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 <algorithm> 34 #include <cstdlib> 35 36 #include "platform/SharedBuffer.h" 37 #include "platform/TestingPlatformSupport.h" 38 #include "public/platform/WebDiscardableMemory.h" 39 40 #include "wtf/ArrayBuffer.h" 41 #include "wtf/RefPtr.h" 42 #include "wtf/Vector.h" 43 #include <gtest/gtest.h> 44 45 using namespace blink; 46 47 namespace { 48 49 TEST(SharedBufferTest, getAsArrayBuffer) 50 { 51 char testData0[] = "Hello"; 52 char testData1[] = "World"; 53 char testData2[] = "Goodbye"; 54 55 RefPtr<SharedBuffer> sharedBuffer = SharedBuffer::create(testData0, strlen(testData0)); 56 sharedBuffer->append(testData1, strlen(testData1)); 57 sharedBuffer->append(testData2, strlen(testData2)); 58 59 RefPtr<ArrayBuffer> arrayBuffer = sharedBuffer->getAsArrayBuffer(); 60 61 char expectedConcatenation[] = "HelloWorldGoodbye"; 62 ASSERT_EQ(strlen(expectedConcatenation), arrayBuffer->byteLength()); 63 EXPECT_EQ(0, memcmp(expectedConcatenation, arrayBuffer->data(), strlen(expectedConcatenation))); 64 } 65 66 TEST(SharedBufferTest, getAsArrayBufferLargeSegments) 67 { 68 Vector<char> vector0(0x4000); 69 for (size_t i = 0; i < vector0.size(); ++i) 70 vector0[i] = 'a'; 71 Vector<char> vector1(0x4000); 72 for (size_t i = 0; i < vector1.size(); ++i) 73 vector1[i] = 'b'; 74 Vector<char> vector2(0x4000); 75 for (size_t i = 0; i < vector2.size(); ++i) 76 vector2[i] = 'c'; 77 78 RefPtr<SharedBuffer> sharedBuffer = SharedBuffer::adoptVector(vector0); 79 sharedBuffer->append(vector1); 80 sharedBuffer->append(vector2); 81 82 RefPtr<ArrayBuffer> arrayBuffer = sharedBuffer->getAsArrayBuffer(); 83 84 ASSERT_EQ(0x4000U + 0x4000U + 0x4000U, arrayBuffer->byteLength()); 85 int position = 0; 86 for (int i = 0; i < 0x4000; ++i) { 87 EXPECT_EQ('a', static_cast<char*>(arrayBuffer->data())[position]); 88 ++position; 89 } 90 for (int i = 0; i < 0x4000; ++i) { 91 EXPECT_EQ('b', static_cast<char*>(arrayBuffer->data())[position]); 92 ++position; 93 } 94 for (int i = 0; i < 0x4000; ++i) { 95 EXPECT_EQ('c', static_cast<char*>(arrayBuffer->data())[position]); 96 ++position; 97 } 98 } 99 100 TEST(SharedBufferTest, copy) 101 { 102 Vector<char> testData(10000); 103 std::generate(testData.begin(), testData.end(), &std::rand); 104 105 unsigned length = testData.size(); 106 RefPtr<SharedBuffer> sharedBuffer = SharedBuffer::create(testData.data(), length); 107 sharedBuffer->append(testData.data(), length); 108 sharedBuffer->append(testData.data(), length); 109 sharedBuffer->append(testData.data(), length); 110 // sharedBuffer must contain data more than segmentSize (= 0x1000) to check copy(). 111 ASSERT_EQ(length * 4, sharedBuffer->size()); 112 113 RefPtr<SharedBuffer> clone = sharedBuffer->copy(); 114 ASSERT_EQ(length * 4, clone->size()); 115 ASSERT_EQ(0, memcmp(clone->data(), sharedBuffer->data(), clone->size())); 116 117 clone->append(testData.data(), length); 118 ASSERT_EQ(length * 5, clone->size()); 119 } 120 121 TEST(SharedBufferTest, constructorWithSizeOnly) 122 { 123 unsigned length = 10000; 124 RefPtr<SharedBuffer> sharedBuffer = SharedBuffer::create(length); 125 ASSERT_EQ(length, sharedBuffer->size()); 126 127 // The internal flat buffer should have been resized to |length| therefore getSomeData() should 128 // directly return the full size. 129 const char* data; 130 ASSERT_EQ(length, sharedBuffer->getSomeData(data, 0)); 131 } 132 133 TEST(SharedBufferTest, createPurgeable) 134 { 135 Vector<char> testData(30000); 136 std::generate(testData.begin(), testData.end(), &std::rand); 137 138 TestingPlatformSupport::Config config; 139 config.hasDiscardableMemorySupport = true; 140 TestingPlatformSupport platformWithDiscardableMemorySupport(config); 141 142 unsigned length = testData.size(); 143 RefPtr<SharedBuffer> sharedBuffer = SharedBuffer::createPurgeable(testData.data(), length); 144 ASSERT_EQ(length, sharedBuffer->size()); 145 // Merge the segments into a single vector. 146 const char* data = sharedBuffer->data(); 147 ASSERT_EQ(0, memcmp(data, testData.data(), length)); 148 149 // Do another append + merge the segments again. 150 size_t previousTestDataSize = testData.size(); 151 testData.resize(2 * previousTestDataSize); 152 std::generate(testData.begin() + previousTestDataSize, testData.end(), &std::rand); 153 sharedBuffer->append(testData.data() + previousTestDataSize, previousTestDataSize); 154 ASSERT_EQ(0, memcmp(data, testData.data(), length)); 155 } 156 157 } // namespace 158
