| /* |
| * Copyright (c) 2016, 2017, 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 |
| * @library /test/lib |
| * @build jdk.test.lib.RandomFactory |
| * @run main TestAvailable |
| * @bug 7031075 8161426 |
| * @summary Make sure that available() method behaves as expected. |
| * @key randomness |
| */ |
| |
| import java.io.*; |
| import java.util.Random; |
| import java.util.zip.*; |
| import jdk.test.lib.RandomFactory; |
| |
| public class TestAvailable { |
| |
| public static void main(String args[]) throws Throwable { |
| Random r = RandomFactory.getRandom(); |
| for (int n = 0; n < 10; n++) { |
| byte[] src = new byte[r.nextInt(100) + 1]; |
| r.nextBytes(src); |
| // test InflaterInputStream |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| try (DeflaterOutputStream dos = new DeflaterOutputStream(baos)) { |
| dos.write(src); |
| } |
| try (InflaterInputStream iis = new InflaterInputStream( |
| new ByteArrayInputStream(baos.toByteArray()))) { |
| test(iis, src); |
| } |
| |
| // test GZIPInputStream |
| baos = new ByteArrayOutputStream(); |
| try (GZIPOutputStream dos = new GZIPOutputStream(baos)) { |
| dos.write(src); |
| } |
| try (GZIPInputStream gis = new GZIPInputStream( |
| new ByteArrayInputStream(baos.toByteArray()))) { |
| test(gis, src); |
| } |
| } |
| } |
| |
| private static void test(InputStream is, byte[] expected) throws IOException { |
| int cnt = 0; |
| do { |
| int available = is.available(); |
| if (available > 0) { |
| int b = is.read(); |
| if (b == -1) { |
| throw new RuntimeException("available() > 0, read() == -1 : failed!"); |
| } |
| if (expected[cnt++] != (byte)b) { |
| throw new RuntimeException("read() : failed!"); |
| } |
| } else if (available == 0) { |
| if (is.read() != -1) { |
| throw new RuntimeException("available() == 0, read() != -1 : failed!"); |
| } |
| break; |
| } else { |
| throw new RuntimeException("available() < 0 : failed!"); |
| } |
| } while (true); |
| if (cnt != expected.length) { |
| throw new RuntimeException("read : failed!"); |
| } |
| } |
| |
| } |