/*
* Copyright (c) 2008-2017, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.util;
import com.hazelcast.test.HazelcastParallelClassRunner;
import com.hazelcast.test.annotation.ParallelTest;
import com.hazelcast.test.annotation.QuickTest;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;
import static org.junit.Assert.assertTrue;
@RunWith(HazelcastParallelClassRunner.class)
@Category({QuickTest.class, ParallelTest.class})
public class StateMachineTest {
private enum State {
A, B, C
}
private StateMachine<State> machine = StateMachine.of(State.A).withTransition(State.A, State.B)
.withTransition(State.B, State.C);
@Test
public void testIsInInitialState_whenCreated() {
assertTrue(machine.is(State.A));
}
@Test
public void testChangesState_whenTransitionValid() {
machine.next(State.B);
assertTrue(machine.is(State.B));
machine.next(State.C);
assertTrue(machine.is(State.C));
}
@Test(expected = IllegalStateException.class)
public void testThrowsException_whenTransitionInvalid() {
machine.next(State.C);
}
@Test
public void testStaysAtState_whenAlreadyThere() {
machine.nextOrStay(State.A);
assertTrue(machine.is(State.A));
}
}