/*
    *  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.mina.statemachine;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertSame;
  
  import org.apache.mina.statemachine.context.DefaultStateContext;
  import org.apache.mina.statemachine.context.StateContext;
  import org.apache.mina.statemachine.event.Event;
  import org.apache.mina.statemachine.transition.AbstractTransition;
  import org.junit.Test;
  
  /**
   * Tests {@link StateMachine}.
   *
   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
   */
  public class StateMachineTest {
  
      @Test
      public void testBreakAndContinue() throws Exception {
          State s1 = new State("s1");
          s1.addTransition(new BreakAndContinueTransition("foo"));
          s1.addTransition(new SuccessTransition("foo"));
  
          StateContext context = new DefaultStateContext();
          StateMachine sm = new StateMachine(new State[] { s1 }, "s1");
          sm.handle(new Event("foo", context));
          assertEquals(true, context.getAttribute("success"));
      }
      
      @Test
      public void testBreakAndGotoNow() throws Exception {
          State s1 = new State("s1");
          State s2 = new State("s2");
          s1.addTransition(new BreakAndGotoNowTransition("foo", "s2"));
          s2.addTransition(new SuccessTransition("foo"));
  
          StateContext context = new DefaultStateContext();
          StateMachine sm = new StateMachine(new State[] { s1, s2 }, "s1");
          sm.handle(new Event("foo", context));
          assertEquals(true, context.getAttribute("success"));
      }
      
      @Test
      public void testBreakAndGotoNext() throws Exception {
          State s1 = new State("s1");
          State s2 = new State("s2");
          s1.addTransition(new BreakAndGotoNextTransition("foo", "s2"));
          s2.addTransition(new SuccessTransition("foo"));
  
          StateContext context = new DefaultStateContext();
          StateMachine sm = new StateMachine(new State[] { s1, s2 }, "s1");
          sm.handle(new Event("foo", context));
          assertSame(s2, context.getCurrentState());
          sm.handle(new Event("foo", context));
          assertEquals(true, context.getAttribute("success"));
      }
  
      private static class SuccessTransition extends AbstractTransition {
          public SuccessTransition(Object eventId) {
              super(eventId);
          }
  
          public SuccessTransition(Object eventId, State nextState) {
              super(eventId, nextState);
          }
  
          @Override
          protected boolean doExecute(Event event) {
              event.getContext().setAttribute("success", true);
              return true;
          }
      }
      
      private static class BreakAndContinueTransition extends AbstractTransition {
          public BreakAndContinueTransition(Object eventId) {
              super(eventId);
          }
  
          public BreakAndContinueTransition(Object eventId, State nextState) {
             super(eventId, nextState);
         }
 
         @Override
         protected boolean doExecute(Event event) {
             StateControl.breakAndContinue();
             return true;
         }
     }
     
     private static class BreakAndGotoNowTransition extends AbstractTransition {
         private final String stateId;
 
         public BreakAndGotoNowTransition(Object eventId, String stateId) {
             super(eventId);
             this.stateId = stateId;
         }
 
         public BreakAndGotoNowTransition(Object eventId, State nextState, String stateId) {
             super(eventId, nextState);
             this.stateId = stateId;
         }
 
         @Override
         protected boolean doExecute(Event event) {
             StateControl.breakAndGotoNow(stateId);
             return true;
         }
     }
 
     private static class BreakAndGotoNextTransition extends AbstractTransition {
         private final String stateId;
 
         public BreakAndGotoNextTransition(Object eventId, String stateId) {
             super(eventId);
             this.stateId = stateId;
         }
 
         public BreakAndGotoNextTransition(Object eventId, State nextState, String stateId) {
             super(eventId, nextState);
             this.stateId = stateId;
         }
 
         @Override
         protected boolean doExecute(Event event) {
             StateControl.breakAndGotoNext(stateId);
             return true;
         }
     }
 }