wfp14miwithaprioridesigntimeknowledgetest.java

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 * full listing of individual contributors.
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 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
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 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
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 */
package org.jbpm.jpdl.patterns;

import java.util.ArrayList;
import java.util.List;

import junit.framework.TestCase;

import org.jbpm.graph.def.ProcessDefinition;
import org.jbpm.graph.exe.ProcessInstance;
import org.jbpm.graph.exe.Token;
import org.jbpm.taskmgmt.exe.TaskInstance;
import org.jbpm.taskmgmt.exe.TaskMgmtInstance;

/**
 * http://is.tm.tue.nl/research/patterns/download/swf/pat_13.swf
 */
public class Wfp14MiWithAPrioriDesigntimeKnowledgeTest extends TestCase {

  public void testSituation1() {
    ProcessDefinition pd = ProcessDefinition.parseXmlString(
      "<process-definition name='the life of a baby ?'>" +
      "  <start-state name='a'>" +
      "    <transition to='b' />" +
      "  </start-state>" +
      "  <state name='b'>" +
      "    <transition to='t' />" +
      "  </state>" +
      "  <task-node name='t'>" +
      "    <task name='eat' />" +
      "    <task name='drink' />" +
      "    <task name='sleep' />" +
      "    <transition to='c' />" +
      "  </task-node>" +
      "  <state name='c' />" +
      "</process-definition>"
    );

    ProcessInstance pi = new ProcessInstance( pd );
    TaskMgmtInstance taskMgmtInstance = (TaskMgmtInstance) pi.getInstance(TaskMgmtInstance.class);
    
    pi.signal();
    Token token = pi.getRootToken();

    // after start, the token is waiting in state b
    assertSame( pd.getNode("b"), token.getNode() );
    
    // and no tasks have been created yet
    assertEquals(0, taskMgmtInstance.getUnfinishedTasks(token).size() );

    // now we signal the process to move on.
    // execution will arrive at the task-node
    // the default behaviour of the task node is to create each task and wait till the last one finishes 
    pi.signal();

    // now, 3 tasks have been created...
    List tasks = new ArrayList( taskMgmtInstance.getUnfinishedTasks(token) );
    assertEquals(3, tasks.size());
    // ... and the process is in the task state
    assertSame( pd.getNode("t"), token.getNode() );

    // now we finish the tasks one by one
    // finish task 0
    ((TaskInstance)tasks.get(0)).end();
    
    // still 2 tasks remaining
    assertEquals(2, taskMgmtInstance.getUnfinishedTasks(token).size() );
    // and the process is still in node t
    assertSame( pd.getNode("t"), token.getNode() );
    
    // finish task 1
    ((TaskInstance)tasks.get(1)).end();
    
    // still 1 task remaining
    assertEquals(1, taskMgmtInstance.getUnfinishedTasks(token).size() );
    // and the process is still in node t
    assertSame( pd.getNode("t"), token.getNode() );
    
    // finish task 2
    ((TaskInstance)tasks.get(2)).end();
    
    // no more tasks remaining
    assertEquals(0, taskMgmtInstance.getUnfinishedTasks(token).size() );
    // and the process has moved to node c
    assertEquals( pd.getNode("c"), token.getNode() );
  }
}