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      1 /*
      2  * Copyright (C) 2013 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 
     33 #include "core/platform/SharedBuffer.h"
     34 
     35 #include "wtf/ArrayBuffer.h"
     36 #include "wtf/RefPtr.h"
     37 #include "wtf/Vector.h"
     38 #include <gtest/gtest.h>
     39 
     40 using namespace WebCore;
     41 
     42 namespace {
     43 
     44 TEST(SharedBufferTest, getAsArrayBuffer)
     45 {
     46     char testData0[] = "Hello";
     47     char testData1[] = "World";
     48     char testData2[] = "Goodbye";
     49 
     50     RefPtr<SharedBuffer> sharedBuffer = SharedBuffer::create(testData0, strlen(testData0));
     51     sharedBuffer->append(testData1, strlen(testData1));
     52     sharedBuffer->append(testData2, strlen(testData2));
     53 
     54     RefPtr<ArrayBuffer> arrayBuffer = sharedBuffer->getAsArrayBuffer();
     55 
     56     char expectedConcatenation[] = "HelloWorldGoodbye";
     57     ASSERT_EQ(strlen(expectedConcatenation), arrayBuffer->byteLength());
     58     EXPECT_EQ(0, memcmp(expectedConcatenation, arrayBuffer->data(), strlen(expectedConcatenation)));
     59 }
     60 
     61 TEST(SharedBufferTest, moveToAvoidsMemcpy)
     62 {
     63     char testData[] = "Hello";
     64 
     65     RefPtr<SharedBuffer> sharedBuffer = SharedBuffer::create(testData, strlen(testData));
     66 
     67     const char* originalData = sharedBuffer->data();
     68     const size_t originalSize = sharedBuffer->size();
     69 
     70     Vector<char> result;
     71     sharedBuffer->moveTo(result);
     72 
     73     EXPECT_TRUE(sharedBuffer->isEmpty());
     74     EXPECT_EQ(originalData, result.data());
     75     EXPECT_EQ(originalSize, result.size());
     76 }
     77 
     78 TEST(SharedBufferTest, moveToHandlesSegments)
     79 {
     80     Vector<char> vector0(0x4000);
     81     for (size_t i = 0; i < vector0.size(); ++i)
     82         vector0[i] = 'a';
     83     Vector<char> vector1(0x4000);
     84     for (size_t i = 0; i < vector1.size(); ++i)
     85         vector1[i] = 'b';
     86     Vector<char> vector2(0x4000);
     87     for (size_t i = 0; i < vector2.size(); ++i)
     88         vector2[i] = 'c';
     89 
     90     RefPtr<SharedBuffer> sharedBuffer = SharedBuffer::adoptVector(vector0);
     91     sharedBuffer->append(vector1);
     92     sharedBuffer->append(vector2);
     93 
     94     const size_t originalSize = sharedBuffer->size();
     95 
     96     Vector<char> result;
     97     sharedBuffer->moveTo(result);
     98 
     99     EXPECT_TRUE(sharedBuffer->isEmpty());
    100     EXPECT_EQ(originalSize, result.size());
    101 }
    102 
    103 TEST(SharedBufferTest, getAsArrayBufferLargeSegments)
    104 {
    105     Vector<char> vector0(0x4000);
    106     for (size_t i = 0; i < vector0.size(); ++i)
    107         vector0[i] = 'a';
    108     Vector<char> vector1(0x4000);
    109     for (size_t i = 0; i < vector1.size(); ++i)
    110         vector1[i] = 'b';
    111     Vector<char> vector2(0x4000);
    112     for (size_t i = 0; i < vector2.size(); ++i)
    113         vector2[i] = 'c';
    114 
    115     RefPtr<SharedBuffer> sharedBuffer = SharedBuffer::adoptVector(vector0);
    116     sharedBuffer->append(vector1);
    117     sharedBuffer->append(vector2);
    118 
    119     RefPtr<ArrayBuffer> arrayBuffer = sharedBuffer->getAsArrayBuffer();
    120 
    121     ASSERT_EQ(0x4000U + 0x4000U + 0x4000U, arrayBuffer->byteLength());
    122     int position = 0;
    123     for (int i = 0; i < 0x4000; ++i) {
    124         EXPECT_EQ('a', static_cast<char*>(arrayBuffer->data())[position]);
    125         ++position;
    126     }
    127     for (int i = 0; i < 0x4000; ++i) {
    128         EXPECT_EQ('b', static_cast<char*>(arrayBuffer->data())[position]);
    129         ++position;
    130     }
    131     for (int i = 0; i < 0x4000; ++i) {
    132         EXPECT_EQ('c', static_cast<char*>(arrayBuffer->data())[position]);
    133         ++position;
    134     }
    135 }
    136 
    137 TEST(SharedBufferTest, copy)
    138 {
    139     char testData[] = "Habitasse integer eros tincidunt a scelerisque! Enim elit? Scelerisque magnis,"
    140         "et montes ultrices tristique a! Pid. Velit turpis, dapibus integer rhoncus sociis amet facilisis,"
    141         "adipiscing pulvinar nascetur magnis tempor sit pulvinar, massa urna enim porttitor sociis sociis proin enim?"
    142         "Lectus, platea dolor, integer a. A habitasse hac nunc, nunc, nec placerat vut in sit nunc nec, sed. Sociis,"
    143         "vut! Hac, velit rhoncus facilisis. Rhoncus et, enim, sed et in tristique nunc montes,"
    144         "natoque nunc sagittis elementum parturient placerat dolor integer? Pulvinar,"
    145         "magnis dignissim porttitor ac pulvinar mid tempor. A risus sed mid! Magnis elit duis urna,"
    146         "cras massa, magna duis. Vut magnis pid a! Penatibus aliquet porttitor nunc, adipiscing massa odio lundium,"
    147         "risus elementum ac turpis massa pellentesque parturient augue. Purus amet turpis pid aliquam?"
    148         "Dolor est tincidunt? Dolor? Dignissim porttitor sit in aliquam! Tincidunt, non nunc, rhoncus dictumst!"
    149         "Porta augue etiam. Cursus augue nunc lacus scelerisque. Rhoncus lectus, integer hac, nec pulvinar augue massa,"
    150         "integer amet nisi facilisis? A! A, enim velit pulvinar elit in non scelerisque in et ultricies amet est!"
    151         "in porttitor montes lorem et, hac aliquet pellentesque a sed? Augue mid purus ridiculus vel dapibus,"
    152         "sagittis sed, tortor auctor nascetur rhoncus nec, rhoncus, magna integer. Sit eu massa vut?"
    153         "Porta augue porttitor elementum, enim, rhoncus pulvinar duis integer scelerisque rhoncus natoque,"
    154         "mattis dignissim massa ac pulvinar urna, nunc ut. Sagittis, aliquet penatibus proin lorem, pulvinar lectus,"
    155         "augue proin! Ac, arcu quis. Placerat habitasse, ridiculus ridiculus.";
    156 
    157     unsigned length = strlen(testData);
    158     RefPtr<SharedBuffer> sharedBuffer = SharedBuffer::create(testData, length);
    159     sharedBuffer->append(testData, length);
    160     sharedBuffer->append(testData, length);
    161     sharedBuffer->append(testData, length);
    162     // sharedBuffer must contain data more than segmentSize (= 0x1000) to check copy().
    163     ASSERT_EQ(length * 4, sharedBuffer->size());
    164 
    165     RefPtr<SharedBuffer> clone = sharedBuffer->copy();
    166     ASSERT_EQ(length * 4, clone->size());
    167     ASSERT_EQ(0, memcmp(clone->data(), sharedBuffer->data(), clone->size()));
    168 
    169     clone->append(testData, length);
    170     ASSERT_EQ(length * 5, clone->size());
    171 }
    172 
    173 } // namespace
    174