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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/vdstestlib/cppunit/macros.h>
#include <vespa/memfilepersistence/mapper/buffer.h>
namespace storage {
namespace memfile {
class BufferTest : public CppUnit::TestFixture
{
public:
void getSizeReturnsInitiallyAllocatedSize();
void getSizeReturnsUnAlignedSizeForMMappedAllocs();
void resizeRetainsExistingDataWhenSizingUp();
void resizeRetainsExistingDataWhenSizingDown();
void bufferAddressIs512ByteAligned();
CPPUNIT_TEST_SUITE(BufferTest);
CPPUNIT_TEST(getSizeReturnsInitiallyAllocatedSize);
CPPUNIT_TEST(getSizeReturnsUnAlignedSizeForMMappedAllocs);
CPPUNIT_TEST(resizeRetainsExistingDataWhenSizingUp);
CPPUNIT_TEST(resizeRetainsExistingDataWhenSizingDown);
CPPUNIT_TEST(bufferAddressIs512ByteAligned);
CPPUNIT_TEST_SUITE_END();
};
CPPUNIT_TEST_SUITE_REGISTRATION(BufferTest);
void
BufferTest::getSizeReturnsInitiallyAllocatedSize()
{
Buffer buf(1234);
CPPUNIT_ASSERT_EQUAL(size_t(1234), buf.getSize());
}
void
BufferTest::getSizeReturnsUnAlignedSizeForMMappedAllocs()
{
Buffer buf(vespalib::alloc::MemoryAllocator::HUGEPAGE_SIZE + 1);
CPPUNIT_ASSERT_EQUAL(size_t(vespalib::alloc::MemoryAllocator::HUGEPAGE_SIZE + 1), buf.getSize());
}
void
BufferTest::resizeRetainsExistingDataWhenSizingUp()
{
std::string src = "hello world";
Buffer buf(src.size());
memcpy(buf.getBuffer(), src.data(), src.size());
buf.resize(src.size() * 2);
CPPUNIT_ASSERT_EQUAL(src.size() * 2, buf.getSize());
CPPUNIT_ASSERT_EQUAL(0, memcmp(buf.getBuffer(), src.data(), src.size()));
}
void
BufferTest::resizeRetainsExistingDataWhenSizingDown()
{
std::string src = "hello world";
Buffer buf(src.size());
memcpy(buf.getBuffer(), src.data(), src.size());
buf.resize(src.size() / 2);
CPPUNIT_ASSERT_EQUAL(src.size() / 2, buf.getSize());
CPPUNIT_ASSERT_EQUAL(0, memcmp(buf.getBuffer(), src.data(), src.size() / 2));
}
void
BufferTest::bufferAddressIs512ByteAligned()
{
Buffer buf(32);
CPPUNIT_ASSERT(reinterpret_cast<size_t>(buf.getBuffer()) % 512 == 0);
}
} // memfile
} // storage
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