/*
* Copyright (c) 1997, 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.
*
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*/
/* @test
@bug 4017196
@summary Test for correct implementation of PushbackInputStream.skip
*/
import java.io.*;
public class Skip {
private static void dotest(PushbackInputStream in, int expected)
throws Exception
{
int one, two, last, got;
in.unread(4);
in.unread(5);
in.unread(6);
in.skip(2);
if (in.read() != 4) {
throw new Exception("Failed the n < pushed back bytes case");
}
System.err.println("Passed the n < pushed back bytes case");
one = in.read();
two = in.read();
if (two == 7) {
in.unread(two);
two = 0;
}
in.skip(2);
last = in.read();
got = (one + two + last);
System.err.println("Expected " + expected + " got " + got);
if (expected != got) {
throw new Exception("Expected " + expected + " got " + got);
}
}
public static void main(String args[]) throws Exception {
byte[] data1 = {1, 7, 1, 0, 4};
byte[] data2 = {1, 1, 1, 1, 5};
byte[] data3 = {1, 7, 1, 3, 6};
PushbackInputStream in;
in = new PushbackInputStream(new ByteArrayInputStream(data1), 3);
dotest(in, 1);
in = new PushbackInputStream(new ByteArrayInputStream(data2), 3);
dotest(in, 7);
in = new PushbackInputStream(new ByteArrayInputStream(data3), 3);
dotest(in, 4);
}
}