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/*
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "wtf/ArrayBufferBuilder.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "wtf/Assertions.h"
#include <limits.h>
#include <string.h>
namespace WTF {
TEST(ArrayBufferBuilderTest, Constructor)
{
ArrayBufferBuilder zeroBuilder(0);
EXPECT_EQ(0u, zeroBuilder.byteLength());
EXPECT_EQ(0u, zeroBuilder.capacity());
ArrayBufferBuilder smallBuilder(1024);
EXPECT_EQ(0u, zeroBuilder.byteLength());
EXPECT_EQ(1024u, smallBuilder.capacity());
ArrayBufferBuilder bigBuilder(2048);
EXPECT_EQ(0u, zeroBuilder.byteLength());
EXPECT_EQ(2048u, bigBuilder.capacity());
}
TEST(ArrayBufferBuilderTest, Append)
{
const char data[] = "HelloWorld";
size_t dataSize = sizeof(data) - 1;
ArrayBufferBuilder builder(2 * dataSize);
EXPECT_EQ(dataSize, builder.append(data, dataSize));
EXPECT_EQ(dataSize, builder.byteLength());
EXPECT_EQ(dataSize * 2, builder.capacity());
EXPECT_EQ(dataSize, builder.append(data, dataSize));
EXPECT_EQ(dataSize * 2, builder.byteLength());
EXPECT_EQ(dataSize * 2, builder.capacity());
EXPECT_EQ(dataSize, builder.append(data, dataSize));
EXPECT_EQ(dataSize * 3, builder.byteLength());
EXPECT_GE(builder.capacity(), dataSize * 3);
}
TEST(ArrayBufferBuilderTest, AppendRepeatedly)
{
const char data[] = "HelloWorld";
size_t dataSize = sizeof(data) - 1;
ArrayBufferBuilder builder(37); // Some number coprime with dataSize.
for (size_t i = 1; i < 1000U; ++i) {
EXPECT_EQ(dataSize, builder.append(data, dataSize));
EXPECT_EQ(dataSize * i, builder.byteLength());
EXPECT_GE(builder.capacity(), dataSize * i);
}
}
TEST(ArrayBufferBuilderTest, DefaultConstructorAndAppendRepeatedly)
{
const char data[] = "HelloWorld";
size_t dataSize = sizeof(data) - 1;
ArrayBufferBuilder builder;
for (size_t i = 1; i < 4000U; ++i) {
EXPECT_EQ(dataSize, builder.append(data, dataSize));
EXPECT_EQ(dataSize * i, builder.byteLength());
EXPECT_GE(builder.capacity(), dataSize * i);
}
}
TEST(ArrayBufferBuilderTest, AppendFixedCapacity)
{
const char data[] = "HelloWorld";
size_t dataSize = sizeof(data) - 1;
ArrayBufferBuilder builder(15);
builder.setVariableCapacity(false);
EXPECT_EQ(dataSize, builder.append(data, dataSize));
EXPECT_EQ(dataSize, builder.byteLength());
EXPECT_EQ(15u, builder.capacity());
EXPECT_EQ(5u, builder.append(data, dataSize));
EXPECT_EQ(15u, builder.byteLength());
EXPECT_EQ(15u, builder.capacity());
EXPECT_EQ(0u, builder.append(data, dataSize));
EXPECT_EQ(15u, builder.byteLength());
EXPECT_EQ(15u, builder.capacity());
}
TEST(ArrayBufferBuilderTest, ToArrayBuffer)
{
const char data1[] = "HelloWorld";
size_t data1Size = sizeof(data1) - 1;
const char data2[] = "GoodbyeWorld";
size_t data2Size = sizeof(data2) - 1;
ArrayBufferBuilder builder(1024);
builder.append(data1, data1Size);
builder.append(data2, data2Size);
const char expected[] = "HelloWorldGoodbyeWorld";
size_t expectedSize = sizeof(expected) - 1;
RefPtr<ArrayBuffer> result = builder.toArrayBuffer();
ASSERT_EQ(data1Size + data2Size, result->byteLength());
ASSERT_EQ(expectedSize, result->byteLength());
EXPECT_EQ(0, memcmp(expected, result->data(), expectedSize));
}
TEST(ArrayBufferBuilderTest, ToArrayBufferSameAddressIfExactCapacity)
{
const char data[] = "HelloWorld";
size_t dataSize = sizeof(data) - 1;
ArrayBufferBuilder builder(dataSize);
builder.append(data, dataSize);
RefPtr<ArrayBuffer> result1 = builder.toArrayBuffer();
RefPtr<ArrayBuffer> result2 = builder.toArrayBuffer();
EXPECT_EQ(result1.get(), result2.get());
}
TEST(ArrayBufferBuilderTest, ToString)
{
const char data1[] = "HelloWorld";
size_t data1Size = sizeof(data1) - 1;
const char data2[] = "GoodbyeWorld";
size_t data2Size = sizeof(data2) - 1;
ArrayBufferBuilder builder(1024);
builder.append(data1, data1Size);
builder.append(data2, data2Size);
const char expected[] = "HelloWorldGoodbyeWorld";
size_t expectedSize = sizeof(expected) - 1;
String result = builder.toString();
EXPECT_EQ(expectedSize, result.length());
for (unsigned i = 0; i < result.length(); ++i)
EXPECT_EQ(expected[i], result[i]);
}
TEST(ArrayBufferBuilderTest, ShrinkToFitNoAppend)
{
ArrayBufferBuilder builder(1024);
EXPECT_EQ(1024u, builder.capacity());
builder.shrinkToFit();
EXPECT_EQ(0u, builder.byteLength());
EXPECT_EQ(0u, builder.capacity());
}
TEST(ArrayBufferBuilderTest, ShrinkToFit)
{
const char data[] = "HelloWorld";
size_t dataSize = sizeof(data) - 1;
ArrayBufferBuilder builder(32);
EXPECT_EQ(dataSize, builder.append(data, dataSize));
EXPECT_EQ(dataSize, builder.byteLength());
EXPECT_EQ(32u, builder.capacity());
builder.shrinkToFit();
EXPECT_EQ(dataSize, builder.byteLength());
EXPECT_EQ(dataSize, builder.capacity());
}
TEST(ArrayBufferBuilderTest, ShrinkToFitFullyUsed)
{
const char data[] = "HelloWorld";
size_t dataSize = sizeof(data) - 1;
ArrayBufferBuilder builder(dataSize);
const void* internalAddress = builder.data();
EXPECT_EQ(dataSize, builder.append(data, dataSize));
EXPECT_EQ(dataSize, builder.byteLength());
EXPECT_EQ(dataSize, builder.capacity());
builder.shrinkToFit();
// Reallocation should not happen.
EXPECT_EQ(internalAddress, builder.data());
EXPECT_EQ(dataSize, builder.byteLength());
EXPECT_EQ(dataSize, builder.capacity());
}
TEST(ArrayBufferBuilderTest, ShrinkToFitAfterGrowth)
{
const char data[] = "HelloWorld";
size_t dataSize = sizeof(data) - 1;
ArrayBufferBuilder builder(5);
EXPECT_EQ(dataSize, builder.append(data, dataSize));
EXPECT_GE(builder.capacity(), dataSize);
builder.shrinkToFit();
EXPECT_EQ(dataSize, builder.byteLength());
EXPECT_EQ(dataSize, builder.capacity());
}
} // namespace WTF