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#include <yt/cpp/mapreduce/io/yamr_table_reader.h>
#include <library/cpp/testing/gtest/gtest.h>
using namespace NYT;
template <>
void Out<std::tuple<TString, TString, TString>>(IOutputStream& out, const std::tuple<TString, TString, TString>& value) {
out << "{" << std::get<0>(value) << ", " << std::get<1>(value) << ", " << std::get<2>(value) << "}";
}
////////////////////////////////////////////////////////////////////////////////
class TRowCollection
{
public:
void AddRow(TStringBuf key, TStringBuf subkey, TStringBuf value)
{
TStringStream row;
auto appendLenval = [&] (TStringBuf value) {
ui32 size = value.size();
row.Write(&size, sizeof(size));
row.Write(value);
};
appendLenval(key);
appendLenval(subkey);
appendLenval(value);
RowList_.push_back(row.Str());
}
TString GetStreamDataStartFromRow(ui64 rowIndex) const
{
Y_ABORT_UNLESS(rowIndex < RowList_.size());
TStringStream ss;
ss.Write("\xFC\xFF\xFF\xFF");
ss.Write(&rowIndex, sizeof(rowIndex));
for (size_t i = rowIndex; i != RowList_.size(); ++i) {
ss.Write(RowList_[i]);
}
return ss.Str();
}
size_t ComputeTotalStreamSize() const {
return GetStreamDataStartFromRow(0).size();
}
private:
TVector<TString> RowList_;
};
class TTestRawTableReader
: public TRawTableReader
{
public:
TTestRawTableReader(const TRowCollection& rowCollection)
: RowCollection_(rowCollection)
, DataToRead_(RowCollection_.GetStreamDataStartFromRow(0))
, Input_(MakeHolder<TStringStream>(DataToRead_))
{ }
TTestRawTableReader(const TRowCollection& rowCollection, size_t breakPoint)
: RowCollection_(rowCollection)
, DataToRead_(RowCollection_.GetStreamDataStartFromRow(0).substr(0, breakPoint))
, Input_(MakeHolder<TStringStream>(DataToRead_))
, Broken_(true)
{ }
size_t DoRead(void* buf, size_t size) override
{
Y_ABORT_UNLESS(Input_);
size_t res = Input_->Read(buf, size);
if (!res && Broken_) {
ythrow yexception() << "Stream is broken";
}
return res;
}
bool Retry(
const TMaybe<ui32>& /*rangeIndex*/,
const TMaybe<ui64>& rowIndex,
const std::exception_ptr& /*error*/) override
{
if (--Retries < 0) {
return false;
}
ui64 actualRowIndex = rowIndex ? *rowIndex : 0;
DataToRead_ = RowCollection_.GetStreamDataStartFromRow(actualRowIndex);
Input_ = MakeHolder<TStringInput>(DataToRead_);
Broken_ = false;
return true;
}
void ResetRetries() override
{ }
bool HasRangeIndices() const override
{
return false;
}
private:
TRowCollection RowCollection_;
TString DataToRead_;
THolder<IInputStream> Input_;
bool Broken_ = false;
i32 Retries = 1;
};
TEST(TYamrTableReaderTest, TestReadRetry)
{
const TVector<std::tuple<TString, TString, TString>> expectedResult = {
{"foo1", "bar1", "baz1"},
{"foo2", "bar2", "baz2"},
{"foo3", "bar3", "baz3"},
};
TRowCollection rowCollection;
for (const auto& row : expectedResult) {
rowCollection.AddRow(std::get<0>(row), std::get<1>(row), std::get<2>(row));
}
ssize_t streamSize = rowCollection.ComputeTotalStreamSize();
for (ssize_t breakPoint = -1; breakPoint < streamSize; ++breakPoint) {
::TIntrusivePtr<TRawTableReader> rawReader;
if (breakPoint == -1) {
rawReader = ::MakeIntrusive<TTestRawTableReader>(rowCollection);
} else {
rawReader = ::MakeIntrusive<TTestRawTableReader>(rowCollection, static_cast<size_t>(breakPoint));
}
TYaMRTableReader tableReader(rawReader);
TVector<std::tuple<TString, TString, TString>> actualResult;
for (; tableReader.IsValid(); tableReader.Next()) {
EXPECT_TRUE(!tableReader.IsRawReaderExhausted());
auto row = tableReader.GetRow();
actualResult.emplace_back(row.Key, row.SubKey, row.Value);
}
EXPECT_TRUE(tableReader.IsRawReaderExhausted());
EXPECT_EQ(actualResult, expectedResult);
}
}
TEST(TYamrTableReaderTest, TestSkipRetry)
{
const TVector<std::tuple<TString, TString, TString>> expectedResult = {
{"foo1", "bar1", "baz1"},
{"foo2", "bar2", "baz2"},
{"foo3", "bar3", "baz3"},
};
TRowCollection rowCollection;
for (const auto& row : expectedResult) {
rowCollection.AddRow(std::get<0>(row), std::get<1>(row), std::get<2>(row));
}
ssize_t streamSize = rowCollection.ComputeTotalStreamSize();
for (ssize_t breakPoint = -1; breakPoint < streamSize; ++breakPoint) {
try {
::TIntrusivePtr<TRawTableReader> rawReader;
if (breakPoint == -1) {
rawReader = ::MakeIntrusive<TTestRawTableReader>(rowCollection);
} else {
rawReader = ::MakeIntrusive<TTestRawTableReader>(rowCollection, static_cast<size_t>(breakPoint));
}
TYaMRTableReader tableReader(rawReader);
ui32 rowCount = 0;
for (; tableReader.IsValid(); tableReader.Next()) {
EXPECT_TRUE(!tableReader.IsRawReaderExhausted());
++rowCount;
}
EXPECT_TRUE(tableReader.IsRawReaderExhausted());
EXPECT_EQ(rowCount, 3u);
} catch (const std::exception& ex) {
Cerr << breakPoint << Endl;
Cerr << ex.what() << Endl;
throw;
}
}
}
////////////////////////////////////////////////////////////////////////////////
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