| /* |
| * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * @test |
| * @bug 8014854 |
| * @summary Exercises CharBuffer#chars on each of the CharBuffer types |
| * @run testng Chars |
| */ |
| |
| import java.nio.ByteBuffer; |
| import java.nio.ByteOrder; |
| import java.nio.CharBuffer; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Random; |
| |
| import org.testng.annotations.DataProvider; |
| import org.testng.annotations.Test; |
| |
| import static org.testng.Assert.assertEquals; |
| |
| public class Chars { |
| |
| static final Random RAND = new Random(); |
| |
| static final int SIZE = 128 + RAND.nextInt(1024); |
| |
| /** |
| * Randomize the char buffer's position and limit. |
| */ |
| static CharBuffer randomizeRange(CharBuffer cb) { |
| int mid = cb.capacity() >>> 1; |
| int start = RAND.nextInt(mid); |
| int end = mid + RAND.nextInt(mid); |
| cb.position(start); |
| cb.limit(end); |
| return cb; |
| } |
| |
| /** |
| * Randomize the char buffer's contents, position and limit. |
| */ |
| static CharBuffer randomize(CharBuffer cb) { |
| while (cb.hasRemaining()) { |
| cb.put((char)RAND.nextInt()); |
| } |
| return randomizeRange(cb); |
| } |
| |
| /** |
| * Sums the remaining chars in the char buffer. |
| */ |
| static int intSum(CharBuffer cb) { |
| int sum = 0; |
| cb.mark(); |
| while (cb.hasRemaining()) { |
| sum += cb.get(); |
| } |
| cb.reset(); |
| return sum; |
| } |
| |
| /** |
| * Creates char buffers to test, adding them to the given list. |
| */ |
| static void addCases(CharBuffer cb, List<CharBuffer> buffers) { |
| randomize(cb); |
| buffers.add(cb); |
| |
| buffers.add(cb.slice()); |
| buffers.add(cb.duplicate()); |
| buffers.add(cb.asReadOnlyBuffer()); |
| |
| buffers.add(randomizeRange(cb.slice())); |
| buffers.add(randomizeRange(cb.duplicate())); |
| buffers.add(randomizeRange(cb.asReadOnlyBuffer())); |
| } |
| |
| @DataProvider(name = "charbuffers") |
| public Object[][] createCharBuffers() { |
| List<CharBuffer> buffers = new ArrayList<>(); |
| |
| // heap |
| addCases(CharBuffer.allocate(SIZE), buffers); |
| addCases(CharBuffer.wrap(new char[SIZE]), buffers); |
| addCases(ByteBuffer.allocate(SIZE*2).order(ByteOrder.BIG_ENDIAN).asCharBuffer(), |
| buffers); |
| addCases(ByteBuffer.allocate(SIZE*2).order(ByteOrder.LITTLE_ENDIAN).asCharBuffer(), |
| buffers); |
| |
| // direct |
| addCases(ByteBuffer.allocateDirect(SIZE*2).order(ByteOrder.BIG_ENDIAN).asCharBuffer(), |
| buffers); |
| addCases(ByteBuffer.allocateDirect(SIZE*2).order(ByteOrder.LITTLE_ENDIAN).asCharBuffer(), |
| buffers); |
| |
| // read-only buffer backed by a CharSequence |
| buffers.add(CharBuffer.wrap(randomize(CharBuffer.allocate(SIZE)))); |
| |
| Object[][] params = new Object[buffers.size()][]; |
| for (int i = 0; i < buffers.size(); i++) { |
| CharBuffer cb = buffers.get(i); |
| params[i] = new Object[] { cb.getClass().getName(), cb }; |
| } |
| |
| return params; |
| } |
| |
| @Test(dataProvider = "charbuffers") |
| public void testChars(String type, CharBuffer cb) { |
| System.out.format("%s position=%d, limit=%d%n", type, cb.position(), cb.limit()); |
| int expected = intSum(cb); |
| assertEquals(cb.chars().sum(), expected); |
| assertEquals(cb.chars().parallel().sum(), expected); |
| } |
| } |