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