/*
* 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 org.junit.Assert;
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();
Assert.assertEquals(o1, r);
Assert.assertNull(q.first);
Assert.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);
Assert.assertEquals(o2, q.first.getContent());
Assert.assertEquals(o1, q.last.getContent());
Object r1 = q.pop();
Assert.assertEquals(o1, r1);
Assert.assertEquals(o2, q.first.getContent());
Assert.assertEquals(o2, q.last.getContent());
Object r2 = q.pop();
Assert.assertEquals(o2, r2);
Assert.assertNull(q.first);
Assert.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();
Assert.assertEquals(o1, r);
Assert.assertNull(q.first);
Assert.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);
Assert.assertEquals(o1, q.first.getContent());
Assert.assertEquals(o2, q.last.getContent());
Object r2 = q.pop();
Assert.assertEquals(o2, r2);
Assert.assertEquals(o1, q.first.getContent());
Assert.assertEquals(o1, q.last.getContent());
Object r1 = q.pop();
Assert.assertEquals(o1, r1);
Assert.assertNull(q.first);
Assert.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();
Assert.assertEquals(o1, r);
Assert.assertNull(q.first);
Assert.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);
Assert.assertEquals(o2, q.first.getContent());
Assert.assertEquals(o1, q.last.getContent());
Object r2 = q.unpush();
Assert.assertEquals(o2, r2);
Assert.assertEquals(o1, q.first.getContent());
Assert.assertEquals(o1, q.last.getContent());
Object r1 = q.unpush();
Assert.assertEquals(o1, r1);
Assert.assertNull(q.first);
Assert.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);
Assert.assertEquals(o1, e1.getContent());
q.remove(e1);
Assert.assertNull(q.first);
Assert.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);
Assert.assertEquals(o1, e1.getContent());
Assert.assertEquals(o2, e2.getContent());
Assert.assertEquals(o2, q.first.getContent());
Assert.assertEquals(o1, q.last.getContent());
q.remove(e1);
Assert.assertEquals(o2, q.first.getContent());
Assert.assertEquals(o2, q.last.getContent());
q.remove(e2);
Assert.assertNull(q.first);
Assert.assertNull(q.last);
}
}