BigBuffer_test.cpp revision a45893a5c51cc26f1fd63ec1aa4c39f55911c85b 
1/*
2 * Copyright (C) 2015 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#include "util/BigBuffer.h"
18
19#include "test/Test.h"
20
21using ::testing::NotNull;
22
23namespace aapt {
24
25TEST(BigBufferTest, AllocateSingleBlock) {
26  BigBuffer buffer(4);
27
28  EXPECT_THAT(buffer.NextBlock<char>(2), NotNull());
29  EXPECT_EQ(2u, buffer.size());
30}
31
32TEST(BigBufferTest, ReturnSameBlockIfNextAllocationFits) {
33  BigBuffer buffer(16);
34
35  char* b1 = buffer.NextBlock<char>(8);
36  EXPECT_THAT(b1, NotNull());
37
38  char* b2 = buffer.NextBlock<char>(4);
39  EXPECT_THAT(b2, NotNull());
40
41  EXPECT_EQ(b1 + 8, b2);
42}
43
44TEST(BigBufferTest, AllocateExactSizeBlockIfLargerThanBlockSize) {
45  BigBuffer buffer(16);
46
47  EXPECT_THAT(buffer.NextBlock<char>(32), NotNull());
48  EXPECT_EQ(32u, buffer.size());
49}
50
51TEST(BigBufferTest, AppendAndMoveBlock) {
52  BigBuffer buffer(16);
53
54  uint32_t* b1 = buffer.NextBlock<uint32_t>();
55  ASSERT_THAT(b1, NotNull());
56  *b1 = 33;
57
58  {
59    BigBuffer buffer2(16);
60    b1 = buffer2.NextBlock<uint32_t>();
61    ASSERT_THAT(b1, NotNull());
62    *b1 = 44;
63
64    buffer.AppendBuffer(std::move(buffer2));
65    EXPECT_EQ(0u, buffer2.size());
66    EXPECT_EQ(buffer2.begin(), buffer2.end());
67  }
68
69  EXPECT_EQ(2 * sizeof(uint32_t), buffer.size());
70
71  auto b = buffer.begin();
72  ASSERT_NE(b, buffer.end());
73  ASSERT_EQ(sizeof(uint32_t), b->size);
74  ASSERT_EQ(33u, *reinterpret_cast<uint32_t*>(b->buffer.get()));
75  ++b;
76
77  ASSERT_NE(b, buffer.end());
78  ASSERT_EQ(sizeof(uint32_t), b->size);
79  ASSERT_EQ(44u, *reinterpret_cast<uint32_t*>(b->buffer.get()));
80  ++b;
81
82  ASSERT_EQ(b, buffer.end());
83}
84
85TEST(BigBufferTest, PadAndAlignProperly) {
86  BigBuffer buffer(16);
87
88  ASSERT_THAT(buffer.NextBlock<char>(2), NotNull());
89  ASSERT_EQ(2u, buffer.size());
90  buffer.Pad(2);
91  ASSERT_EQ(4u, buffer.size());
92  buffer.Align4();
93  ASSERT_EQ(4u, buffer.size());
94  buffer.Pad(2);
95  ASSERT_EQ(6u, buffer.size());
96  buffer.Align4();
97  ASSERT_EQ(8u, buffer.size());
98}
99
100}  // namespace aapt
101