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#include <library/cpp/testing/unittest/registar.h>
#include <util/generic/yexception.h>
#include <util/system/fs.h>
#include <util/system/tempfile.h>
#include <util/random/random.h>
#include "direct_io.h"
static const char* FileName_("./test.file");
Y_UNIT_TEST_SUITE(TDirectIoTestSuite) {
Y_UNIT_TEST(TestDirectFile) {
TDirectIOBufferedFile file(FileName_, RdWr | Direct | Seq | CreateAlways, 1 << 15);
TVector<ui64> data((1 << 15) + 1);
TVector<ui64> readResult(data.size());
for (auto& i : data) {
i = RandomNumber<ui64>();
}
for (size_t writePos = 0; writePos < data.size();) {
size_t writeCount = Min<size_t>(1 + RandomNumber<size_t>(1 << 10), data.ysize() - writePos);
file.Write(&data[writePos], sizeof(ui64) * writeCount);
writePos += writeCount;
size_t readPos = RandomNumber(writePos);
size_t readCount = RandomNumber(writePos - readPos);
UNIT_ASSERT_VALUES_EQUAL(
file.Pread(&readResult[0], readCount * sizeof(ui64), readPos * sizeof(ui64)),
readCount * sizeof(ui64));
for (size_t i = 0; i < readCount; ++i) {
UNIT_ASSERT_VALUES_EQUAL(readResult[i], data[i + readPos]);
}
}
file.Finish();
TDirectIOBufferedFile fileNew(FileName_, RdOnly | Direct | Seq | OpenAlways, 1 << 15);
for (int i = 0; i < 1000; ++i) {
size_t readPos = RandomNumber(data.size());
size_t readCount = RandomNumber(data.size() - readPos);
UNIT_ASSERT_VALUES_EQUAL(
fileNew.Pread(&readResult[0], readCount * sizeof(ui64), readPos * sizeof(ui64)),
readCount * sizeof(ui64));
for (size_t j = 0; j < readCount; ++j) {
UNIT_ASSERT_VALUES_EQUAL(readResult[j], data[j + readPos]);
}
}
size_t readCount = data.size();
UNIT_ASSERT_VALUES_EQUAL(
fileNew.Pread(&readResult[0], readCount * sizeof(ui64), 0),
readCount * sizeof(ui64));
for (size_t i = 0; i < readCount; ++i) {
UNIT_ASSERT_VALUES_EQUAL(readResult[i], data[i]);
}
NFs::Remove(FileName_);
}
void TestHugeFile(size_t size) {
TTempFile tmpFile("test.file");
{
TDirectIOBufferedFile directIOFile(tmpFile.Name(), WrOnly | CreateAlways | Direct);
TVector<ui8> data(size, 'x');
directIOFile.Write(&data[0], data.size());
}
{
TDirectIOBufferedFile directIOFile(tmpFile.Name(), RdOnly | Direct);
TVector<ui8> data(size + 1, 'y');
const size_t readResult = directIOFile.Read(&data[0], data.size());
UNIT_ASSERT_VALUES_EQUAL(readResult, size);
UNIT_ASSERT_VALUES_EQUAL(data[0], 'x');
UNIT_ASSERT_VALUES_EQUAL(data[size / 2], 'x');
UNIT_ASSERT_VALUES_EQUAL(data[size - 1], 'x');
UNIT_ASSERT_VALUES_EQUAL(data[size], 'y');
}
}
Y_UNIT_TEST(TestHugeFile1) {
if constexpr (sizeof(size_t) > 4) {
TestHugeFile(5 * 1024 * 1024 * 1024ULL);
}
}
Y_UNIT_TEST(TestHugeFile2) {
if constexpr (sizeof(size_t) > 4) {
TestHugeFile(5 * 1024 * 1024 * 1024ULL + 1111);
}
}
} // Y_UNIT_TEST_SUITE(TDirectIoTestSuite)
Y_UNIT_TEST_SUITE(TDirectIoErrorHandling) {
Y_UNIT_TEST(Constructor) {
// A non-existent file should not be opened for reading
UNIT_ASSERT_EXCEPTION(TDirectIOBufferedFile(FileName_, RdOnly, 1 << 15), TFileError);
}
Y_UNIT_TEST(WritingReadOnlyFileBufferFlushed) {
// Note the absence of Direct
TDirectIOBufferedFile file(FileName_, RdOnly | OpenAlways, 1);
TString buffer = "Hello";
UNIT_ASSERT_EXCEPTION(file.Write(buffer.data(), buffer.size()), TFileError);
NFs::Remove(FileName_);
}
Y_UNIT_TEST(WritingReadOnlyFileAllInBuffer) {
TDirectIOBufferedFile file(FileName_, RdOnly | Direct | Seq | OpenAlways, 1 << 15);
TString buffer = "Hello";
// Doesn't throw because of buffering.
file.Write(buffer.data(), buffer.size());
UNIT_ASSERT_EXCEPTION(file.Finish(), TFileError);
NFs::Remove(FileName_);
}
} // Y_UNIT_TEST_SUITE(TDirectIoErrorHandling)
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