libcryfs/test/cpp-utils/data/DataTest.cpp

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#include "cpp-utils/data/DataFixture.h"
#include "cpp-utils/data/Data.h"
#include <gtest/gtest.h>
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#include "cpp-utils/tempfile/TempFile.h"
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#include <fstream>
using ::testing::Test;
using ::testing::WithParamInterface;
using ::testing::Values;
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using cpputils::TempFile;
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using std::ifstream;
using std::ofstream;
namespace bf = boost::filesystem;
using namespace cpputils;
class DataTest: public Test {
public:
bool DataIsZeroes(const Data &data) {
for (size_t i = 0; i != data.size(); ++ i) {
if (((char*)data.data())[i] != 0) {
return false;
}
}
return true;
}
};
class DataTestWithSizeParam: public DataTest, public WithParamInterface<size_t> {
public:
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Data randomData;
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DataTestWithSizeParam(): randomData(DataFixture::generate(GetParam())) {}
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static void StoreData(const Data &data, const bf::path &filepath) {
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ofstream file(filepath.c_str(), std::ios::binary | std::ios::trunc);
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file.write((char*)data.data(), data.size());
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}
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static void EXPECT_STORED_FILE_DATA_CORRECT(const Data &data, const bf::path &filepath) {
EXPECT_EQ(data.size(), bf::file_size(filepath));
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ifstream file(filepath.c_str(), std::ios::binary);
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char *read_data = new char[data.size()];
file.read(read_data, data.size());
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EXPECT_EQ(0, std::memcmp(data.data(), read_data, data.size()));
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delete[] read_data;
}
};
INSTANTIATE_TEST_CASE_P(DataTestWithSizeParam, DataTestWithSizeParam, Values(0, 1, 2, 1024, 4096, 10*1024*1024));
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TEST_P(DataTestWithSizeParam, ZeroInitializedDataIsDifferentToRandomData) {
if (GetParam() != 0) {
Data data(GetParam());
data.FillWithZeroes();
EXPECT_NE(randomData, data);
}
}
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// Working on a large data area without a crash is a good indicator that we
// are actually working on memory that was validly allocated for us.
TEST_P(DataTestWithSizeParam, WriteAndCheck) {
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Data data = randomData.copy();
EXPECT_EQ(randomData, data);
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}
TEST_P(DataTestWithSizeParam, Size) {
Data data(GetParam());
EXPECT_EQ(GetParam(), data.size());
}
TEST_P(DataTestWithSizeParam, CheckStoredFile) {
TempFile file;
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randomData.StoreToFile(file.path());
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EXPECT_STORED_FILE_DATA_CORRECT(randomData, file.path());
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}
TEST_P(DataTestWithSizeParam, CheckLoadedData) {
TempFile file;
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StoreData(randomData, file.path());
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Data data = Data::LoadFromFile(file.path()).value();
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EXPECT_EQ(randomData, data);
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}
TEST_P(DataTestWithSizeParam, StoreDoesntChangeData) {
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Data data = randomData.copy();
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TempFile file;
data.StoreToFile(file.path());
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EXPECT_EQ(randomData, data);
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}
TEST_P(DataTestWithSizeParam, StoreAndLoad) {
TempFile file;
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randomData.StoreToFile(file.path());
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Data loaded_data = Data::LoadFromFile(file.path()).value();
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EXPECT_EQ(randomData, loaded_data);
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}
TEST_P(DataTestWithSizeParam, Copy) {
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Data copy = randomData.copy();
EXPECT_EQ(randomData, copy);
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}
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TEST_F(DataTest, ChangingCopyDoesntChangeOriginal) {
Data original = DataFixture::generate(1024);
Data copy = original.copy();
((uint8_t*)copy.data())[0] = ((uint8_t*)copy.data())[0] + 1;
EXPECT_EQ(DataFixture::generate(1024), original);
EXPECT_NE(copy, original);
}
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TEST_F(DataTest, InitializeWithZeroes) {
Data data(10*1024);
data.FillWithZeroes();
EXPECT_TRUE(DataIsZeroes(data));
}
TEST_F(DataTest, FillModifiedDataWithZeroes) {
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Data data = DataFixture::generate(10*1024);
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EXPECT_FALSE(DataIsZeroes(data));
data.FillWithZeroes();
EXPECT_TRUE(DataIsZeroes(data));
}
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TEST_F(DataTest, MoveConstructor) {
Data original = DataFixture::generate(1024);
Data copy(std::move(original));
EXPECT_EQ(DataFixture::generate(1024), copy);
EXPECT_EQ(nullptr, original.data());
EXPECT_EQ(0u, original.size());
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}
TEST_F(DataTest, MoveAssignment) {
Data original = DataFixture::generate(1024);
Data copy(0);
copy = std::move(original);
EXPECT_EQ(DataFixture::generate(1024), copy);
EXPECT_EQ(nullptr, original.data());
EXPECT_EQ(0u, original.size());
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}
TEST_F(DataTest, Equality) {
Data data1 = DataFixture::generate(1024);
Data data2 = DataFixture::generate(1024);
EXPECT_TRUE(data1 == data2);
EXPECT_FALSE(data1 != data2);
}
TEST_F(DataTest, Inequality_DifferentSize) {
Data data1 = DataFixture::generate(1024);
Data data2 = DataFixture::generate(1023);
EXPECT_FALSE(data1 == data2);
EXPECT_TRUE(data1 != data2);
}
TEST_F(DataTest, Inequality_DifferentFirstByte) {
Data data1 = DataFixture::generate(1024);
Data data2 = DataFixture::generate(1024);
((uint8_t*)data2.data())[0] = ((uint8_t*)data2.data())[0] + 1;
EXPECT_FALSE(data1 == data2);
EXPECT_TRUE(data1 != data2);
}
TEST_F(DataTest, Inequality_DifferentMiddleByte) {
Data data1 = DataFixture::generate(1024);
Data data2 = DataFixture::generate(1024);
((uint8_t*)data2.data())[500] = ((uint8_t*)data2.data())[500] + 1;
EXPECT_FALSE(data1 == data2);
EXPECT_TRUE(data1 != data2);
}
TEST_F(DataTest, Inequality_DifferentLastByte) {
Data data1 = DataFixture::generate(1024);
Data data2 = DataFixture::generate(1024);
((uint8_t*)data2.data())[1023] = ((uint8_t*)data2.data())[1023] + 1;
EXPECT_FALSE(data1 == data2);
EXPECT_TRUE(data1 != data2);
}
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#ifdef __x86_64__
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TEST_F(DataTest, LargesizeSize) {
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//Needs 64bit for representation. This value isn't in the size param list, because the list is also used for read/write checks.
uint64_t size = 4.5L*1024*1024*1024;
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Data data(size);
EXPECT_EQ(size, data.size());
}
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#else
#warning This is not a 64bit architecture. Large size data tests are disabled.
#endif
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TEST_F(DataTest, LoadingNonexistingFile) {
TempFile file(false); // Pass false to constructor, so the tempfile is not created
EXPECT_FALSE(Data::LoadFromFile(file.path()));
}