// $Id: TestActivityGraphStateMachine.java 14374 2008-04-17 21:46:30Z tfmorris $
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package org.argouml.model;

import java.util.Collection;

import junit.framework.TestCase;

import org.apache.log4j.Logger;


/**
 * Tests for the state machines in an ActivityGraph.
 * 
 * @author Tom Morris
 */
public class TestActivityGraphStateMachine extends TestCase {

    private static final Logger LOG = 
        Logger.getLogger(TestActivityGraphStateMachine.class);
    
    /**
     * The constructor.
     *
     * @param n the name
     */
    public TestActivityGraphStateMachine(String n) {
	super(n);
        InitializeModel.initializeDefault();
    }

    @Override
    public void setUp() throws Exception {
	super.setUp();
    }

     
    /**
     * Test that enclosed states get deleted along with their state machine.
     * <p>
     * NOTE: This needs a clean environment to start, so it can't go in the
     * same suite with any tests which leave residue in the model repository.
     */
    public void testDeleteStateMachineTop() {
        // Make sure we start off clean
       
        // TODO: This doesn't work, but should
//        Collection elements = Model.getFacade().getRootElements();
//        Model.getUmlHelper().deleteCollection(elements);
//        elements = Model.getFacade().getRootElements();
//        assertTrue("Failed to create clean environment", elements.isEmpty());
        
        // Build an activity graph with a single action state 
        // the way the GUI would
        Object model = Model.getModelManagementFactory().createModel();
        LOG.debug("Created model "  + model);
        Object activityGraph = Model.getActivityGraphsFactory()
                .buildActivityGraph(model);
        LOG.debug("Created activity graph "  + activityGraph);
        Object top = Model.getFacade().getTop(activityGraph);
        assertNotNull("Activity graph got created without a top state", top);
        LOG.debug("top state "  + top);

        Object actionState = Model.getActivityGraphsFactory()
                .createActionState();
        LOG.debug("Created action state "  + top);
        Model.getStateMachinesHelper().setContainer(actionState, top);

        Collection subs = Model.getFacade().getSubvertices(top);
        assertEquals("setContainer didn't work", actionState, 
                subs.iterator().next());

        Collection roots = Model.getFacade().getRootElements();
        assertEquals("More than one root element", 1, roots.size());
        assertEquals("Wrong root element", model, roots.iterator().next());
        
        // Delete the model and make sure everything inside goes with it
        Model.getUmlFactory().delete(model);
        Collection theDregs = Model.getFacade().getRootElements();
        assertTrue("Failed to delete all elements from an activity graph",
                theDregs.isEmpty());
    }
}