114 lines
4.3 KiB
Java
114 lines
4.3 KiB
Java
/*
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* Copyright (c) 2021, 2024, 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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* @library /test/lib
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* @build jdk.test.lib.RandomFactory
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* @run main ReadXBytes
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* @bug 8264777
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* @summary Test read{All,N}Bytes overrides (use -Dseed=X to set PRNG seed)
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* @key randomness
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*/
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.io.RandomAccessFile;
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import java.util.Arrays;
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import java.util.Random;
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import jdk.test.lib.RandomFactory;
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public class ReadXBytes {
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private static final int ITERATIONS = 10;
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private static final int MAX_FILE_SIZE = 1_000_000;
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private static final Random RND = RandomFactory.getRandom();
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public static void main(String args[]) throws IOException {
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File dir = new File(".");
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dir.deleteOnExit();
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File empty = File.createTempFile("foo", "bar", dir);
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empty.deleteOnExit();
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try (FileInputStream fis = new FileInputStream(empty)) {
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try {
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fis.readNBytes(-1);
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throw new RuntimeException("IllegalArgumentException expected");
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} catch (IllegalArgumentException expected) {
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}
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byte[] nbytes = fis.readNBytes(0);
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if (nbytes.length != 0)
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throw new RuntimeException("readNBytes() zero length for empty");
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byte[] b = fis.readNBytes(1);
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if (b.length != 0)
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throw new RuntimeException("readNBytes: zero-length byte[] expected");
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b = fis.readAllBytes();
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if (b.length != 0)
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throw new RuntimeException("readAllBytes: zero-length byte[] expected");
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}
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for (int i = 0; i < ITERATIONS; i++) {
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File file = File.createTempFile("foo", "bar", dir);
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file.deleteOnExit();
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int size = 1 + RND.nextInt(MAX_FILE_SIZE);
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System.out.printf("size %d%n", size);
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byte[] bytes = new byte[size];
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RND.nextBytes(bytes);
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try (RandomAccessFile raf = new RandomAccessFile(file, "rw")) {
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raf.write(bytes);
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}
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try (FileInputStream fis = new FileInputStream(file)) {
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int pos = RND.nextInt(size);
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int len = RND.nextInt(size - pos);
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fis.getChannel().position(pos);
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byte[] nbytes = fis.readNBytes(0);
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if (nbytes.length != 0)
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throw new RuntimeException("readNBytes() zero length");
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nbytes = fis.readNBytes(len);
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if (nbytes.length != len)
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throw new RuntimeException("readNBytes() length");
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if (!Arrays.equals(nbytes, 0, len, bytes, pos, pos + len))
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throw new RuntimeException("readNBytes() content");
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}
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try (FileInputStream fis = new FileInputStream(file)) {
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int pos = RND.nextInt(size);
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fis.getChannel().position(pos);
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byte[] allbytes = fis.readAllBytes();
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if (allbytes.length != size - pos)
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throw new RuntimeException("readAllBytes() length");
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if (!Arrays.equals(allbytes, 0, allbytes.length,
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bytes, pos, pos + allbytes.length))
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throw new RuntimeException("readAllBytes() content");
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}
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file.delete();
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}
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dir.delete();
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}
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}
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