libcryfs/test/implementations/onblocks/BlobSizeTest.cpp

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#include "testutils/BlobStoreTest.h"
#include <messmer/blockstore/utils/Data.h>
#include "../../testutils/DataBlockFixture.h"
using std::unique_ptr;
using namespace blobstore;
using blockstore::Key;
using blockstore::Data;
class BlobSizeTest: public BlobStoreTest {
public:
BlobSizeTest(): blob(blobStore->create()) {}
static constexpr uint32_t MEDIUM_SIZE = 5 * 1024 * 1024;
static constexpr uint32_t LARGE_SIZE = 10 * 1024 * 1024;
unique_ptr<Blob> blob;
};
constexpr uint32_t BlobSizeTest::MEDIUM_SIZE;
constexpr uint32_t BlobSizeTest::LARGE_SIZE;
TEST_F(BlobSizeTest, CreatedBlobIsEmpty) {
EXPECT_EQ(0, blob->size());
}
TEST_F(BlobSizeTest, Growing_1Byte) {
blob->resize(1);
EXPECT_EQ(1, blob->size());
}
TEST_F(BlobSizeTest, Growing_Large) {
blob->resize(LARGE_SIZE);
EXPECT_EQ(LARGE_SIZE, blob->size());
}
TEST_F(BlobSizeTest, Shrinking_Empty) {
blob->resize(LARGE_SIZE);
blob->resize(0);
EXPECT_EQ(0, blob->size());
}
TEST_F(BlobSizeTest, Shrinking_1Byte) {
blob->resize(LARGE_SIZE);
blob->resize(1);
EXPECT_EQ(1, blob->size());
}
TEST_F(BlobSizeTest, ResizingToItself_Empty) {
blob->resize(0);
EXPECT_EQ(0, blob->size());
}
TEST_F(BlobSizeTest, ResizingToItself_1Byte) {
blob->resize(1);
blob->resize(1);
EXPECT_EQ(1, blob->size());
}
TEST_F(BlobSizeTest, ResizingToItself_Large) {
blob->resize(LARGE_SIZE);
blob->resize(LARGE_SIZE);
EXPECT_EQ(LARGE_SIZE, blob->size());
}
TEST_F(BlobSizeTest, EmptyBlobStaysEmptyWhenLoading) {
Key key = blob->key();
blob.reset();
auto loaded = blobStore->load(key);
EXPECT_EQ(0, loaded->size());
}
TEST_F(BlobSizeTest, BlobSizeStaysIntactWhenLoading) {
blob->resize(LARGE_SIZE);
Key key = blob->key();
blob.reset();
auto loaded = blobStore->load(key);
EXPECT_EQ(LARGE_SIZE, loaded->size());
}
TEST_F(BlobSizeTest, WritingAtEndOfBlobGrowsBlob_Empty) {
int value;
blob->write(&value, 0, 4);
EXPECT_EQ(4, blob->size());
}
TEST_F(BlobSizeTest, WritingAfterEndOfBlobGrowsBlob_Empty) {
int value;
blob->write(&value, 2, 4);
EXPECT_EQ(6, blob->size());
}
TEST_F(BlobSizeTest, WritingOverEndOfBlobGrowsBlob_NonEmpty) {
blob->resize(1);
int value;
blob->write(&value, 0, 4);
EXPECT_EQ(4, blob->size());
}
TEST_F(BlobSizeTest, WritingAtEndOfBlobGrowsBlob_NonEmpty) {
blob->resize(1);
int value;
blob->write(&value, 1, 4);
EXPECT_EQ(5, blob->size());
}
TEST_F(BlobSizeTest, WritingAfterEndOfBlobGrowsBlob_NonEmpty) {
blob->resize(1);
int value;
blob->write(&value, 2, 4);
EXPECT_EQ(6, blob->size());
}
TEST_F(BlobSizeTest, ChangingSizeImmediatelyFlushes) {
blob->resize(LARGE_SIZE);
auto loaded = blobStore->load(blob->key());
EXPECT_EQ(LARGE_SIZE, loaded->size());
}
class BlobSizeDataTest: public BlobSizeTest {
public:
BlobSizeDataTest()
:ZEROES(LARGE_SIZE),
randomData(LARGE_SIZE) {
ZEROES.FillWithZeroes();
}
Data readBlob(const Blob &blob) {
Data data(blob.size());
blob.read(data.data(), 0, data.size());
return data;
}
Data ZEROES;
DataBlockFixture randomData;
};
TEST_F(BlobSizeDataTest, BlobIsZeroedOutAfterGrowing) {
blob->resize(LARGE_SIZE);
EXPECT_EQ(0, std::memcmp(readBlob(*blob).data(), ZEROES.data(), LARGE_SIZE));
}
TEST_F(BlobSizeDataTest, BlobIsZeroedOutAfterGrowingAndLoading) {
blob->resize(LARGE_SIZE);
auto loaded = blobStore->load(blob->key());
EXPECT_EQ(0, std::memcmp(readBlob(*loaded).data(), ZEROES.data(), LARGE_SIZE));
}
TEST_F(BlobSizeDataTest, DataStaysIntactWhenGrowing) {
blob->resize(MEDIUM_SIZE);
blob->write(randomData.data(), 0, MEDIUM_SIZE);
blob->resize(LARGE_SIZE);
EXPECT_EQ(0, std::memcmp(readBlob(*blob).data(), randomData.data(), MEDIUM_SIZE));
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EXPECT_EQ(0, std::memcmp((uint8_t*)readBlob(*blob).data() + MEDIUM_SIZE, ZEROES.data(), LARGE_SIZE-MEDIUM_SIZE));
}
TEST_F(BlobSizeDataTest, DataStaysIntactWhenShrinking) {
blob->resize(LARGE_SIZE);
blob->write(randomData.data(), 0, LARGE_SIZE);
blob->resize(MEDIUM_SIZE);
EXPECT_EQ(0, std::memcmp(readBlob(*blob).data(), randomData.data(), MEDIUM_SIZE));
}
TEST_F(BlobSizeDataTest, ChangedAreaIsZeroedOutWhenShrinkingAndRegrowing) {
blob->resize(LARGE_SIZE);
blob->write(randomData.data(), 0, LARGE_SIZE);
blob->resize(MEDIUM_SIZE);
blob->resize(LARGE_SIZE);
EXPECT_EQ(0, std::memcmp(readBlob(*blob).data(), randomData.data(), MEDIUM_SIZE));
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EXPECT_EQ(0, std::memcmp((uint8_t*)readBlob(*blob).data() + MEDIUM_SIZE, ZEROES.data(), LARGE_SIZE-MEDIUM_SIZE));
}