1 /* 2 * Copyright (C) 2013 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.google.common.util.concurrent; 18 19 import static com.google.common.util.concurrent.Service.State.FAILED; 20 import static com.google.common.util.concurrent.Service.State.NEW; 21 import static com.google.common.util.concurrent.Service.State.RUNNING; 22 import static com.google.common.util.concurrent.Service.State.STARTING; 23 import static com.google.common.util.concurrent.Service.State.STOPPING; 24 import static com.google.common.util.concurrent.Service.State.TERMINATED; 25 26 import junit.framework.TestCase; 27 28 /** 29 * Unit tests for {@link Service} 30 */ 31 public class ServiceTest extends TestCase { 32 33 /** Assert on the comparison ordering of the State enum since we guarantee it. */ 34 public void testStateOrdering() { 35 // List every valid (direct) state transition. 36 assertLessThan(NEW, STARTING); 37 assertLessThan(NEW, TERMINATED); 38 39 assertLessThan(STARTING, RUNNING); 40 assertLessThan(STARTING, STOPPING); 41 assertLessThan(STARTING, FAILED); 42 43 assertLessThan(RUNNING, STOPPING); 44 assertLessThan(RUNNING, FAILED); 45 46 assertLessThan(STOPPING, FAILED); 47 assertLessThan(STOPPING, TERMINATED); 48 } 49 50 private static <T extends Comparable<? super T>> void assertLessThan(T a, T b) { 51 if (a.compareTo(b) >= 0) { 52 fail(String.format("Expected %s to be less than %s", a, b)); 53 } 54 } 55 } 56
