libcryfs/test/implementations/onblocks/datanodestore/DataNodeViewTest.cpp

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#include "../../../../implementations/onblocks/datanodestore/DataNodeView.h"
#include <google/gtest/gtest.h>
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#include "messmer/blockstore/implementations/testfake/FakeBlockStore.h"
#include "messmer/blockstore/implementations/testfake/FakeBlock.h"
#include "../../../../implementations/onblocks/BlobStoreOnBlocks.h"
#include "../../../testutils/DataBlockFixture.h"
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using ::testing::Test;
using ::testing::WithParamInterface;
using ::testing::Values;
using std::unique_ptr;
using std::make_unique;
using std::string;
using blockstore::BlockStore;
using blockstore::testfake::FakeBlockStore;
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using namespace blobstore;
using namespace blobstore::onblocks;
using namespace blobstore::onblocks::datanodestore;
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class DataNodeViewTest: public Test {
public:
unique_ptr<BlockStore> blockStore = make_unique<FakeBlockStore>();
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};
class DataNodeViewDepthTest: public DataNodeViewTest, public WithParamInterface<uint8_t> {
};
INSTANTIATE_TEST_CASE_P(DataNodeViewDepthTest, DataNodeViewDepthTest, Values(0, 1, 3, 10, 100));
TEST_P(DataNodeViewDepthTest, DepthIsStored) {
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auto block = blockStore->create(BlobStoreOnBlocks::BLOCKSIZE);
auto key = block->key();
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{
DataNodeView view(std::move(block));
*view.Depth() = GetParam();
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}
DataNodeView view(blockStore->load(key));
EXPECT_EQ(GetParam(), *view.Depth());
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}
class DataNodeViewSizeTest: public DataNodeViewTest, public WithParamInterface<uint32_t> {
};
INSTANTIATE_TEST_CASE_P(DataNodeViewSizeTest, DataNodeViewSizeTest, Values(0, 50, 64, 1024, 1024*1024*1024));
TEST_P(DataNodeViewSizeTest, SizeIsStored) {
auto block = blockStore->create(BlobStoreOnBlocks::BLOCKSIZE);
auto key = block->key();
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{
DataNodeView view(std::move(block));
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*view.Size() = GetParam();
}
DataNodeView view(blockStore->load(key));
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EXPECT_EQ(GetParam(), *view.Size());
}
TEST_F(DataNodeViewTest, DataIsStored) {
DataBlockFixture randomData(DataNodeView::DATASIZE_BYTES);
auto block = blockStore->create(DataNodeView::BLOCKSIZE_BYTES);
auto key = block->key();
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{
DataNodeView view(std::move(block));
std::memcpy(view.DataBegin<uint8_t>(), randomData.data(), randomData.size());
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}
DataNodeView view(blockStore->load(key));
EXPECT_EQ(0, std::memcmp(view.DataBegin<uint8_t>(), randomData.data(), randomData.size()));
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}
TEST_F(DataNodeViewTest, HeaderAndBodyDontOverlap) {
DataBlockFixture randomData(DataNodeView::DATASIZE_BYTES);
auto block = blockStore->create(BlobStoreOnBlocks::BLOCKSIZE);
auto key = block->key();
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{
DataNodeView view(std::move(block));
*view.Depth() = 3;
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*view.Size() = 1000000000u;
std::memcpy(view.DataBegin<uint8_t>(), randomData.data(), DataNodeView::DATASIZE_BYTES);
}
DataNodeView view(blockStore->load(key));
EXPECT_EQ(3, *view.Depth());
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EXPECT_EQ(1000000000u, *view.Size());
EXPECT_EQ(0, std::memcmp(view.DataBegin<uint8_t>(), randomData.data(), DataNodeView::DATASIZE_BYTES));
}
TEST_F(DataNodeViewTest, DataBeginWorksWithOneByteEntries) {
auto block = blockStore->create(BlobStoreOnBlocks::BLOCKSIZE);
uint8_t *blockBegin = (uint8_t*)block->data();
DataNodeView view(std::move(block));
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EXPECT_EQ(blockBegin+view.HEADERSIZE_BYTES, view.DataBegin<uint8_t>());
}
TEST_F(DataNodeViewTest, DataBeginWorksWithEightByteEntries) {
auto block = blockStore->create(BlobStoreOnBlocks::BLOCKSIZE);
uint8_t *blockBegin = (uint8_t*)block->data();
DataNodeView view(std::move(block));
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EXPECT_EQ(blockBegin+view.HEADERSIZE_BYTES, (uint8_t*)view.DataBegin<uint64_t>());
}
TEST_F(DataNodeViewTest, DataEndWorksWithOneByteEntries) {
auto block = blockStore->create(BlobStoreOnBlocks::BLOCKSIZE);
uint8_t *blockBegin = (uint8_t*)block->data();
DataNodeView view(std::move(block));
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EXPECT_EQ(blockBegin+view.BLOCKSIZE_BYTES, view.DataEnd<uint8_t>());
}
TEST_F(DataNodeViewTest, DataEndWorksWithEightByteEntries) {
auto block = blockStore->create(BlobStoreOnBlocks::BLOCKSIZE);
uint8_t *blockBegin = (uint8_t*)block->data();
DataNodeView view(std::move(block));
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EXPECT_EQ(blockBegin+view.BLOCKSIZE_BYTES, (uint8_t*)view.DataEnd<uint64_t>());
}
struct SizedDataEntry {
uint8_t data[6];
};
BOOST_STATIC_ASSERT_MSG(DataNodeView::DATASIZE_BYTES % sizeof(SizedDataEntry) != 0,
"This test case only makes sense, if the data entries don't fill up the whole space. "
"There should be some space left at the end that is not used, because it isn't enough space for a full entry. "
"If this static assertion fails, please use a different size for SizedDataEntry.");
TEST_F(DataNodeViewTest, DataBeginWorksWithStructEntries) {
auto block = blockStore->create(BlobStoreOnBlocks::BLOCKSIZE);
uint8_t *blockBegin = (uint8_t*)block->data();
DataNodeView view(std::move(block));
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EXPECT_EQ(blockBegin+view.HEADERSIZE_BYTES, (uint8_t*)view.DataBegin<SizedDataEntry>());
}
TEST_F(DataNodeViewTest, DataEndWorksWithStructByteEntries) {
auto block = blockStore->create(BlobStoreOnBlocks::BLOCKSIZE);
uint8_t *blockBegin = (uint8_t*)block->data();
DataNodeView view(std::move(block));
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unsigned int numFittingEntries = view.DATASIZE_BYTES / sizeof(SizedDataEntry);
uint8_t *dataEnd = (uint8_t*)view.DataEnd<SizedDataEntry>();
EXPECT_EQ(blockBegin+view.HEADERSIZE_BYTES + numFittingEntries * sizeof(SizedDataEntry), dataEnd);
EXPECT_LT(dataEnd, blockBegin + view.BLOCKSIZE_BYTES);
}