| /** |
| * 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.ratis.util; |
| |
| import org.apache.ratis.util.function.TriConsumer; |
| import org.junit.jupiter.api.Test; |
| import org.junit.jupiter.api.Timeout; |
| |
| import static org.apache.ratis.util.LifeCycle.State.*; |
| import static org.junit.jupiter.api.Assertions.assertEquals; |
| import static org.junit.jupiter.api.Assertions.assertFalse; |
| import static org.junit.jupiter.api.Assertions.assertTrue; |
| |
| import java.util.*; |
| |
| public class TestLifeCycle { |
| /** |
| * Test if the successor map and the predecessor map are consistent. |
| * {@link LifeCycle} uses predecessors to validate transitions |
| * while this test uses successors. |
| */ |
| @Test |
| @Timeout(value = 1) |
| public void testIsValid() { |
| final Map<LifeCycle.State, List<LifeCycle.State>> successors |
| = new EnumMap<>(LifeCycle.State.class); |
| put(NEW, successors, STARTING, CLOSED); |
| put(STARTING, successors, NEW, RUNNING, CLOSING, EXCEPTION); |
| put(RUNNING, successors, CLOSING, PAUSING, EXCEPTION); |
| put(PAUSING, successors, PAUSED, CLOSING, EXCEPTION); |
| put(PAUSED, successors, STARTING, CLOSING); |
| put(EXCEPTION, successors, CLOSING); |
| put(CLOSING , successors, CLOSED); |
| put(CLOSED, successors); |
| |
| final List<LifeCycle.State> states = Arrays.asList(LifeCycle.State.values()); |
| states.forEach( |
| from -> states.forEach( |
| to -> assertEquals(successors.get(from).contains(to), |
| isValid(from, to), from + " -> " + to))); |
| } |
| |
| @Test |
| public void validTransitions() { |
| testValidTransition((from, subject, to) -> assertTrue(subject.compareAndTransition(from, to))); |
| testValidTransition((from, subject, to) -> subject.transition(to)); |
| testValidTransition((from, subject, to) -> assertEquals(to, subject.transitionAndGet(any -> to))); |
| testValidTransition((from, subject, to) -> subject.transitionIfNotEqual(to)); |
| testValidTransition((from, subject, to) -> assertTrue(subject.transitionIfValid(to))); |
| } |
| |
| private static void testValidTransition(TriConsumer<LifeCycle.State, LifeCycle, LifeCycle.State> op) { |
| LifeCycle subject = new LifeCycle("subject"); |
| for (LifeCycle.State to : new LifeCycle.State[] { STARTING, RUNNING, PAUSING, PAUSED, CLOSING, CLOSED }) { |
| LifeCycle.State from = subject.getCurrentState(); |
| op.accept(from, subject, to); |
| assertEquals(to, subject.getCurrentState()); |
| } |
| } |
| |
| @Test |
| public void invalidTransitions() { |
| testInvalidTransition((from, subject, to) -> subject.compareAndTransition(from, to), true); |
| testInvalidTransition((from, subject, to) -> subject.transition(to), true); |
| testInvalidTransition((from, subject, to) -> subject.transitionIfNotEqual(to), true); |
| testInvalidTransition((from, subject, to) -> assertFalse(subject.transitionIfValid(to)), false); |
| testInvalidTransition((from, subject, to) -> subject.transitionAndGet(any -> to), true); |
| } |
| |
| private static void testInvalidTransition(TriConsumer<LifeCycle.State, LifeCycle, LifeCycle.State> op, boolean shouldThrow) { |
| LifeCycle subject = new LifeCycle("subject"); |
| for (LifeCycle.State to : new LifeCycle.State[] { RUNNING, EXCEPTION, CLOSING }) { |
| LifeCycle.State from = subject.getCurrentState(); |
| try { |
| op.accept(from, subject, to); |
| assertFalse(shouldThrow); |
| } catch (IllegalStateException e) { |
| assertTrue(shouldThrow); |
| assertEquals(from, subject.getCurrentState(), "Should be in original state"); |
| } |
| } |
| } |
| |
| } |