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/*
* Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 5037068
* @summary Test import/export constructors and methods
* @author Martin Buchholz
* @key randomness
*/
import java.nio.*;
import java.util.*;
public class ImportExport {
final Random rnd = new Random();
void equal(byte[] x, byte[] y) {
check(Arrays.equals(x, y));
}
void equal(long[] x, long[] y) {
check(Arrays.equals(x, y));
}
void equal(byte[] bytes, BitSet s) {
equal(s, BitSet.valueOf(bytes));
equal(s, BitSet.valueOf(ByteBuffer.wrap(bytes)));
equal(s, BitSet.valueOf(
ByteBuffer.wrap(
Arrays.copyOf(bytes, bytes.length + 8 + rnd.nextInt(8)))
.order(ByteOrder.LITTLE_ENDIAN)
.asLongBuffer()));
}
void checkEmptyBitSet(BitSet s) {
equal(s.toByteArray(), new byte[0]);
equal(s.toLongArray(), new long[0]);
check(s.isEmpty());
}
void test(String[] args) throws Throwable {
for (int i = 0; i < 17; i++) {
byte[] bytes = new byte[i];
BitSet s = new BitSet();
equal(bytes, s);
equal(BitSet.valueOf(bytes).toByteArray(), new byte[0]);
if (i > 0) {
int k = rnd.nextInt(i);
for (int j = 0; j < 8; j++) {
bytes[k] |= 1 << j;
s.set(8*k+j);
equal(bytes, s);
byte[] expected = new byte[k+1]; expected[k] = bytes[k];
equal(BitSet.valueOf(bytes).toByteArray(), expected);
ByteBuffer bb = ByteBuffer.wrap(bytes);
bb.position(k);
equal(BitSet.valueOf(bb).toByteArray(),
new byte[]{bytes[k]});
}
}
}
for (int i = 0; i < 100; i++) {
byte[] bytes = new byte[rnd.nextInt(17)];
for (int j = 0; j < bytes.length; j++)
bytes[j] = (byte) rnd.nextInt(0x100);
BitSet s = BitSet.valueOf(bytes);
byte[] expected = s.toByteArray();
equal(expected.length, (s.length()+7)/8);
if (bytes.length == 0)
continue;
if (expected.length > 0)
check(expected[expected.length-1] != 0);
if (bytes[bytes.length-1] != 0)
equal(bytes, expected);
int n = rnd.nextInt(8 * bytes.length);
equal(s.get(n), ((bytes[n/8] & (1<<(n%8))) != 0));
}
for (int i = 0; i < 3; i++) {
checkEmptyBitSet(BitSet.valueOf(new byte[i]));
checkEmptyBitSet(BitSet.valueOf(ByteBuffer.wrap(new byte[i])));
checkEmptyBitSet(BitSet.valueOf(new byte[i*64]));
checkEmptyBitSet(BitSet.valueOf(ByteBuffer.wrap(new byte[i*64])));
checkEmptyBitSet(BitSet.valueOf(new long[i]));
checkEmptyBitSet(BitSet.valueOf(LongBuffer.wrap(new long[i])));
}
{
long[] longs = new long[rnd.nextInt(10)];
for (int i = 0; i < longs.length; i++)
longs[i] = rnd.nextLong();
LongBuffer b1 = LongBuffer.wrap(longs);
LongBuffer b2 = LongBuffer.allocate(longs.length + 10);
for (int i = 0; i < b2.limit(); i++)
b2.put(i, rnd.nextLong());
int beg = rnd.nextInt(10);
b2.position(beg);
b2.put(longs);
b2.limit(b2.position());
b2.position(beg);
BitSet s1 = BitSet.valueOf(longs);
BitSet s2 = BitSet.valueOf(b1);
BitSet s3 = BitSet.valueOf(b2);
equal(s1, s2);
equal(s1, s3);
if (longs.length > 0 && longs[longs.length -1] != 0) {
equal(longs, s1.toLongArray());
equal(longs, s2.toLongArray());
equal(longs, s3.toLongArray());
}
for (int i = 0; i < 64 * longs.length; i++) {
equal(s1.get(i), ((longs [i/64] & (1L<<(i%64))) != 0));
equal(s2.get(i), ((b1.get(i/64) & (1L<<(i%64))) != 0));
equal(s3.get(i), ((b2.get(b2.position()+i/64) & (1L<<(i%64))) != 0));
}
}
}
//--------------------- Infrastructure ---------------------------
volatile int passed = 0, failed = 0;
void pass() {passed++;}
void fail() {failed++; Thread.dumpStack();}
void fail(String msg) {System.err.println(msg); fail();}
void unexpected(Throwable t) {failed++; t.printStackTrace();}
void check(boolean cond) {if (cond) pass(); else fail();}
void equal(Object x, Object y) {
if (x == null ? y == null : x.equals(y)) pass();
else fail(x + " not equal to " + y);}
public static void main(String[] args) throws Throwable {
new ImportExport().instanceMain(args);}
void instanceMain(String[] args) throws Throwable {
try {test(args);} catch (Throwable t) {unexpected(t);}
System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
if (failed > 0) throw new AssertionError("Some tests failed");}
}
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