125 lines
4.4 KiB
Java
125 lines
4.4 KiB
Java
/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* This file is available under and governed by the GNU General Public
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* License version 2 only, as published by the Free Software Foundation.
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* However, the following notice accompanied the original version of this
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* file:
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*
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* Written by Doug Lea and Martin Buchholz with assistance from
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* members of JCP JSR-166 Expert Group and released to the public
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* domain, as explained at
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* http://creativecommons.org/publicdomain/zero/1.0/
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*/
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import java.util.ArrayDeque;
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import java.util.Collections;
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import java.util.Spliterator;
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import junit.framework.Test;
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public class ArrayDeque8Test extends JSR166TestCase {
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public static void main(String[] args) {
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main(suite(), args);
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}
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public static Test suite() {
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return newTestSuite(ArrayDeque8Test.class);
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}
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/**
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* Spliterator.getComparator always throws IllegalStateException
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*/
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public void testSpliterator_getComparator() {
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assertThrows(IllegalStateException.class,
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() -> new ArrayDeque().spliterator().getComparator());
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}
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/**
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* Spliterator characteristics are as advertised
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*/
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public void testSpliterator_characteristics() {
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ArrayDeque q = new ArrayDeque();
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Spliterator s = q.spliterator();
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int characteristics = s.characteristics();
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int required = Spliterator.NONNULL
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| Spliterator.ORDERED
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| Spliterator.SIZED
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| Spliterator.SUBSIZED;
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assertEquals(required, characteristics & required);
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assertTrue(s.hasCharacteristics(required));
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assertEquals(0, characteristics
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& (Spliterator.CONCURRENT
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| Spliterator.DISTINCT
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| Spliterator.IMMUTABLE
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| Spliterator.SORTED));
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}
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/**
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* Handle capacities near Integer.MAX_VALUE.
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* ant -Dvmoptions='-Xms28g -Xmx28g' -Djsr166.expensiveTests=true -Djsr166.tckTestClass=ArrayDeque8Test -Djsr166.methodFilter=testHugeCapacity tck
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*/
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public void testHugeCapacity() {
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if (! (testImplementationDetails
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&& expensiveTests
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&& Runtime.getRuntime().maxMemory() > 24L * (1 << 30)))
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return;
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final Integer e = 42;
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final int maxArraySize = Integer.MAX_VALUE - 8;
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assertThrows(OutOfMemoryError.class,
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() -> new ArrayDeque(Integer.MAX_VALUE));
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{
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ArrayDeque q = new ArrayDeque(maxArraySize - 1);
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assertEquals(0, q.size());
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assertTrue(q.isEmpty());
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q = null;
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}
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{
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ArrayDeque q = new ArrayDeque();
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assertTrue(q.addAll(Collections.nCopies(maxArraySize - 3, e)));
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assertEquals(e, q.peekFirst());
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assertEquals(e, q.peekLast());
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assertEquals(maxArraySize - 3, q.size());
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q.addFirst((Integer) 0);
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q.addLast((Integer) 1);
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assertEquals((Integer) 0, q.peekFirst());
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assertEquals((Integer) 1, q.peekLast());
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assertEquals(maxArraySize - 1, q.size());
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ArrayDeque qq = q;
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ArrayDeque smallish = new ArrayDeque(
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Collections.nCopies(Integer.MAX_VALUE - q.size() + 1, e));
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assertThrows(
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IllegalStateException.class,
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() -> qq.addAll(qq),
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() -> qq.addAll(smallish),
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() -> smallish.addAll(qq));
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}
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}
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}
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