conv.getRootThread().appendBlip();
    ConversationThread b1t1 = b1.addReplyThread();
    b1t1b1 = b1t1.appendBlip();
    b1t1b2 = b1t1.appendBlip();
    ConversationThread b1t2 = b1.addReplyThread(
        BlipTestUtils.getBodyPosition(b1) + 3);
    b1t2b1 = b1t1.appendBlip();

    b2_d = conv.getRootThread().appendBlip();
    ConversationThread b2t1 = b2_d.addReplyThread();
    ConversationBlip b2t1b1 = b2t1.appendBlip();
    b2_d.delete();

    b3 = conv.getRootThread().appendBlip();
    ConversationThread b3t1 = b3.addReplyThread();
    b3t1b1 = b3t1.appendBlip();

    return conv;
  }

}