| /* |
| * Copyright (c) 2014, 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. |
| */ |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.lang.reflect.Constructor; |
| import java.lang.reflect.Method; |
| |
| /* |
| * @test |
| * @bug 8067870 |
| * @modules java.base/java.io:open |
| * @summary verifies java.io.ObjectInputStream.PeekInputStream.skip works |
| * as intended |
| */ |
| public class PeekInputStreamTest { |
| |
| public static void main(String[] args) throws ReflectiveOperationException, |
| IOException { |
| |
| InputStream pin = createPeekInputStream( |
| new ByteArrayInputStream(new byte[]{1, 2, 3, 4})); |
| peek(pin); |
| if (pin.skip(1) != 1 || pin.read() != 2) |
| throw new AssertionError(); |
| |
| InputStream pin1 = createPeekInputStream( |
| new ByteArrayInputStream(new byte[]{1, 2, 3, 4})); |
| if (pin1.skip(1) != 1 || pin1.read() != 2) |
| throw new AssertionError(); |
| |
| InputStream pin2 = createPeekInputStream( |
| new ByteArrayInputStream(new byte[]{1, 2, 3, 4})); |
| if (pin2.skip(0) != 0 || pin2.read() != 1) |
| throw new AssertionError(); |
| |
| InputStream pin3 = createPeekInputStream( |
| new ByteArrayInputStream(new byte[]{1, 2, 3, 4})); |
| if (pin3.skip(2) != 2 || pin3.read() != 3) |
| throw new AssertionError(); |
| |
| InputStream pin4 = createPeekInputStream( |
| new ByteArrayInputStream(new byte[]{1, 2, 3, 4})); |
| if (pin4.skip(3) != 3 || pin4.read() != 4) |
| throw new AssertionError(); |
| |
| InputStream pin5 = createPeekInputStream( |
| new ByteArrayInputStream(new byte[]{1, 2, 3, 4})); |
| if (pin5.skip(16) != 4 || pin5.read() != -1) |
| throw new AssertionError(); |
| } |
| |
| private static InputStream createPeekInputStream(InputStream underlying) |
| throws ReflectiveOperationException { |
| Class<? extends InputStream> clazz = |
| Class.forName("java.io.ObjectInputStream$PeekInputStream") |
| .asSubclass(InputStream.class); |
| |
| Constructor<? extends InputStream> ctr = |
| clazz.getDeclaredConstructor(InputStream.class); |
| ctr.setAccessible(true); |
| return ctr.newInstance(underlying); |
| } |
| |
| private static void peek(InputStream pin) |
| throws ReflectiveOperationException { |
| Method p = pin.getClass().getDeclaredMethod("peek"); |
| p.setAccessible(true); |
| p.invoke(pin); |
| } |
| } |