1 /* 2 * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 4926314 27 * @summary Test for InputStreamReader#read(CharBuffer). 28 * @run testng ReadCharBuffer 29 */ 30 31 package test.java.io.InputStreamReader; 32 33 import org.testng.annotations.DataProvider; 34 import org.testng.annotations.Test; 35 36 37 import java.io.ByteArrayInputStream; 38 import java.io.IOException; 39 import java.io.InputStreamReader; 40 import java.io.Reader; 41 import java.nio.ByteBuffer; 42 import java.nio.CharBuffer; 43 import java.util.Arrays; 44 45 import static java.nio.charset.StandardCharsets.US_ASCII; 46 import static org.testng.Assert.assertEquals; 47 48 public class ReadCharBuffer { 49 50 private static final int BUFFER_SIZE = 24; 51 52 @DataProvider(name = "buffers") createBuffers()53 public Object[][] createBuffers() { 54 // test both on-heap and off-heap buffers as they make use different code paths 55 return new Object[][]{ 56 new Object[]{CharBuffer.allocate(BUFFER_SIZE)}, 57 new Object[]{ByteBuffer.allocateDirect(BUFFER_SIZE * 2).asCharBuffer()} 58 }; 59 } 60 61 @Test(dataProvider = "buffers") read(CharBuffer buffer)62 public void read(CharBuffer buffer) throws IOException { 63 fillBuffer(buffer); 64 65 try (Reader reader = new InputStreamReader(new ByteArrayInputStream("ABCDEFGHIJKLMNOPQRTUVWXYZ".getBytes(US_ASCII)), US_ASCII)) { 66 buffer.limit(7); 67 buffer.position(1); 68 assertEquals(reader.read(buffer), 6); 69 assertEquals(buffer.position(), 7); 70 assertEquals(buffer.limit(), 7); 71 72 buffer.limit(16); 73 buffer.position(8); 74 assertEquals(reader.read(buffer), 8); 75 assertEquals(buffer.position(), 16); 76 assertEquals(buffer.limit(), 16); 77 } 78 79 buffer.clear(); 80 assertEquals(buffer.toString(), "xABCDEFxGHIJKLMNxxxxxxxx"); 81 } 82 fillBuffer(CharBuffer buffer)83 private void fillBuffer(CharBuffer buffer) { 84 char[] filler = new char[BUFFER_SIZE]; 85 Arrays.fill(filler, 'x'); 86 buffer.put(filler); 87 buffer.clear(); 88 } 89 90 } 91