BitSet_test.cpp revision d98e07fdf9c338589f263c47ce5c844ed43efad5 
1/*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define LOG_TAG "BitSet_test"
18
19#include <utils/BitSet.h>
20#include <cutils/log.h>
21#include <gtest/gtest.h>
22#include <unistd.h>
23
24namespace android {
25
26class BitSetTest : public testing::Test {
27protected:
28    BitSet32 b1;
29    BitSet32 b2;
30    virtual void TearDown() {
31        b1.clear();
32        b2.clear();
33    }
34};
35
36
37TEST_F(BitSetTest, BitWiseOr) {
38    b1.markBit(2);
39    b2.markBit(4);
40
41    BitSet32 tmp = b1 | b2;
42    EXPECT_EQ(tmp.count(), 2u);
43    EXPECT_TRUE(tmp.hasBit(2) && tmp.hasBit(4));
44    // Check that the operator is symmetric
45    EXPECT_TRUE((b2 | b1) == (b1 | b2));
46
47    b1 |= b2;
48    EXPECT_EQ(b1.count(), 2u);
49    EXPECT_TRUE(b1.hasBit(2) && b1.hasBit(4));
50    EXPECT_TRUE(b2.hasBit(4) && b2.count() == 1u);
51}
52TEST_F(BitSetTest, BitWiseAnd_Disjoint) {
53    b1.markBit(2);
54    b1.markBit(4);
55    b1.markBit(6);
56
57    BitSet32 tmp = b1 & b2;
58    EXPECT_TRUE(tmp.isEmpty());
59    // Check that the operator is symmetric
60    EXPECT_TRUE((b2 & b1) == (b1 & b2));
61
62    b2 &= b1;
63    EXPECT_TRUE(b2.isEmpty());
64    EXPECT_EQ(b1.count(), 3u);
65    EXPECT_TRUE(b1.hasBit(2) && b1.hasBit(4) && b1.hasBit(6));
66}
67
68TEST_F(BitSetTest, BitWiseAnd_NonDisjoint) {
69    b1.markBit(2);
70    b1.markBit(4);
71    b1.markBit(6);
72    b2.markBit(3);
73    b2.markBit(6);
74    b2.markBit(9);
75
76    BitSet32 tmp = b1 & b2;
77    EXPECT_EQ(tmp.count(), 1u);
78    EXPECT_TRUE(tmp.hasBit(6));
79    // Check that the operator is symmetric
80    EXPECT_TRUE((b2 & b1) == (b1 & b2));
81
82    b1 &= b2;
83    EXPECT_EQ(b1.count(), 1u);
84    EXPECT_EQ(b2.count(), 3u);
85    EXPECT_TRUE(b2.hasBit(3) && b2.hasBit(6) && b2.hasBit(9));
86}
87} // namespace android
88