| /* |
| * 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.jasper.util; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertNull; |
| |
| import org.junit.Test; |
| |
| |
| public class TestFastRemovalDequeue { |
| |
| @Test |
| public void testSinglePushPop() throws Exception { |
| FastRemovalDequeue<Object> q = new FastRemovalDequeue<>(2); |
| |
| Object o1 = new Object(); |
| |
| q.push(o1); |
| |
| Object r = q.pop(); |
| |
| assertEquals(o1, r); |
| assertNull(q.first); |
| assertNull(q.last); |
| } |
| |
| |
| @Test |
| public void testDoublePushPop() throws Exception { |
| FastRemovalDequeue<Object> q = new FastRemovalDequeue<>(2); |
| |
| Object o1 = new Object(); |
| Object o2 = new Object(); |
| |
| q.push(o1); |
| q.push(o2); |
| |
| assertEquals(o2, q.first.getContent()); |
| assertEquals(o1, q.last.getContent()); |
| |
| Object r1 = q.pop(); |
| |
| assertEquals(o1, r1); |
| assertEquals(o2, q.first.getContent()); |
| assertEquals(o2, q.last.getContent()); |
| |
| |
| Object r2 = q.pop(); |
| assertEquals(o2, r2); |
| assertNull(q.first); |
| assertNull(q.last); |
| } |
| |
| |
| @Test |
| public void testSingleUnpopPop() throws Exception { |
| FastRemovalDequeue<Object> q = new FastRemovalDequeue<>(2); |
| |
| Object o1 = new Object(); |
| |
| q.unpop(o1); |
| |
| Object r = q.pop(); |
| |
| assertEquals(o1, r); |
| assertNull(q.first); |
| assertNull(q.last); |
| } |
| |
| |
| @Test |
| public void testDoubleUnpopPop() throws Exception { |
| FastRemovalDequeue<Object> q = new FastRemovalDequeue<>(2); |
| |
| Object o1 = new Object(); |
| Object o2 = new Object(); |
| |
| q.unpop(o1); |
| q.unpop(o2); |
| |
| assertEquals(o1, q.first.getContent()); |
| assertEquals(o2, q.last.getContent()); |
| |
| Object r2 = q.pop(); |
| |
| assertEquals(o2, r2); |
| assertEquals(o1, q.first.getContent()); |
| assertEquals(o1, q.last.getContent()); |
| |
| |
| Object r1 = q.pop(); |
| assertEquals(o1, r1); |
| assertNull(q.first); |
| assertNull(q.last); |
| } |
| |
| |
| @Test |
| public void testSinglePushUnpush() throws Exception { |
| FastRemovalDequeue<Object> q = new FastRemovalDequeue<>(2); |
| |
| Object o1 = new Object(); |
| |
| q.push(o1); |
| |
| Object r = q.unpush(); |
| |
| assertEquals(o1, r); |
| assertNull(q.first); |
| assertNull(q.last); |
| } |
| |
| |
| @Test |
| public void testDoublePushUnpush() throws Exception { |
| FastRemovalDequeue<Object> q = new FastRemovalDequeue<>(2); |
| |
| Object o1 = new Object(); |
| Object o2 = new Object(); |
| |
| q.push(o1); |
| q.push(o2); |
| |
| assertEquals(o2, q.first.getContent()); |
| assertEquals(o1, q.last.getContent()); |
| |
| Object r2 = q.unpush(); |
| |
| assertEquals(o2, r2); |
| assertEquals(o1, q.first.getContent()); |
| assertEquals(o1, q.last.getContent()); |
| |
| |
| Object r1 = q.unpush(); |
| assertEquals(o1, r1); |
| assertNull(q.first); |
| assertNull(q.last); |
| } |
| |
| |
| @Test |
| public void testSinglePushRemove() throws Exception { |
| FastRemovalDequeue<Object> q = new FastRemovalDequeue<>(2); |
| |
| Object o1 = new Object(); |
| |
| FastRemovalDequeue<Object>.Entry e1 = q.push(o1); |
| |
| assertEquals(o1, e1.getContent()); |
| |
| q.remove(e1); |
| |
| assertNull(q.first); |
| assertNull(q.last); |
| } |
| |
| |
| @Test |
| public void testDoublePushRemove() throws Exception { |
| FastRemovalDequeue<Object> q = new FastRemovalDequeue<>(2); |
| |
| Object o1 = new Object(); |
| Object o2 = new Object(); |
| |
| FastRemovalDequeue<Object>.Entry e1 = q.push(o1); |
| FastRemovalDequeue<Object>.Entry e2 = q.push(o2); |
| |
| assertEquals(o1, e1.getContent()); |
| assertEquals(o2, e2.getContent()); |
| |
| assertEquals(o2, q.first.getContent()); |
| assertEquals(o1, q.last.getContent()); |
| |
| q.remove(e1); |
| |
| assertEquals(o2, q.first.getContent()); |
| assertEquals(o2, q.last.getContent()); |
| |
| q.remove(e2); |
| |
| assertNull(q.first); |
| assertNull(q.last); |
| } |
| } |