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#include <library/cpp/testing/gtest/gtest.h>
#include <library/cpp/yt/string/stream.h>
#include <util/stream/str.h>
namespace NYT {
namespace {
////////////////////////////////////////////////////////////////////////////////
TEST(TStdStringOutputTest, AppendsToReferencedString)
{
std::string buffer = "abc";
{
TStdStringOutput output(buffer);
output << "de" << 'f' << 42;
}
EXPECT_EQ(buffer, "abcdef42");
}
TEST(TStdStringOutputTest, MatchesTStringOutput)
{
std::string stdBuffer;
TString utilBuffer;
TStdStringOutput stdOutput(stdBuffer);
TStringOutput utilOutput(utilBuffer);
for (int i = 0; i < 1000; ++i) {
stdOutput << i << ',';
utilOutput << i << ',';
}
EXPECT_EQ(stdBuffer, std::string(utilBuffer));
}
TEST(TStdStringStreamTest, WriteAndStr)
{
TStdStringStream stream;
EXPECT_FALSE(static_cast<bool>(stream));
stream << "value=" << 123;
EXPECT_TRUE(static_cast<bool>(stream));
EXPECT_EQ(stream.Str(), "value=123");
EXPECT_EQ(stream.Size(), 9u);
}
TEST(TStdStringStreamTest, ClearAndReuse)
{
TStdStringStream stream("seed");
EXPECT_EQ(stream.Str(), "seed");
stream.Clear();
EXPECT_TRUE(stream.Empty());
stream << "again";
EXPECT_EQ(stream.Str(), "again");
}
TEST(TStdStringStreamTest, MoveOutBuffer)
{
TStdStringStream stream;
stream << "movable";
std::string extracted = std::move(stream).Str();
EXPECT_EQ(extracted, "movable");
}
////////////////////////////////////////////////////////////////////////////////
} // namespace
} // namespace NYT
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