/*
    * 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.commons.scxml2;
  
  import java.util.Set;
  
  import org.apache.commons.scxml2.model.EnterableState;
  import org.apache.commons.scxml2.model.TransitionTarget;
  import org.junit.Assert;
  import org.junit.Test;
  /**
   * Unit tests for testing conflict resolution amongst multiple transitions
   * within the {@link org.apache.commons.scxml2.SCXMLExecutor}'s default
   * semantics.
   *
   * Upto v0.6, non-deterministic behavior leads to an error condition. Based
   * on the February 2007 WD, such non-determinism should now be resolved
   * based on document order and heirarchy of states within the state machine.
   * This class tests various such cases where more than one candidate
   * transition exists at a particular point, and tie-breaking rules are used
   * to make progress, rather than resulting in error conditions.
   */
  public class TieBreakerTest {
  
      @Test
      public void testTieBreaker01() throws Exception {
          SCXMLExecutor exec = SCXMLTestHelper.getExecutor("org/apache/commons/scxml2/tie-breaker-01.xml");
          exec.go();
          Set<EnterableState> currentStates = exec.getStatus().getStates();
          Assert.assertEquals(1, currentStates.size());
          Assert.assertEquals("ten", currentStates.iterator().next().getId());
          currentStates = SCXMLTestHelper.fireEvent(exec, "done.state.ten");
          Assert.assertEquals(1, currentStates.size());
          Assert.assertEquals("twenty", currentStates.iterator().next().getId());
      }
  
      @Test
      public void testTieBreaker02() throws Exception {
          SCXMLExecutor exec = SCXMLTestHelper.getExecutor("org/apache/commons/scxml2/tie-breaker-02.xml");
          exec.go();
          Set<EnterableState> currentStates = exec.getStatus().getStates();
          Assert.assertEquals(1, currentStates.size());
          Assert.assertEquals("eleven", currentStates.iterator().next().getId());
          currentStates = SCXMLTestHelper.fireEvent(exec, "done.state.ten");
          Assert.assertEquals(1, currentStates.size());
          Assert.assertEquals("thirty", currentStates.iterator().next().getId());
      }
  
      @Test
      public void testTieBreaker03() throws Exception {
          SCXMLExecutor exec = SCXMLTestHelper.getExecutor("org/apache/commons/scxml2/tie-breaker-03.xml");
          exec.go();
          Set<EnterableState> currentStates = exec.getStatus().getStates();
          Assert.assertEquals(1, currentStates.size());
          Assert.assertEquals("eleven", currentStates.iterator().next().getId());
          currentStates = SCXMLTestHelper.fireEvent(exec, "done.state.ten");
          Assert.assertEquals(1, currentStates.size());
          Assert.assertEquals("forty", currentStates.iterator().next().getId());
      }
  
      @Test
      public void testTieBreaker04() throws Exception {
          SCXMLExecutor exec = SCXMLTestHelper.getExecutor("org/apache/commons/scxml2/tie-breaker-04.xml");
          exec.go();
          Set<EnterableState> currentStates = SCXMLTestHelper.fireEvent(exec, "event_2");
          Assert.assertEquals(1, currentStates.size());
          currentStates = SCXMLTestHelper.fireEvent(exec, "event_1");
          Assert.assertEquals(1, currentStates.size());
      }
  
      @Test
      public void testTieBreaker05() throws Exception {
          SCXMLExecutor exec = SCXMLTestHelper.getExecutor("org/apache/commons/scxml2/tie-breaker-05.xml");
          exec.go();
          Set<EnterableState> currentStates = exec.getStatus().getStates();
          Assert.assertEquals(3, currentStates.size());
          for (TransitionTarget tt : currentStates) {
              String id = tt.getId();
              Assert.assertTrue(id.equals("s11") || id.equals("s212")
                  || id.equals("s2111"));
          }
          currentStates = SCXMLTestHelper.fireEvent(exec, "event1");
          Assert.assertEquals(3, currentStates.size());
          for (TransitionTarget tt : currentStates) {
              String id = tt.getId();
             Assert.assertTrue(id.equals("s12") || id.equals("s212")
                 || id.equals("s2112"));
         }
     }
 
     @Test
     public void testTieBreaker06() throws Exception {
         SCXMLExecutor exec = SCXMLTestHelper.getExecutor("org/apache/commons/scxml2/tie-breaker-06.xml");
         exec.go();
         Set<EnterableState> currentStates = exec.getStatus().getStates();
         Assert.assertEquals(1, currentStates.size());
     }
 }