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
24 namespace android {
25
26 class BitSetTest : public testing::Test {
27 protected:
28 BitSet32 b1;
29 BitSet32 b2;
TearDown()30 virtual void TearDown() {
31 b1.clear();
32 b2.clear();
33 }
34 };
35
36
TEST_F(BitSetTest,BitWiseOr)37 TEST_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 }
TEST_F(BitSetTest,BitWiseAnd_Disjoint)52 TEST_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
TEST_F(BitSetTest,BitWiseAnd_NonDisjoint)68 TEST_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