1/*
2 * Copyright (C) 2014 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32#include "core/xml/parser/SharedBufferReader.h"
33
34#include "platform/SharedBuffer.h"
35
36#include <algorithm>
37#include <cstdlib>
38#include <gtest/gtest.h>
39#include <vector>
40
41namespace blink {
42
43TEST(SharedBufferReaderTest, readDataWithNullSharedBuffer)
44{
45    SharedBufferReader reader(nullptr);
46    char buffer[32];
47
48    EXPECT_EQ(0, reader.readData(buffer, sizeof(buffer)));
49}
50
51TEST(SharedBufferReaderTest, readDataWith0BytesRequest)
52{
53    RefPtr<SharedBuffer> sharedBuffer = SharedBuffer::create();
54    SharedBufferReader reader(sharedBuffer);
55
56    EXPECT_EQ(0, reader.readData(0, 0));
57}
58
59TEST(SharedBufferReaderTest, readDataWithSizeBiggerThanSharedBufferSize)
60{
61    static const char testData[] = "hello";
62    RefPtr<SharedBuffer> sharedBuffer = SharedBuffer::create(testData, sizeof(testData));
63
64    SharedBufferReader reader(sharedBuffer);
65
66    const int extraBytes = 3;
67    char outputBuffer[sizeof(testData) + extraBytes];
68
69    const char initializationByte = 'a';
70    memset(outputBuffer, initializationByte, sizeof(outputBuffer));
71    EXPECT_EQ(sizeof(testData),
72        static_cast<size_t>(reader.readData(outputBuffer, sizeof(outputBuffer))));
73
74    EXPECT_TRUE(std::equal(testData, testData + sizeof(testData), outputBuffer));
75    // Check that the bytes past index sizeof(testData) were not touched.
76    EXPECT_EQ(extraBytes,
77        std::count(outputBuffer, outputBuffer + sizeof(outputBuffer), initializationByte));
78}
79
80TEST(SharedBufferReaderTest, readDataInMultiples)
81{
82    const int iterationsCount = 8;
83    const int bytesPerIteration = 64;
84
85    std::vector<char> testData(iterationsCount * bytesPerIteration);
86    std::generate(testData.begin(), testData.end(), &std::rand);
87
88    RefPtr<SharedBuffer> sharedBuffer = SharedBuffer::create(&testData[0], testData.size());
89    SharedBufferReader reader(sharedBuffer);
90
91    std::vector<char> destinationVector(testData.size());
92
93    for (int i = 0; i < iterationsCount; ++i) {
94        const int offset = i * bytesPerIteration;
95        const int bytesRead = reader.readData(&destinationVector[0] + offset, bytesPerIteration);
96        EXPECT_EQ(bytesPerIteration, bytesRead);
97    }
98
99    EXPECT_TRUE(std::equal(testData.begin(), testData.end(), destinationVector.begin()));
100}
101
102TEST(SharedBufferReaderTest, clearSharedBufferBetweenCallsToReadData)
103{
104    std::vector<char> testData(128);
105    std::generate(testData.begin(), testData.end(), &std::rand);
106
107    RefPtr<SharedBuffer> sharedBuffer = SharedBuffer::create(&testData[0], testData.size());
108    SharedBufferReader reader(sharedBuffer);
109
110    std::vector<char> destinationVector(testData.size());
111    const int bytesToRead = testData.size() / 2;
112    EXPECT_EQ(bytesToRead, reader.readData(&destinationVector[0], bytesToRead));
113
114    sharedBuffer->clear();
115
116    EXPECT_EQ(0, reader.readData(&destinationVector[0], bytesToRead));
117}
118
119} // namespace blink
120