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      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 
     41 namespace blink {
     42 
     43 TEST(SharedBufferReaderTest, readDataWithNullSharedBuffer)
     44 {
     45     SharedBufferReader reader(nullptr);
     46     char buffer[32];
     47 
     48     EXPECT_EQ(0, reader.readData(buffer, sizeof(buffer)));
     49 }
     50 
     51 TEST(SharedBufferReaderTest, readDataWith0BytesRequest)
     52 {
     53     RefPtr<SharedBuffer> sharedBuffer = SharedBuffer::create();
     54     SharedBufferReader reader(sharedBuffer);
     55 
     56     EXPECT_EQ(0, reader.readData(0, 0));
     57 }
     58 
     59 TEST(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 
     80 TEST(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 
    102 TEST(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