StateMachineTest.java

package eu.ggnet.statemachine;


import org.junit.Test;

import static eu.ggnet.statemachine.TimerStates.*;
import static eu.ggnet.statemachine.TimerTransitions.*;
import static org.junit.Assert.*;

/**
 *
 * @author oliver.guenther
 */
public class StateMachineTest {

    @Test
    public void testMachine() throws InterruptedException {
        StateMachine<Timer> g = new StateMachine<>(new TimerStateCharacteristicsFactory());
        g.add(OFF,TURN_ON,STOPPED_ON);
        g.add(OFF,PLUG_IN,STOPPED_PLUGEDIN);
        g.add(STOPPED_PLUGEDIN,TURN_ON,RUNNING);
        g.add(STOPPED_ON,PLUG_IN,RUNNING);
        g.add(RUNNING, TURN_OFF, STOPPED_PLUGEDIN);
        g.add(RUNNING,PLUG_OUT,STOPPED_ON);
        g.add(STOPPED_ON,TURN_OFF,OFF);
        g.add(STOPPED_PLUGEDIN,PLUG_OUT,OFF);
        g.add(OFF,TURN_AROUND,OFF);
        g.add(STOPPED_ON,TURN_AROUND,STOPPED_ON);
        g.add(STOPPED_PLUGEDIN,TURN_AROUND,STOPPED_PLUGEDIN);
        g.add(RUNNING,TURN_AROUND,RUNNING);

        Timer t = new Timer(false,false,false);
        assertEquals("Timer should be OFF",OFF, g.getState(t));

        g.stateChange(t, TURN_ON);
        assertEquals(STOPPED_ON, g.getState(t));

        try {
            g.stateChange(t, TURN_ON);
            fail("TURN_ON on State STOPPED_ON is not possible");
        } catch(IllegalArgumentException e) {}

        g.stateChange(t, PLUG_IN);
        assertEquals(RUNNING, g.getState(t));
        g.stateChange(t, TURN_AROUND);
        assertEquals(RUNNING, g.getState(t));

        g.stateChange(t, TURN_OFF);
        assertEquals(STOPPED_PLUGEDIN, g.getState(t));
        g.stateChange(t, TURN_AROUND);
        assertEquals(STOPPED_PLUGEDIN, g.getState(t));
        g.stateChange(t, PLUG_OUT);
        assertEquals(OFF, g.getState(t));
        g.stateChange(t, TURN_AROUND);
        assertEquals(OFF, g.getState(t));
    }

}