1/*
2 * Copyright (C) 2014 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 "dictionary/utils/buffer_with_extendable_buffer.h"
18
19#include <gtest/gtest.h>
20
21namespace latinime {
22namespace {
23
24const int DEFAULT_MAX_BUFFER_SIZE = 1024;
25
26TEST(BufferWithExtendablebufferTest, TestWriteAndRead) {
27    BufferWithExtendableBuffer buffer(DEFAULT_MAX_BUFFER_SIZE);
28    int pos = 0;
29    // 1 byte
30    const uint32_t data_1 = 0xFF;
31    EXPECT_TRUE(buffer.writeUint(data_1, 1 /* size */, pos));
32    EXPECT_EQ(data_1, buffer.readUint(1, pos));
33    pos += 1;
34    // 2 byte
35    const uint32_t data_2 = 0xFFFF;
36    EXPECT_TRUE(buffer.writeUint(data_2, 2 /* size */, pos));
37    EXPECT_EQ(data_2, buffer.readUint(2, pos));
38    pos += 2;
39    // 3 byte
40    const uint32_t data_3 = 0xFFFFFF;
41    EXPECT_TRUE(buffer.writeUint(data_3, 3 /* size */, pos));
42    EXPECT_EQ(data_3, buffer.readUint(3, pos));
43    pos += 3;
44    // 4 byte
45    const uint32_t data_4 = 0xFFFFFFFF;
46    EXPECT_TRUE(buffer.writeUint(data_4, 4 /* size */, pos));
47    EXPECT_EQ(data_4, buffer.readUint(4, pos));
48}
49
50TEST(BufferWithExtendablebufferTest, TestExtend) {
51    BufferWithExtendableBuffer buffer(DEFAULT_MAX_BUFFER_SIZE);
52    EXPECT_EQ(0, buffer.getTailPosition());
53    EXPECT_TRUE(buffer.writeUint(0xFF /* data */, 4 /* size */, 0 /* pos */));
54    EXPECT_EQ(4, buffer.getTailPosition());
55    EXPECT_TRUE(buffer.extend(8 /* size */));
56    EXPECT_EQ(12, buffer.getTailPosition());
57    EXPECT_TRUE(buffer.writeUint(0xFFFF /* data */, 4 /* size */, 8 /* pos */));
58    EXPECT_TRUE(buffer.writeUint(0xFF /* data */, 4 /* size */, 0 /* pos */));
59}
60
61TEST(BufferWithExtendablebufferTest, TestCopy) {
62    BufferWithExtendableBuffer buffer(DEFAULT_MAX_BUFFER_SIZE);
63    EXPECT_TRUE(buffer.writeUint(0xFF /* data */, 4 /* size */, 0 /* pos */));
64    EXPECT_TRUE(buffer.writeUint(0xFFFF /* data */, 4 /* size */, 4 /* pos */));
65    BufferWithExtendableBuffer targetBuffer(DEFAULT_MAX_BUFFER_SIZE);
66    EXPECT_TRUE(targetBuffer.copy(&buffer));
67    EXPECT_EQ(0xFFu, targetBuffer.readUint(4 /* size */, 0 /* pos */));
68    EXPECT_EQ(0xFFFFu, targetBuffer.readUint(4 /* size */, 4 /* pos */));
69}
70
71TEST(BufferWithExtendablebufferTest, TestSizeLimit) {
72    BufferWithExtendableBuffer emptyBuffer(0 /* maxAdditionalBufferSize */);
73    EXPECT_FALSE(emptyBuffer.writeUint(0 /* data */, 1 /* size */, 0 /* pos */));
74    EXPECT_FALSE(emptyBuffer.extend(1 /* size */));
75
76    BufferWithExtendableBuffer smallBuffer(4 /* maxAdditionalBufferSize */);
77    EXPECT_TRUE(smallBuffer.writeUint(0 /* data */, 4 /* size */, 0 /* pos */));
78    EXPECT_FALSE(smallBuffer.writeUint(0 /* data */, 1 /* size */, 4 /* pos */));
79
80    EXPECT_TRUE(smallBuffer.copy(&emptyBuffer));
81    EXPECT_FALSE(emptyBuffer.copy(&smallBuffer));
82
83    BufferWithExtendableBuffer buffer(DEFAULT_MAX_BUFFER_SIZE);
84    EXPECT_FALSE(buffer.isNearSizeLimit());
85    int pos = 0;
86    while (!buffer.isNearSizeLimit()) {
87        EXPECT_TRUE(buffer.writeUintAndAdvancePosition(0 /* data */, 4 /* size */, &pos));
88    }
89    EXPECT_GT(pos, 0);
90    EXPECT_LE(pos, DEFAULT_MAX_BUFFER_SIZE);
91}
92
93}  // namespace
94}  // namespace latinime
95