100 lines
3.2 KiB
Java
100 lines
3.2 KiB
Java
/*
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* Copyright (c) 2023, 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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* @summary Basic tests of immutable BitSets
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* @modules java.base/jdk.internal.util
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* @run junit ImmutableBitSet
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*/
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import jdk.internal.util.ImmutableBitSetPredicate;
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import org.junit.jupiter.api.Test;
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import java.util.BitSet;
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import java.util.Random;
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import java.util.function.IntPredicate;
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import java.util.stream.IntStream;
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import static org.junit.jupiter.api.Assertions.*;
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public class ImmutableBitSet {
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@Test
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void empty() {
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BitSet bs = new BitSet();
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IntPredicate ibs = ImmutableBitSetPredicate.of(bs);
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test(bs, ibs);
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}
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@Test
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void negativeIndex() {
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IntStream.of(0, 127, 128, 129, 143, 4711).forEach(k -> {
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BitSet bs = new BitSet(k);
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IntPredicate ibs = ImmutableBitSetPredicate.of(bs);
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assertFalse(ibs.test(-1));
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assertFalse(ibs.test(Integer.MIN_VALUE));
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});
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}
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@Test
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void basic() {
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IntStream.of(0, 16, 127, 128, 129, 143, 4711).forEach(k -> basic(k));
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}
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void basic(int length) {
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BitSet bs = createReference(length);
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IntPredicate ibs = ImmutableBitSetPredicate.of(bs);
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test(bs, ibs);
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}
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@Test
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void clearedAtTheTail() {
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IntStream.of(0, 16, 127, 128, 129, 143, 4711).forEach(k -> {
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for (int i = Long.BYTES - 1; i < Long.BYTES + 2; i++) {
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BitSet bs = createReference(k + i);
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for (int j = bs.length() - 1; j > Long.BYTES - 1; j--) {
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bs.clear(j);
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}
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IntPredicate ibs = ImmutableBitSetPredicate.of(bs);
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test(bs, ibs);
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}
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});
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}
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static void test(BitSet expected, IntPredicate actual) {
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for (int i = 0; i < expected.length() + 17; i++) {
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assertEquals(expected.get(i), actual.test(i), "at index " + i);
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}
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}
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private static BitSet createReference(int length) {
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BitSet result = new BitSet(length);
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Random random = new Random(length);
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for (int i = 0; i < length; i++) {
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result.set(i, random.nextBoolean());
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}
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return result;
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}
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} |