russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
97 lines
3.7 KiB
Java
97 lines
3.7 KiB
Java
/*
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* Copyright (c) 2022, 2026, 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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/*
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* @test
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* @bug 5041655
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* @summary Verify FileLock.overlaps
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* @run junit Overlaps
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*/
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import java.io.IOException;
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import java.nio.ByteBuffer;
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import java.nio.channels.FileChannel;
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import java.nio.channels.FileLock;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.util.stream.Stream;
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import static java.lang.Boolean.*;
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import static java.nio.file.StandardOpenOption.*;
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import org.junit.jupiter.api.AfterAll;
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import org.junit.jupiter.api.BeforeAll;
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import org.junit.jupiter.params.ParameterizedTest;
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import org.junit.jupiter.params.provider.Arguments;
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import org.junit.jupiter.params.provider.MethodSource;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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public class Overlaps {
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private static final long POS = 27;
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private static final long SIZE = 42;
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private static FileChannel fc;
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@BeforeAll
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public static void before() throws IOException {
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Path path = Files.createTempFile(Path.of("."), "foo", ".bar");
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fc = FileChannel.open(path, CREATE, WRITE, DELETE_ON_CLOSE);
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fc.position(POS);
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fc.write(ByteBuffer.wrap(new byte[(int)SIZE]));
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}
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@AfterAll
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public static void after() throws IOException {
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fc.close();
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}
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public static Stream<Arguments> ranges() {
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return Stream.of(
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Arguments.of(POS, SIZE, -1, -1, FALSE),
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Arguments.of(POS, SIZE, 0, -1, FALSE),
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Arguments.of(POS, SIZE, POS - 1, -1, FALSE),
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Arguments.of(POS, SIZE, POS + SIZE/2, -1, FALSE),
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Arguments.of(POS, SIZE, POS + SIZE, -1, FALSE),
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Arguments.of(POS, SIZE, -1, POS, FALSE),
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Arguments.of(POS, SIZE, -1, POS + SIZE/2, TRUE),
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Arguments.of(POS, SIZE, POS - 2, 1, FALSE),
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Arguments.of(POS, SIZE, POS + 1, 1, TRUE),
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Arguments.of(POS, SIZE, POS + SIZE/2, 0, TRUE),
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Arguments.of(POS, SIZE, Long.MAX_VALUE, 2, FALSE),
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Arguments.of(POS, SIZE, POS + SIZE / 2, Long.MAX_VALUE, TRUE),
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Arguments.of(POS, SIZE, 0, 0, TRUE),
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Arguments.of(Long.MAX_VALUE - SIZE/2, 0, 0, SIZE, FALSE),
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Arguments.of(Long.MAX_VALUE - SIZE/2, 0, Long.MAX_VALUE - SIZE/4, SIZE, TRUE),
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Arguments.of(Long.MAX_VALUE - SIZE/2, 0, Long.MAX_VALUE - SIZE, 0, TRUE),
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Arguments.of(Long.MAX_VALUE - SIZE, 0, Long.MAX_VALUE - SIZE/2, 0, TRUE));
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}
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@ParameterizedTest
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@MethodSource("ranges")
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public void overlaps(long lockPos, long lockSize, long pos, long size,
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boolean overlaps) throws IOException {
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try (FileLock lock = fc.lock(lockPos, lockSize, false)) {
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assertEquals(overlaps, lock.overlaps(pos, size));
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}
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}
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}
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