157 lines
6.1 KiB
Java
157 lines
6.1 KiB
Java
/*
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* Copyright (c) 2007, 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 5037068
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* @summary Test import/export constructors and methods
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* @author Martin Buchholz
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* @key randomness
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*/
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import java.nio.*;
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import java.util.*;
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public class ImportExport {
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final Random rnd = new Random();
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void equal(byte[] x, byte[] y) {
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check(Arrays.equals(x, y));
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}
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void equal(long[] x, long[] y) {
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check(Arrays.equals(x, y));
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}
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void equal(byte[] bytes, BitSet s) {
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equal(s, BitSet.valueOf(bytes));
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equal(s, BitSet.valueOf(ByteBuffer.wrap(bytes)));
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equal(s, BitSet.valueOf(
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ByteBuffer.wrap(
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Arrays.copyOf(bytes, bytes.length + 8 + rnd.nextInt(8)))
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.order(ByteOrder.LITTLE_ENDIAN)
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.asLongBuffer()));
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}
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void checkEmptyBitSet(BitSet s) {
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equal(s.toByteArray(), new byte[0]);
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equal(s.toLongArray(), new long[0]);
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check(s.isEmpty());
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}
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void test(String[] args) throws Throwable {
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for (int i = 0; i < 17; i++) {
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byte[] bytes = new byte[i];
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BitSet s = new BitSet();
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equal(bytes, s);
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equal(BitSet.valueOf(bytes).toByteArray(), new byte[0]);
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if (i > 0) {
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int k = rnd.nextInt(i);
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for (int j = 0; j < 8; j++) {
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bytes[k] |= 1 << j;
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s.set(8*k+j);
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equal(bytes, s);
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byte[] expected = new byte[k+1]; expected[k] = bytes[k];
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equal(BitSet.valueOf(bytes).toByteArray(), expected);
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ByteBuffer bb = ByteBuffer.wrap(bytes);
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bb.position(k);
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equal(BitSet.valueOf(bb).toByteArray(),
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new byte[]{bytes[k]});
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}
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}
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}
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for (int i = 0; i < 100; i++) {
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byte[] bytes = new byte[rnd.nextInt(17)];
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for (int j = 0; j < bytes.length; j++)
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bytes[j] = (byte) rnd.nextInt(0x100);
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BitSet s = BitSet.valueOf(bytes);
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byte[] expected = s.toByteArray();
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equal(expected.length, (s.length()+7)/8);
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if (bytes.length == 0)
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continue;
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if (expected.length > 0)
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check(expected[expected.length-1] != 0);
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if (bytes[bytes.length-1] != 0)
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equal(bytes, expected);
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int n = rnd.nextInt(8 * bytes.length);
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equal(s.get(n), ((bytes[n/8] & (1<<(n%8))) != 0));
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}
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for (int i = 0; i < 3; i++) {
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checkEmptyBitSet(BitSet.valueOf(new byte[i]));
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checkEmptyBitSet(BitSet.valueOf(ByteBuffer.wrap(new byte[i])));
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checkEmptyBitSet(BitSet.valueOf(new byte[i*64]));
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checkEmptyBitSet(BitSet.valueOf(ByteBuffer.wrap(new byte[i*64])));
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checkEmptyBitSet(BitSet.valueOf(new long[i]));
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checkEmptyBitSet(BitSet.valueOf(LongBuffer.wrap(new long[i])));
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}
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{
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long[] longs = new long[rnd.nextInt(10)];
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for (int i = 0; i < longs.length; i++)
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longs[i] = rnd.nextLong();
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LongBuffer b1 = LongBuffer.wrap(longs);
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LongBuffer b2 = LongBuffer.allocate(longs.length + 10);
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for (int i = 0; i < b2.limit(); i++)
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b2.put(i, rnd.nextLong());
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int beg = rnd.nextInt(10);
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b2.position(beg);
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b2.put(longs);
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b2.limit(b2.position());
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b2.position(beg);
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BitSet s1 = BitSet.valueOf(longs);
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BitSet s2 = BitSet.valueOf(b1);
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BitSet s3 = BitSet.valueOf(b2);
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equal(s1, s2);
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equal(s1, s3);
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if (longs.length > 0 && longs[longs.length -1] != 0) {
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equal(longs, s1.toLongArray());
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equal(longs, s2.toLongArray());
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equal(longs, s3.toLongArray());
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}
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for (int i = 0; i < 64 * longs.length; i++) {
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equal(s1.get(i), ((longs [i/64] & (1L<<(i%64))) != 0));
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equal(s2.get(i), ((b1.get(i/64) & (1L<<(i%64))) != 0));
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equal(s3.get(i), ((b2.get(b2.position()+i/64) & (1L<<(i%64))) != 0));
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}
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}
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}
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//--------------------- Infrastructure ---------------------------
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volatile int passed = 0, failed = 0;
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void pass() {passed++;}
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void fail() {failed++; Thread.dumpStack();}
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void fail(String msg) {System.err.println(msg); fail();}
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void unexpected(Throwable t) {failed++; t.printStackTrace();}
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void check(boolean cond) {if (cond) pass(); else fail();}
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void equal(Object x, Object y) {
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if (x == null ? y == null : x.equals(y)) pass();
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else fail(x + " not equal to " + y);}
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public static void main(String[] args) throws Throwable {
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new ImportExport().instanceMain(args);}
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void instanceMain(String[] args) throws Throwable {
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try {test(args);} catch (Throwable t) {unexpected(t);}
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System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
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if (failed > 0) throw new AssertionError("Some tests failed");}
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}
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