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