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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 "wtf/typed_arrays/ArrayBufferBuilder.h" | |
32 | |
33 #include "testing/gtest/include/gtest/gtest.h" | |
34 #include "wtf/Assertions.h" | |
35 #include <limits.h> | |
36 #include <string.h> | |
37 | |
38 namespace WTF { | |
39 | |
40 TEST(ArrayBufferBuilderTest, Constructor) { | |
41 ArrayBufferBuilder zeroBuilder(0); | |
42 EXPECT_EQ(0u, zeroBuilder.byteLength()); | |
43 EXPECT_EQ(0u, zeroBuilder.capacity()); | |
44 | |
45 ArrayBufferBuilder smallBuilder(1024); | |
46 EXPECT_EQ(0u, zeroBuilder.byteLength()); | |
47 EXPECT_EQ(1024u, smallBuilder.capacity()); | |
48 | |
49 ArrayBufferBuilder bigBuilder(2048); | |
50 EXPECT_EQ(0u, zeroBuilder.byteLength()); | |
51 EXPECT_EQ(2048u, bigBuilder.capacity()); | |
52 } | |
53 | |
54 TEST(ArrayBufferBuilderTest, Append) { | |
55 const char data[] = "HelloWorld"; | |
56 size_t dataSize = sizeof(data) - 1; | |
57 | |
58 ArrayBufferBuilder builder(2 * dataSize); | |
59 | |
60 EXPECT_EQ(dataSize, builder.append(data, dataSize)); | |
61 EXPECT_EQ(dataSize, builder.byteLength()); | |
62 EXPECT_EQ(dataSize * 2, builder.capacity()); | |
63 | |
64 EXPECT_EQ(dataSize, builder.append(data, dataSize)); | |
65 EXPECT_EQ(dataSize * 2, builder.byteLength()); | |
66 EXPECT_EQ(dataSize * 2, builder.capacity()); | |
67 | |
68 EXPECT_EQ(dataSize, builder.append(data, dataSize)); | |
69 EXPECT_EQ(dataSize * 3, builder.byteLength()); | |
70 EXPECT_GE(builder.capacity(), dataSize * 3); | |
71 } | |
72 | |
73 TEST(ArrayBufferBuilderTest, AppendRepeatedly) { | |
74 const char data[] = "HelloWorld"; | |
75 size_t dataSize = sizeof(data) - 1; | |
76 | |
77 ArrayBufferBuilder builder(37); // Some number coprime with dataSize. | |
78 | |
79 for (size_t i = 1; i < 1000U; ++i) { | |
80 EXPECT_EQ(dataSize, builder.append(data, dataSize)); | |
81 EXPECT_EQ(dataSize * i, builder.byteLength()); | |
82 EXPECT_GE(builder.capacity(), dataSize * i); | |
83 } | |
84 } | |
85 | |
86 TEST(ArrayBufferBuilderTest, DefaultConstructorAndAppendRepeatedly) { | |
87 const char data[] = "HelloWorld"; | |
88 size_t dataSize = sizeof(data) - 1; | |
89 | |
90 ArrayBufferBuilder builder; | |
91 | |
92 for (size_t i = 1; i < 4000U; ++i) { | |
93 EXPECT_EQ(dataSize, builder.append(data, dataSize)); | |
94 EXPECT_EQ(dataSize * i, builder.byteLength()); | |
95 EXPECT_GE(builder.capacity(), dataSize * i); | |
96 } | |
97 } | |
98 | |
99 TEST(ArrayBufferBuilderTest, AppendFixedCapacity) { | |
100 const char data[] = "HelloWorld"; | |
101 size_t dataSize = sizeof(data) - 1; | |
102 | |
103 ArrayBufferBuilder builder(15); | |
104 builder.setVariableCapacity(false); | |
105 | |
106 EXPECT_EQ(dataSize, builder.append(data, dataSize)); | |
107 EXPECT_EQ(dataSize, builder.byteLength()); | |
108 EXPECT_EQ(15u, builder.capacity()); | |
109 | |
110 EXPECT_EQ(5u, builder.append(data, dataSize)); | |
111 EXPECT_EQ(15u, builder.byteLength()); | |
112 EXPECT_EQ(15u, builder.capacity()); | |
113 | |
114 EXPECT_EQ(0u, builder.append(data, dataSize)); | |
115 EXPECT_EQ(15u, builder.byteLength()); | |
116 EXPECT_EQ(15u, builder.capacity()); | |
117 } | |
118 | |
119 TEST(ArrayBufferBuilderTest, ToArrayBuffer) { | |
120 const char data1[] = "HelloWorld"; | |
121 size_t data1Size = sizeof(data1) - 1; | |
122 | |
123 const char data2[] = "GoodbyeWorld"; | |
124 size_t data2Size = sizeof(data2) - 1; | |
125 | |
126 ArrayBufferBuilder builder(1024); | |
127 builder.append(data1, data1Size); | |
128 builder.append(data2, data2Size); | |
129 | |
130 const char expected[] = "HelloWorldGoodbyeWorld"; | |
131 size_t expectedSize = sizeof(expected) - 1; | |
132 | |
133 RefPtr<ArrayBuffer> result = builder.toArrayBuffer(); | |
134 ASSERT_EQ(data1Size + data2Size, result->byteLength()); | |
135 ASSERT_EQ(expectedSize, result->byteLength()); | |
136 EXPECT_EQ(0, memcmp(expected, result->data(), expectedSize)); | |
137 } | |
138 | |
139 TEST(ArrayBufferBuilderTest, ToArrayBufferSameAddressIfExactCapacity) { | |
140 const char data[] = "HelloWorld"; | |
141 size_t dataSize = sizeof(data) - 1; | |
142 | |
143 ArrayBufferBuilder builder(dataSize); | |
144 builder.append(data, dataSize); | |
145 | |
146 RefPtr<ArrayBuffer> result1 = builder.toArrayBuffer(); | |
147 RefPtr<ArrayBuffer> result2 = builder.toArrayBuffer(); | |
148 EXPECT_EQ(result1.get(), result2.get()); | |
149 } | |
150 | |
151 TEST(ArrayBufferBuilderTest, ToString) { | |
152 const char data1[] = "HelloWorld"; | |
153 size_t data1Size = sizeof(data1) - 1; | |
154 | |
155 const char data2[] = "GoodbyeWorld"; | |
156 size_t data2Size = sizeof(data2) - 1; | |
157 | |
158 ArrayBufferBuilder builder(1024); | |
159 builder.append(data1, data1Size); | |
160 builder.append(data2, data2Size); | |
161 | |
162 const char expected[] = "HelloWorldGoodbyeWorld"; | |
163 size_t expectedSize = sizeof(expected) - 1; | |
164 | |
165 String result = builder.toString(); | |
166 EXPECT_EQ(expectedSize, result.length()); | |
167 for (unsigned i = 0; i < result.length(); ++i) | |
168 EXPECT_EQ(expected[i], result[i]); | |
169 } | |
170 | |
171 TEST(ArrayBufferBuilderTest, ShrinkToFitNoAppend) { | |
172 ArrayBufferBuilder builder(1024); | |
173 EXPECT_EQ(1024u, builder.capacity()); | |
174 builder.shrinkToFit(); | |
175 EXPECT_EQ(0u, builder.byteLength()); | |
176 EXPECT_EQ(0u, builder.capacity()); | |
177 } | |
178 | |
179 TEST(ArrayBufferBuilderTest, ShrinkToFit) { | |
180 const char data[] = "HelloWorld"; | |
181 size_t dataSize = sizeof(data) - 1; | |
182 | |
183 ArrayBufferBuilder builder(32); | |
184 | |
185 EXPECT_EQ(dataSize, builder.append(data, dataSize)); | |
186 EXPECT_EQ(dataSize, builder.byteLength()); | |
187 EXPECT_EQ(32u, builder.capacity()); | |
188 | |
189 builder.shrinkToFit(); | |
190 EXPECT_EQ(dataSize, builder.byteLength()); | |
191 EXPECT_EQ(dataSize, builder.capacity()); | |
192 } | |
193 | |
194 TEST(ArrayBufferBuilderTest, ShrinkToFitFullyUsed) { | |
195 const char data[] = "HelloWorld"; | |
196 size_t dataSize = sizeof(data) - 1; | |
197 | |
198 ArrayBufferBuilder builder(dataSize); | |
199 const void* internalAddress = builder.data(); | |
200 | |
201 EXPECT_EQ(dataSize, builder.append(data, dataSize)); | |
202 EXPECT_EQ(dataSize, builder.byteLength()); | |
203 EXPECT_EQ(dataSize, builder.capacity()); | |
204 | |
205 builder.shrinkToFit(); | |
206 // Reallocation should not happen. | |
207 EXPECT_EQ(internalAddress, builder.data()); | |
208 EXPECT_EQ(dataSize, builder.byteLength()); | |
209 EXPECT_EQ(dataSize, builder.capacity()); | |
210 } | |
211 | |
212 TEST(ArrayBufferBuilderTest, ShrinkToFitAfterGrowth) { | |
213 const char data[] = "HelloWorld"; | |
214 size_t dataSize = sizeof(data) - 1; | |
215 | |
216 ArrayBufferBuilder builder(5); | |
217 | |
218 EXPECT_EQ(dataSize, builder.append(data, dataSize)); | |
219 EXPECT_GE(builder.capacity(), dataSize); | |
220 builder.shrinkToFit(); | |
221 EXPECT_EQ(dataSize, builder.byteLength()); | |
222 EXPECT_EQ(dataSize, builder.capacity()); | |
223 } | |
224 | |
225 } // namespace WTF | |
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