1 /*
2 * Copyright (C) 2012 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 "Vector_test"
18
19 #define __STDC_LIMIT_MACROS
20 #include <stdint.h>
21 #include <utils/Vector.h>
22 #include <cutils/log.h>
23 #include <gtest/gtest.h>
24 #include <unistd.h>
25
26 namespace android {
27
28 class VectorTest : public testing::Test {
29 protected:
SetUp()30 virtual void SetUp() {
31 }
32
TearDown()33 virtual void TearDown() {
34 }
35
36 public:
37 };
38
39
TEST_F(VectorTest,CopyOnWrite_CopyAndAddElements)40 TEST_F(VectorTest, CopyOnWrite_CopyAndAddElements) {
41
42 Vector<int> vector;
43 Vector<int> other;
44 vector.setCapacity(8);
45
46 vector.add(1);
47 vector.add(2);
48 vector.add(3);
49
50 EXPECT_EQ(3U, vector.size());
51
52 // copy the vector
53 other = vector;
54
55 EXPECT_EQ(3U, other.size());
56
57 // add an element to the first vector
58 vector.add(4);
59
60 // make sure the sizes are correct
61 EXPECT_EQ(4U, vector.size());
62 EXPECT_EQ(3U, other.size());
63
64 // add an element to the copy
65 other.add(5);
66
67 // make sure the sizes are correct
68 EXPECT_EQ(4U, vector.size());
69 EXPECT_EQ(4U, other.size());
70
71 // make sure the content of both vectors are correct
72 EXPECT_EQ(vector[3], 4);
73 EXPECT_EQ(other[3], 5);
74 }
75
76 // TODO: gtest isn't capable of parsing Abort messages formatted by
77 // Android (fails differently on host and target), so we always need to
78 // use an empty error message for death tests.
TEST_F(VectorTest,SetCapacity_Overflow)79 TEST_F(VectorTest, SetCapacity_Overflow) {
80 Vector<int> vector;
81 EXPECT_DEATH(vector.setCapacity(SIZE_MAX / sizeof(int) + 1), "");
82 }
83
TEST_F(VectorTest,SetCapacity_ShrinkBelowSize)84 TEST_F(VectorTest, SetCapacity_ShrinkBelowSize) {
85 Vector<int> vector;
86 vector.add(1);
87 vector.add(2);
88 vector.add(3);
89 vector.add(4);
90
91 vector.setCapacity(8);
92 ASSERT_EQ(8, vector.capacity());
93 vector.setCapacity(2);
94 ASSERT_EQ(8, vector.capacity());
95 }
96
97 // NOTE: All of the tests below are useless because of the "TODO" above.
98 // We have no way of knowing *why* the process crashed. Given that we're
99 // inserting a NULL array, we'll fail with a SIGSEGV eventually. We need
100 // the ability to make assertions on the abort message to make sure we're
101 // failing for the right reasons.
TEST_F(VectorTest,_grow_OverflowSize)102 TEST_F(VectorTest, _grow_OverflowSize) {
103 Vector<int> vector;
104 vector.add(1);
105
106 // Checks that the size calculation (not the capacity calculation) doesn't
107 // overflow : the size here will be (1 + SIZE_MAX).
108 //
109 // EXPECT_DEATH(vector.insertArrayAt(NULL, 0, SIZE_MAX), "new_size_overflow");
110 EXPECT_DEATH(vector.insertArrayAt(NULL, 0, SIZE_MAX), "");
111 }
112
TEST_F(VectorTest,_grow_OverflowCapacityDoubling)113 TEST_F(VectorTest, _grow_OverflowCapacityDoubling) {
114 Vector<int> vector;
115
116 // This should fail because the calculated capacity will overflow even though
117 // the size of the vector doesn't.
118 //
119 // EXPECT_DEATH(vector.insertArrayAt(NULL, 0, (SIZE_MAX - 1)), "new_capacity_overflow");
120 EXPECT_DEATH(vector.insertArrayAt(NULL, 0, (SIZE_MAX - 1)), "");
121 }
122
TEST_F(VectorTest,_grow_OverflowBufferAlloc)123 TEST_F(VectorTest, _grow_OverflowBufferAlloc) {
124 Vector<int> vector;
125 // This should fail because the capacity * sizeof(int) overflows, even
126 // though the capacity itself doesn't.
127 //
128 // EXPECT_DEATH(vector.insertArrayAt(NULL, 0, (SIZE_MAX / 2)), "new_alloc_size overflow");
129 EXPECT_DEATH(vector.insertArrayAt(NULL, 0, (SIZE_MAX / 2)), "");
130 }
131
TEST_F(VectorTest,editArray_Shared)132 TEST_F(VectorTest, editArray_Shared) {
133 Vector<int> vector1;
134 vector1.add(1);
135 vector1.add(2);
136 vector1.add(3);
137 vector1.add(4);
138
139 Vector<int> vector2 = vector1;
140 ASSERT_EQ(vector1.array(), vector2.array());
141 // We must make a copy here, since we're not the exclusive owners
142 // of this array.
143 ASSERT_NE(vector1.editArray(), vector2.editArray());
144
145 // Vector doesn't implement operator ==.
146 ASSERT_EQ(vector1.size(), vector2.size());
147 for (size_t i = 0; i < vector1.size(); ++i) {
148 EXPECT_EQ(vector1[i], vector2[i]);
149 }
150 }
151
152 } // namespace android
153