transmission/tests/libtransmission/benc-test.cc

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// This file Copyright (C) 2022 Mnemosyne LLC.
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// It may be used under GPLv2 (SPDX: GPL-2.0-only), GPLv3 (SPDX: GPL-3.0-only),
// or any future license endorsed by Mnemosyne LLC.
// License text can be found in the licenses/ folder.
#include <fmt/core.h>
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#include <libtransmission/transmission.h>
#include <libtransmission/benc.h>
#include "gtest/gtest.h"
using BencTest = ::testing::Test;
using namespace std::literals;
TEST_F(BencTest, MalformedBenc)
{
// malformed benc seen in the wild. "119" length is incorrect.
auto constexpr Benc =
"d14:failure reason119:The tracker was unable to process your request. It may be down, overloaded, under attack or it just does not like you.12:min intervali1800e8:intervali1800e5:peers0:ee\n"sv;
auto constexpr MaxBencDepth = 8;
using TestHandler = transmission::benc::BasicHandler<MaxBencDepth>;
auto stack = transmission::benc::ParserStack<MaxBencDepth>{};
auto handler = TestHandler{};
tr_error* error = nullptr;
EXPECT_FALSE(transmission::benc::parse(Benc, stack, handler, nullptr, &error));
EXPECT_NE(nullptr, error);
if (error != nullptr)
{
EXPECT_NE(nullptr, error->message);
}
tr_error_clear(&error);
}
TEST_F(BencTest, ContextTokenIsCorrect)
{
// clang-format off
auto constexpr Benc =
"d"
"8:complete" "i3e"
"10:downloaded" "i2e"
"10:incomplete" "i0e"
"8:interval" "i1803e"
"12:min interval" "i1800e"
"5:peers" "0:"
"e"sv;
// clang-format on
auto constexpr MaxBencDepth = 32;
struct ContextHandler final : public transmission::benc::BasicHandler<MaxBencDepth>
{
using BasicHandler = transmission::benc::BasicHandler<MaxBencDepth>;
bool StartArray(Context const& context) override
{
BasicHandler::StartArray(context);
EXPECT_EQ("l"sv, context.raw());
return true;
}
bool EndArray(Context const& context) override
{
BasicHandler::EndArray(context);
EXPECT_EQ("e"sv, context.raw());
return true;
}
bool StartDict(Context const& context) override
{
BasicHandler::StartDict(context);
EXPECT_EQ("d"sv, context.raw());
return true;
}
bool EndDict(Context const& context) override
{
BasicHandler::EndDict(context);
EXPECT_EQ("e"sv, context.raw());
return true;
}
bool Int64(int64_t value, Context const& context) override
{
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EXPECT_EQ(fmt::format(FMT_STRING("i{:d}e"), value), context.raw());
return true;
}
bool String(std::string_view value, Context const& context) override
{
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EXPECT_EQ(fmt::format(FMT_STRING("{:d}:{:s}"), std::size(value), value), context.raw());
return true;
}
};
auto stack = transmission::benc::ParserStack<MaxBencDepth>{};
auto handler = ContextHandler{};
tr_error* error = nullptr;
transmission::benc::parse(Benc, stack, handler, nullptr, &error);
}