88 lines
2.7 KiB
Java
88 lines
2.7 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 4085938
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@summary Check for the correct behaviour of DataInputStream.skipBytes
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*/
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import java.io.*;
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public class SkipBytes{
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private static void dotest(DataInputStream dis, int pos, int total,
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int toskip, int expected) {
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try {
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System.err.println("\n\nTotal bytes in the stream = " + total);
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System.err.println("Currently at position = " + pos);
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System.err.println("Bytes to skip = " + toskip);
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System.err.println("Expected result = " + expected);
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int skipped = dis.skipBytes(toskip);
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System.err.println("Actual skipped = " + skipped);
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if (skipped != expected) {
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throw new RuntimeException
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("DataInputStream.skipBytes does not return expected value");
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}
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} catch(EOFException e){
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throw new RuntimeException
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("DataInputStream.skipBytes throws unexpected EOFException");
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} catch (IOException e) {
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System.err.println("IOException is thrown - possible result");
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}
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}
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public static void main(String args[]) throws Exception {
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DataInputStream dis = new DataInputStream(new MyInputStream());
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dotest(dis, 0, 11, -1, 0);
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dotest(dis, 0, 11, 5, 5);
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System.err.println("\n***CAUTION**** - may go into an infinite loop");
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dotest(dis, 5, 11, 20, 6);
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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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public int read() {
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if (readctr > 10){
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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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