1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
/*
* Copyright (c) 2023, 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
* @summary Basic tests of immutable BitSets
* @modules java.base/jdk.internal.util
* @run junit ImmutableBitSet
*/
import jdk.internal.util.ImmutableBitSetPredicate;
import org.junit.jupiter.api.Test;
import java.util.BitSet;
import java.util.Random;
import java.util.function.IntPredicate;
import java.util.stream.IntStream;
import static org.junit.jupiter.api.Assertions.*;
public class ImmutableBitSet {
@Test
void empty() {
BitSet bs = new BitSet();
IntPredicate ibs = ImmutableBitSetPredicate.of(bs);
test(bs, ibs);
}
@Test
void negativeIndex() {
IntStream.of(0, 127, 128, 129, 143, 4711).forEach(k -> {
BitSet bs = new BitSet(k);
IntPredicate ibs = ImmutableBitSetPredicate.of(bs);
assertFalse(ibs.test(-1));
assertFalse(ibs.test(Integer.MIN_VALUE));
});
}
@Test
void basic() {
IntStream.of(0, 16, 127, 128, 129, 143, 4711).forEach(k -> basic(k));
}
void basic(int length) {
BitSet bs = createReference(length);
IntPredicate ibs = ImmutableBitSetPredicate.of(bs);
test(bs, ibs);
}
@Test
void clearedAtTheTail() {
IntStream.of(0, 16, 127, 128, 129, 143, 4711).forEach(k -> {
for (int i = Long.BYTES - 1; i < Long.BYTES + 2; i++) {
BitSet bs = createReference(k + i);
for (int j = bs.length() - 1; j > Long.BYTES - 1; j--) {
bs.clear(j);
}
IntPredicate ibs = ImmutableBitSetPredicate.of(bs);
test(bs, ibs);
}
});
}
static void test(BitSet expected, IntPredicate actual) {
for (int i = 0; i < expected.length() + 17; i++) {
assertEquals(expected.get(i), actual.test(i), "at index " + i);
}
}
private static BitSet createReference(int length) {
BitSet result = new BitSet(length);
Random random = new Random(length);
for (int i = 0; i < length; i++) {
result.set(i, random.nextBoolean());
}
return result;
}
}
|
