| /* |
| * 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.geode.internal; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.fail; |
| |
| import org.junit.Test; |
| |
| |
| /** |
| * Tests UniqueIdGenerator. |
| * |
| * @since GemFire 5.0.2 (cbb5x_PerfScale) |
| */ |
| public class UniqueIdGeneratorJUnitTest { |
| |
| @Test |
| public void testBasics() throws Exception { |
| UniqueIdGenerator uig = new UniqueIdGenerator(1); |
| assertEquals(0, uig.obtain()); |
| try { |
| uig.obtain(); |
| fail("expected IllegalStateException"); |
| } catch (IllegalStateException expected) { |
| } |
| uig.release(0); |
| assertEquals(0, uig.obtain()); |
| |
| uig = new UniqueIdGenerator(32768); |
| for (int i = 0; i < 32768; i++) { |
| assertEquals(i, uig.obtain()); |
| } |
| try { |
| uig.obtain(); |
| fail("expected IllegalStateException"); |
| } catch (IllegalStateException expected) { |
| } |
| for (int i = 32767; i >= 0; i--) { |
| uig.release(i); |
| assertEquals(i, uig.obtain()); |
| } |
| } |
| } |