103 lines
3.0 KiB
Java
103 lines
3.0 KiB
Java
/*
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* Copyright (c) 1997, 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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/* @test
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@bug 4085939
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@summary Check for the correct behaviour of LineNumberInputStream.skip
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*/
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import java.io.*;
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public class Skip{
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private static void dotest(LineNumberInputStream in , int curpos ,
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long total , long toskip , long expected)
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throws Exception
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{
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try {
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System.err.println("\n\nCurrently at pos = " + curpos +
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"\nTotal bytes in the Stream = " + total +
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"\nNumber of bytes to skip = " + toskip +
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"\nNumber of bytes that should be skipped = " +
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expected);
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long skipped = in.skip(toskip);
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System.err.println("actual number skipped: "+ skipped);
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if ((skipped < 0) || (skipped > expected)) {
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throw new RuntimeException("Unexpected number of bytes skipped");
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}
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} catch (IOException e) {
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System.err.println("IOException is thrown - possible result");
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} catch (Throwable e) {
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throw new RuntimeException("Unexpected "+e+" is thrown!");
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}
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}
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public static void main( String argv[] ) throws Exception {
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LineNumberInputStream in = new LineNumberInputStream(new MyInputStream(11));
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/* test for negative skip */
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dotest(in, 0, 11, -23, 0);
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/* check for skip beyond EOF starting from before EOF */
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dotest(in, 0, 11, 20, 11);
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/* check for skip after EOF */
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dotest(in, -1, 11, 20, 0);
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}
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}
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class MyInputStream extends InputStream {
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private int readctr = 0;
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private long endoffile;
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public MyInputStream(long endoffile) {
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this.endoffile = endoffile;
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}
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public int read() {
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if (readctr == endoffile) {
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return -1;
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}
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else {
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readctr++;
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return 0;
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}
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}
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public int available() { return 0; }
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}
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