80 lines
2.8 KiB
Java
80 lines
2.8 KiB
Java
/*
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* Copyright (c) 2010, 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 6720170
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* @summary check for ByteArrayInputStream.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(InputStream in, int curpos, long total,
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long toskip, long expected)
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throws Exception
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{
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System.err.println("\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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// position to curpos; EOF if negative
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in.reset();
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int avail = curpos >= 0 ? curpos : in.available();
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long n = in.skip(avail);
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if (n != avail) {
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throw new RuntimeException("Unexpected number of bytes skipped = " + n);
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}
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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 != expected) {
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throw new RuntimeException("Unexpected number of bytes skipped = " + skipped);
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}
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}
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public static void main(String argv[]) throws Exception {
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int total = 1024;
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ByteArrayInputStream in = new ByteArrayInputStream(new byte[total]);
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/* test for skip */
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dotest(in, 0, total, 23, 23);
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dotest(in, 10, total, 23, 23);
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/* test for negative skip */
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dotest(in, 0, total, -23, 0);
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/* check for skip after EOF */
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dotest(in, -1, total, 20, 0);
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/* check for skip beyond EOF starting from before EOF */
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dotest(in, 0, total, total+20, total);
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/* check for skip if the pos + toskip causes integer overflow */
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dotest(in, 10, total, Long.MAX_VALUE, total-10);
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}
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}
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