/*
* Copyright ( c ) 2002 , 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 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" );
}
}
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