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#include <library/cpp/testing/unittest/registar.h>
#include <util/generic/string.h>
#include <util/generic/array_size.h>
#include "buffered.h"
#include "direct_io.h"
Y_UNIT_TEST_SUITE(TDirectIOTests) {
// Decrease numBufToWrite further if tests continue to time out
static void Y_NO_INLINE Test(EOpenMode mode, size_t numBufToWrite) {
const char TEMPLATE[] = "qwertyuiopQWERTYUIOPasdfghjklASD";
const auto TEMPLATE_SIZE = Y_ARRAY_SIZE(TEMPLATE) - 1;
static_assert(TEMPLATE_SIZE > 0, "must be greater than zero");
const size_t BUFFER_SIZE = 32 * 1024;
static_assert(0 == BUFFER_SIZE % TEMPLATE_SIZE, "must be divisible");
const size_t CHUNK_SIZE_TO_READ = 512;
static_assert(0 == CHUNK_SIZE_TO_READ % TEMPLATE_SIZE, "must be divisible");
// filling buffer
// TEMPLATE|TEMPLATE|TEMPLATE|...
auto&& buffer = TBuffer{BUFFER_SIZE};
for (size_t i = 0; i < BUFFER_SIZE / TEMPLATE_SIZE; ++i) {
buffer.Append(TEMPLATE, TEMPLATE_SIZE);
}
// filling file
// TEMPLATE|TEMPLATE|TEMPLATE|...
const auto fileName = TString("test.file");
auto&& directIOBuffer = TDirectIOBufferedFile{fileName, RdWr | CreateAlways | mode};
{
auto&& output = TRandomAccessFileOutput{directIOBuffer};
for (size_t i = 0; i < numBufToWrite; ++i) {
output.Write(buffer.Data(), BUFFER_SIZE);
}
}
auto&& reader = TRandomAccessFileInput{directIOBuffer, 0};
auto&& input = TBufferedInput{&reader, 1 << 17};
auto bytesRead = size_t{};
while (auto len = input.Read(buffer.Data(), CHUNK_SIZE_TO_READ)) {
bytesRead += len;
while (len) {
if (len < TEMPLATE_SIZE) {
UNIT_ASSERT(!memcmp(buffer.Data(), TEMPLATE, len));
len = 0;
} else {
UNIT_ASSERT(!memcmp(buffer.Data(), TEMPLATE, TEMPLATE_SIZE));
len -= TEMPLATE_SIZE;
}
}
}
UNIT_ASSERT_VALUES_EQUAL(bytesRead, numBufToWrite * BUFFER_SIZE);
}
Y_UNIT_TEST(ReadWriteTest) {
Test(0, 100 * 32);
}
Y_UNIT_TEST(ReadWriteDirectTest) {
Test(Direct, 100 * 4);
}
Y_UNIT_TEST(ReadWriteDirectSeqTest) {
Test(Direct | Seq, 100 * 4);
}
} // Y_UNIT_TEST_SUITE(TDirectIOTests)
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