/*
* Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* 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 4398210
* @summary check skip method after pushing data back
*
*/
import java.io.*;
public class Skip {
public static void main(String args[]) throws Exception {
test1();
}
private static void test1() throws Exception {
char[] buf = new char[20];
for (int i=0; i<20; i++)
buf[i] = (char)i;
CharArrayReader car = new CharArrayReader(buf);
PushbackReader pr = new PushbackReader(car, 10);
check(pr.read(), 0);
// Check skip without unread chars present
pr.skip(1);
check(pr.read(), 2);
pr.unread(2);
pr.unread(1);
// Check skip over and beyond unread chars
pr.skip(4);
check(pr.read(), 5);
check(pr.read(), 6);
pr.unread(6);
pr.unread(5);
// Check skip within unread chars
pr.skip(1);
check(pr.read(), 6);
check(pr.read(), 7);
// Check skip after unread chars have been used
pr.skip(3);
check(pr.read(), 11);
}
private static void check (int i, int j) {
if (i != j)
throw new RuntimeException("Test failed");
}
}