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32 #include "wtf/ArrayBufferBuilder.h"
34 #include "wtf/Assertions.h"
35 #include <gtest/gtest.h>
41 TEST(ArrayBufferBuilderTest
, Constructor
)
43 ArrayBufferBuilder
zeroBuilder(0);
44 EXPECT_EQ(0u, zeroBuilder
.byteLength());
45 EXPECT_EQ(0u, zeroBuilder
.capacity());
47 ArrayBufferBuilder
smallBuilder(1024);
48 EXPECT_EQ(0u, zeroBuilder
.byteLength());
49 EXPECT_EQ(1024u, smallBuilder
.capacity());
51 ArrayBufferBuilder
bigBuilder(2048);
52 EXPECT_EQ(0u, zeroBuilder
.byteLength());
53 EXPECT_EQ(2048u, bigBuilder
.capacity());
56 TEST(ArrayBufferBuilderTest
, Append
)
58 const char data
[] = "HelloWorld";
59 size_t dataSize
= sizeof(data
) - 1;
61 ArrayBufferBuilder
builder(2 * dataSize
);
63 EXPECT_EQ(dataSize
, builder
.append(data
, dataSize
));
64 EXPECT_EQ(dataSize
, builder
.byteLength());
65 EXPECT_EQ(dataSize
* 2, builder
.capacity());
67 EXPECT_EQ(dataSize
, builder
.append(data
, dataSize
));
68 EXPECT_EQ(dataSize
* 2, builder
.byteLength());
69 EXPECT_EQ(dataSize
* 2, builder
.capacity());
71 EXPECT_EQ(dataSize
, builder
.append(data
, dataSize
));
72 EXPECT_EQ(dataSize
* 3, builder
.byteLength());
73 EXPECT_GE(builder
.capacity(), dataSize
* 3);
76 TEST(ArrayBufferBuilderTest
, AppendRepeatedly
)
78 const char data
[] = "HelloWorld";
79 size_t dataSize
= sizeof(data
) - 1;
81 ArrayBufferBuilder
builder(37); // Some number coprime with dataSize.
83 for (size_t i
= 1; i
< 1000U; ++i
) {
84 EXPECT_EQ(dataSize
, builder
.append(data
, dataSize
));
85 EXPECT_EQ(dataSize
* i
, builder
.byteLength());
86 EXPECT_GE(builder
.capacity(), dataSize
* i
);
90 TEST(ArrayBufferBuilderTest
, DefaultConstructorAndAppendRepeatedly
)
92 const char data
[] = "HelloWorld";
93 size_t dataSize
= sizeof(data
) - 1;
95 ArrayBufferBuilder builder
;
97 for (size_t i
= 1; i
< 4000U; ++i
) {
98 EXPECT_EQ(dataSize
, builder
.append(data
, dataSize
));
99 EXPECT_EQ(dataSize
* i
, builder
.byteLength());
100 EXPECT_GE(builder
.capacity(), dataSize
* i
);
104 TEST(ArrayBufferBuilderTest
, AppendFixedCapacity
)
106 const char data
[] = "HelloWorld";
107 size_t dataSize
= sizeof(data
) - 1;
109 ArrayBufferBuilder
builder(15);
110 builder
.setVariableCapacity(false);
112 EXPECT_EQ(dataSize
, builder
.append(data
, dataSize
));
113 EXPECT_EQ(dataSize
, builder
.byteLength());
114 EXPECT_EQ(15u, builder
.capacity());
116 EXPECT_EQ(5u, builder
.append(data
, dataSize
));
117 EXPECT_EQ(15u, builder
.byteLength());
118 EXPECT_EQ(15u, builder
.capacity());
120 EXPECT_EQ(0u, builder
.append(data
, dataSize
));
121 EXPECT_EQ(15u, builder
.byteLength());
122 EXPECT_EQ(15u, builder
.capacity());
125 TEST(ArrayBufferBuilderTest
, ToArrayBuffer
)
127 const char data1
[] = "HelloWorld";
128 size_t data1Size
= sizeof(data1
) - 1;
130 const char data2
[] = "GoodbyeWorld";
131 size_t data2Size
= sizeof(data2
) - 1;
133 ArrayBufferBuilder
builder(1024);
134 builder
.append(data1
, data1Size
);
135 builder
.append(data2
, data2Size
);
137 const char expected
[] = "HelloWorldGoodbyeWorld";
138 size_t expectedSize
= sizeof(expected
) - 1;
140 RefPtr
<ArrayBuffer
> result
= builder
.toArrayBuffer();
141 ASSERT_EQ(data1Size
+ data2Size
, result
->byteLength());
142 ASSERT_EQ(expectedSize
, result
->byteLength());
143 EXPECT_EQ(0, memcmp(expected
, result
->data(), expectedSize
));
146 TEST(ArrayBufferBuilderTest
, ToArrayBufferSameAddressIfExactCapacity
)
148 const char data
[] = "HelloWorld";
149 size_t dataSize
= sizeof(data
) - 1;
151 ArrayBufferBuilder
builder(dataSize
);
152 builder
.append(data
, dataSize
);
154 RefPtr
<ArrayBuffer
> result1
= builder
.toArrayBuffer();
155 RefPtr
<ArrayBuffer
> result2
= builder
.toArrayBuffer();
156 EXPECT_EQ(result1
.get(), result2
.get());
159 TEST(ArrayBufferBuilderTest
, ToString
)
161 const char data1
[] = "HelloWorld";
162 size_t data1Size
= sizeof(data1
) - 1;
164 const char data2
[] = "GoodbyeWorld";
165 size_t data2Size
= sizeof(data2
) - 1;
167 ArrayBufferBuilder
builder(1024);
168 builder
.append(data1
, data1Size
);
169 builder
.append(data2
, data2Size
);
171 const char expected
[] = "HelloWorldGoodbyeWorld";
172 size_t expectedSize
= sizeof(expected
) - 1;
174 String result
= builder
.toString();
175 EXPECT_EQ(expectedSize
, result
.length());
176 for (unsigned i
= 0; i
< result
.length(); ++i
)
177 EXPECT_EQ(expected
[i
], result
[i
]);
180 TEST(ArrayBufferBuilderTest
, ShrinkToFitNoAppend
)
182 ArrayBufferBuilder
builder(1024);
183 EXPECT_EQ(1024u, builder
.capacity());
184 builder
.shrinkToFit();
185 EXPECT_EQ(0u, builder
.byteLength());
186 EXPECT_EQ(0u, builder
.capacity());
189 TEST(ArrayBufferBuilderTest
, ShrinkToFit
)
191 const char data
[] = "HelloWorld";
192 size_t dataSize
= sizeof(data
) - 1;
194 ArrayBufferBuilder
builder(32);
196 EXPECT_EQ(dataSize
, builder
.append(data
, dataSize
));
197 EXPECT_EQ(dataSize
, builder
.byteLength());
198 EXPECT_EQ(32u, builder
.capacity());
200 builder
.shrinkToFit();
201 EXPECT_EQ(dataSize
, builder
.byteLength());
202 EXPECT_EQ(dataSize
, builder
.capacity());
205 TEST(ArrayBufferBuilderTest
, ShrinkToFitFullyUsed
)
207 const char data
[] = "HelloWorld";
208 size_t dataSize
= sizeof(data
) - 1;
210 ArrayBufferBuilder
builder(dataSize
);
211 const void* internalAddress
= builder
.data();
213 EXPECT_EQ(dataSize
, builder
.append(data
, dataSize
));
214 EXPECT_EQ(dataSize
, builder
.byteLength());
215 EXPECT_EQ(dataSize
, builder
.capacity());
217 builder
.shrinkToFit();
218 // Reallocation should not happen.
219 EXPECT_EQ(internalAddress
, builder
.data());
220 EXPECT_EQ(dataSize
, builder
.byteLength());
221 EXPECT_EQ(dataSize
, builder
.capacity());
224 TEST(ArrayBufferBuilderTest
, ShrinkToFitAfterGrowth
)
226 const char data
[] = "HelloWorld";
227 size_t dataSize
= sizeof(data
) - 1;
229 ArrayBufferBuilder
builder(5);
231 EXPECT_EQ(dataSize
, builder
.append(data
, dataSize
));
232 EXPECT_GE(builder
.capacity(), dataSize
);
233 builder
.shrinkToFit();
234 EXPECT_EQ(dataSize
, builder
.byteLength());
235 EXPECT_EQ(dataSize
, builder
.capacity());