139 lines
4.4 KiB
Java
139 lines
4.4 KiB
Java
/*
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* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
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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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* @test
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* @bug 8014854
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* @summary Exercises CharBuffer#chars on each of the CharBuffer types
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* @run testng Chars
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* @key randomness
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*/
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import java.nio.ByteBuffer;
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import java.nio.ByteOrder;
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import java.nio.CharBuffer;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Random;
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import org.testng.annotations.DataProvider;
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import org.testng.annotations.Test;
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import static org.testng.Assert.assertEquals;
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public class Chars {
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static final Random RAND = new Random();
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static final int SIZE = 128 + RAND.nextInt(1024);
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/**
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* Randomize the char buffer's position and limit.
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*/
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static CharBuffer randomizeRange(CharBuffer cb) {
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int mid = cb.capacity() >>> 1;
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int start = RAND.nextInt(mid + 1); // from 0 to mid
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int end = mid + RAND.nextInt(cb.capacity() - mid + 1); // from mid to capacity
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cb.position(start);
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cb.limit(end);
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return cb;
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}
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/**
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* Randomize the char buffer's contents, position and limit.
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*/
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static CharBuffer randomize(CharBuffer cb) {
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while (cb.hasRemaining()) {
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cb.put((char)RAND.nextInt());
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}
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return randomizeRange(cb);
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}
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/**
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* Sums the remaining chars in the char buffer.
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*/
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static int intSum(CharBuffer cb) {
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int sum = 0;
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cb.mark();
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while (cb.hasRemaining()) {
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sum += cb.get();
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}
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cb.reset();
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return sum;
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}
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/**
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* Creates char buffers to test, adding them to the given list.
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*/
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static void addCases(CharBuffer cb, List<CharBuffer> buffers) {
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randomize(cb);
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buffers.add(cb);
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buffers.add(cb.slice());
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buffers.add(cb.duplicate());
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buffers.add(cb.asReadOnlyBuffer());
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buffers.add(randomizeRange(cb.slice()));
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buffers.add(randomizeRange(cb.duplicate()));
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buffers.add(randomizeRange(cb.asReadOnlyBuffer()));
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}
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@DataProvider(name = "charbuffers")
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public Object[][] createCharBuffers() {
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List<CharBuffer> buffers = new ArrayList<>();
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// heap
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addCases(CharBuffer.allocate(SIZE), buffers);
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addCases(CharBuffer.wrap(new char[SIZE]), buffers);
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addCases(ByteBuffer.allocate(SIZE*2).order(ByteOrder.BIG_ENDIAN).asCharBuffer(),
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buffers);
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addCases(ByteBuffer.allocate(SIZE*2).order(ByteOrder.LITTLE_ENDIAN).asCharBuffer(),
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buffers);
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// direct
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addCases(ByteBuffer.allocateDirect(SIZE*2).order(ByteOrder.BIG_ENDIAN).asCharBuffer(),
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buffers);
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addCases(ByteBuffer.allocateDirect(SIZE*2).order(ByteOrder.LITTLE_ENDIAN).asCharBuffer(),
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buffers);
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// read-only buffer backed by a CharSequence
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buffers.add(CharBuffer.wrap(randomize(CharBuffer.allocate(SIZE))));
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Object[][] params = new Object[buffers.size()][];
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for (int i = 0; i < buffers.size(); i++) {
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CharBuffer cb = buffers.get(i);
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params[i] = new Object[] { cb.getClass().getName(), cb };
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}
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return params;
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}
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@Test(dataProvider = "charbuffers")
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public void testChars(String type, CharBuffer cb) {
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System.out.format("%s position=%d, limit=%d%n", type, cb.position(), cb.limit());
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int expected = intSum(cb);
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assertEquals(cb.chars().sum(), expected);
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assertEquals(cb.chars().parallel().sum(), expected);
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}
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}
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